Coordination no for bcc, fcc and hcp are
c.
8, 12 and 12
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The number of atoms per unit cell of CsCl molecule which crystallises in body centred cubic structure
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A crystal which do not have elements of symmetry
c.
CuSO4.5H2O
Correct Answer
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Find the interplanar distance in a crystal in which a series of planes produced a first order reflection from a Copper X-ray tube $(λ$ $=$ 1.539 Å) at an angle of 22.5° [sin(22.5)° $=$ 0.383]
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Which of the following crystals has the maximum value of radius ratio?
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Which of the following is example for covalent crystal?
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Monoclinic sulphur has ________ axial angle.
a.
$α$ $=$ $β$ $=$ $γ$ $=$ 90°
b.
$α$ $=$ $β$ $=$ 90°, $γ$ $=$ 120°
Correct Answer
c.
$α$ $≠$ $β$ $≠$ $γ$ $≠$ 90°
d.
$α$ $=$ $γ$ $=$ 90°, $β$ $≠$ 90° / $α$ $=$ $β$ $=$ 90°, $γ$ $=$ 70°
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How many axes of symmetry possessed by NaCl crystal?
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Repeatable entity of a 3D crystal structure is called as
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Among the following statements choose the correct statement
(i) Crystalline solids have irregular shape
(ii) Crystalline solids are isotropic in nature
(iii) Crystalline solids are anisotropic in nature
(iv) Crystalline solids have sharp melting points
a.
(iii) and (iv)
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Entropy is a measure of ________ of the molecules of the system.
d.
Zig-zag motion (or) disorder
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Which of the following factors does not influence the value of $ΔG$ according to the Gibbs-Helmholtz equation?
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Choose the right answer: In a cyclic process, the change in internal energy of the system is
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Which is the correct unit for entropy?
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When water is cooled to ice, its entropy,
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Which of the following statement is/are correct?
(1) All natural process are thermodynamically irreversible
(2) The energy of the universe is constant
(3) The entropy of the universe is continuously decreasing
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Which of the following equations used to calculate the heats of reaction when $ΔG$ at two temperatures are given?
a.
Gibbs Helmholtz equation
d.
Clausius Clapeyron equation
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When a gas is made to expand adiabatically from a region of high pressure into a region of low pressure, its temperature
d.
Increases in some case and decreases in others
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The entropy of the system increases in the order
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Thermodynamics is applicable to
a.
Microscopic systems only
b.
Macroscopic systems only
c.
Homogeneous systems only
d.
Heterogeneous systems only
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The change in free energy is a measure of
c.
Net change in enthalpy
d.
Net change in internal energy
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$ΔU/mole$ is ________ property and $ΔU$ is a ________ property.
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Which of the following equation is correct for work function?
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Which of the following sets of properties constitute intensive properties?
a.
Temp, pressure and volume
b.
Mass, density and volume
c.
Density, pressure and temperature
d.
Internal energy, density and pressure
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If the values of enthalpy change and free energy change are -68.32 and -56.69 Kcals respectively, the value of $ΔG$ at 25°C is
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According to Hess's law, for an exothermic reaction run at constant T and P.
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Which of the following equation represent Kirchoff's equation?
a.
$ΔH2$ - $ΔH1$ $=$ $ΔCp$ (T2 - T1)
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Thermodynamics is applicable to
a.
Microscopic systems only
b.
Macroscopic systems only
c.
Homogeneous system only
d.
Heterogeneous system only
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If we heat a sample of water from 0°C to 25°C, the change in temperature in a state of a system is equal to
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For a reversible change taking place at a fixed temperature (T), how the change in entropy $(ΔS$) is related to heat energy in a system?
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According to Lechatelier-Braun principle, the formation of ammonia is favored by an
a.
Increase in total pressure
b.
Decrease in total pressure
d.
Increase in temperature
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Which is the correct unit for entropy?
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Which of the following relations is true?
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Three moles of an ideal gas (Cv $=$ 5 cal/deg/mol) at 10.0 atm and 0° are converted to 2.0 atm at 50°C. Find $ΔE$ and $ΔH$ for the change (R $=$ 2 cal/mol/deg)
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A system in which no thermal energy passes into or out of the system is called
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Methyl orange indicator is a/an
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An example for oxidation-reduction indicator among the following is
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In the titration of KMnO4 with FeSO4 in acidic medium, the indicator used is
d.
KMnO4 (Self-indicator)
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________ is an example of chelating precipitating reagent.
d.
Di ammonium hydrogen phosphate
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________ group should contain the resins as ion exchanger?
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The basis of separation of column chromatography is
d.
Partition of solute between two immiscible liquids
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Methyl Orange gives red colour in acid medium, the pH range is
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The point at which an indicator changes its colour is known as the
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________ is used as precipitating agent for the gravimetric analysis of lead
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Name the precipitating reagent being used in estimation of $Mg^{2+}$ gravimetrically.
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What is the oxidation state of platinum in the complex [Pt(NH3)2Cl2]Cl2?
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The geometry of Fe(CO)5 molecule is
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AgCl is soluble in ammonia due to the formation of which following complex ion?
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Which type of isomerism is shown by those complex compounds that are composed of complex cation and complex anion?
d.
Coordination Isomerism
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When a coordination compound CoCl3.6NH3 is mixed with AgNO3, 3 moles of AgCl are precipitated per mole of the compound. Write the structural formula of the complex?
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The molecular formula CoCl3.6NH3 treated with AgNO3 gives three moles of AgCl. The correct coordination formula of the above compound is
d.
[Co(NH3)6]Cl3 / [CoCl(NH3)5]Cl5.NH3
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The species that can have a Trans-Isomer is
(i) [Pt(en)Cl2]
(ii) $[Pt(en)2Cl2]^{2+}$
(iii) [Zn(en)Cl2]
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Coordination number of Iron in this coordination complex [Fe(H2O)2(C2O4)2]SO4 is
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According to Werner's co-ordination theory the primary valency is
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Match the following:
(a) CoCl3.6NH3 1. Purple
(b) CoCl3.5NH3 2. Violet
(c) CoCl3.4NH3 3. Green
(d) CoCl3.NH3 4. Yellow
a.
(a)-1, (b)-2, (c)-3, (d)-4
b.
(a)-2, (b)-1, (c)-4, (d)-3
c.
(a)-4, (b)-3, (c)-2, (d)-1
d.
(a)-4, (b)-1, (c)-2, (d)-3
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Which of the following represents a racemic mixture?
a.
75% (R)-2-Butanol, 25% (S)-2-Butanol
b.
25% (R)-2-Butanol, 75% (S)-2-Butanol
c.
50% (R)-2-Butanol, 50% (S)-2-Butanol
d.
100% (R)-2-Butanol, 0% (S)-2-Butanol
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Assign R (or) S configuration of the compound:
H
|
HO - C - CH2OH
|
CHO
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Optical isomers that are mirror images to each other are called
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Find the most stable conformations of 1,2- and 1,3-dimethylcyclohexane
a.
Trans 1a, 2a and cis 1a, 3a
b.
Trans 1e, 2e and cis 1e, 3e
c.
Cis 1a, 2e and Trans 1e, 3a
d.
Cis 1e, 2a and Trans 1a, 3e
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Why Mesotartaric acid is optically Inactive?
a.
Due to plane of symmetry
b.
Rotation of plane polarised light is cancelled
c.
Due to Internal compensation
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Energy difference between which two conformations of cyclohexane is lowest?
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The isomers of a substance must have
a.
Same chemical properties
c.
Same structural formula
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Which of the following isomeric compounds show optical isomerism?
d.
2,2-Dimethyl propylamine
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Assign R and S configuration in the following order:
(I) Br - C(H)(OH) - C2H5
(II) H - C(CH3)(NH2) - C2H5
(III) CHO - C(OH)(H) - CH2OH
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Which of the following solvents is not used for determining the specific rotation of an asymmetric compound?
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Arrange the following in the decreasing order of the -I effect of the groups:
(i) -NO2
(ii) -COOH
(iii) -I
(iv) -OCH3
a.
-OCH3 > -COOH > -NO2 > -I
b.
-NO2 > -COOH > -I > -OCH3
c.
-I > -NO2 > -COOH > -OCH3
d.
-COOH > -OCH3 > -I > -NO2
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The temporary effect involving the complete transfer of a shared pair of electrons to one atom involved in a multiple bond is known as
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Which of the following exhibit +R effect?
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Among the following acids, which has least pKa value?
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The kind of delocalization involving sigma bond orbitals is called
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Which of the following carbonium ions will be most stable?
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Arrange the following in order of decreasing acidity:
1. CH3CH2OH
2. Cl-CH2CH2CO2H
3. (CH3)3COH
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Which of the following compounds will not show geometrical isomerism?
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Asymmetry effect is also known as ________ in electrochemistry.
a.
Electrophoretic effect
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Calculate the equivalent conductance at 20°C of NH4OH at infinite dilution. Given $λ_∞(NH4Cl$) $=$ 130, $λ_∞(OH^-$) $=$ 174 and $λ_∞(Cl^-$) $=$ 66
a.
110 $ohm^{-1}$ $cm^{2}$ $eqvt^{-1}$
b.
262 $ohm^{-1}$ $cm^{2}$ $eqvt^{-1}$
c.
238 $ohm^{-1}$ $cm^{2}$ $eqvt^{-1}$
d.
100 $ohm^{-1}$ $cm^{2}$ $eqvt^{-1}$
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The reciprocal of specific resistance is called
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Which of the following pair(s) is/are incorrectly matched?
(1) Resistance - Ohm
(2) Resistivity - Ohm.metre
(3) Conductance - Seimens
(4) Conductivity - Seimens per metre
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What is the symbol of standard hydrogen electrode?
a.
Pt, Cl2(g)(1atm) / $H^{+}$
b.
Pt, H2(g)(1atm) / Cl^-
c.
Pt, H2(g)(1atm) / $H^{+}$
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The Daniel cell is
c.
Both reversible and irreversible
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The units of specific conductance are
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Unit of molar conductance is
a.
$ohm^{-2}$ $cm^{2}$ $mol^{-2}$
b.
$ohm^{-1}$ cm $mol^{-2}$
c.
$ohm^{-1}$ $cm^{2}$ $mol^{-1}$
d.
$ohm^{-2}$ cm $mol^{-1}$
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The site of oxidation in an electrochemical cell is
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Which of the following cannot be determined using Kohlrausch's law?
a.
Absolute ionic motilities
b.
Solubility of sparingly soluble salts
c.
Rate constant of a chemical reaction
d.
Degree of dissociation of an electrolyte
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Assertion [A]: The mobility of sodium ion is lower than that of potassium ion.
Reason [R]: The mobility of ions depends on the net radius of the ion.
a.
Both [A] and [R] are true and [R] is the correct explanation of [A]
b.
Both [A] and [R] are true but [R] is not the correct explanation of [A]
c.
[A] is true but [R] is false
d.
[A] is false but [R] is true
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The molar conductance of sodium acetate, hydrochloric acid and sodium chloride of infinite dilution are 91.0 x $10^{-4}$, 426.16 x $10^{-4}$ and 126.45 x $10^{-4}$ S $m^{2}$ $mol^{-1}$ respectively. The molar conductance at infinite dilution of acetic acid is
a.
390.71 x $10^{-4}$ S $m^{2}$ $mol^{-1}$
b.
-208.71 x $10^{-4}$ S $m^{2}$ $mol^{-1}$
c.
208.71 x $10^{-4}$ S $m^{2}$ $mol^{-1}$
d.
461.61 x $10^{-4}$ S $m^{2}$ $mol^{-1}$
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The potential of standard hydrogen electrode is conventionally taken as
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Match the terms with corresponding units:
Term:
(a) Specific resistance
(b) Equivalent conductivity
(c) Transport number
(d) Cell constant
Units:
1. $ohm^{-1}$ $cm^{2}$ $eq^{-1}$
2. $cm^{-1}$
3. ohm cm
4. Unit less
a.
(a)-2, (b)-4, (c)-1, (d)-3
b.
(a)-3, (b)-1, (c)-4, (d)-2
c.
(a)-3, (b)-2, (c)-4, (d)-1
d.
(a)-1, (b)-2, (c)-3, (d)-4
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Match the electrodes given in column I with their types given in column II:
Column I:
(a) $Sn^{2+}/Sn^{4+}$
(b) Cl2/Cl^-
(c) Calomel
(d) $Zn/Zn^{2+}$
Column II:
1. Gas electrode
2. Metal-metal ion electrode
3. Oxidation-reduction electrode
4. Reference electrode
a.
(a)-4, (b)-3, (c)-1, (d)-2
b.
(a)-2, (b)-1, (c)-4, (d)-3
c.
(a)-3, (b)-4, (c)-1, (d)-2
d.
(a)-3, (b)-1, (c)-4, (d)-2
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The plot of log(a - x) versus ________ gives a straight line for first order reactions.
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In the following reactions, which is/are third order reactions?
(1) NO + N2O5 -> 3NO2
(2) CO + Cl2 -> COCl2
(3) 2NO + O2 -> 2NO2
(4) R-COO-R' + NaOH -> R-COOH + R'OH
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The rate constant is given by the equation K $=$ P.Z.e^(-Ea/RT), which factor should register a decrease for the reaction to proceed more rapidly
c.
Ea (Activation energy)
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The rate of a reaction is directly proportional to
a.
The products concentrations
b.
The reactants concentration
c.
The reactants and product concentration
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The third order reaction the rate constant (k) has the unit
a.
$mole^{-2}$ $lit^{-2}$ $time^{-1}$
b.
$mole^{-2}$ $lit^{2}$ $time^{-1}$
c.
$mole^{-2}$ $lit^{2}$ time
d.
$mole^{2}$ $lit^{-2}$ $time^{-1}$
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The unit of rate constant for 5/2 order chemical reaction
a.
$(dm^{3})^(3/2$) mol^(-3/2) $s^{-1}$
b.
$(dm^(3/2))^{3}$ mol^(3/2) s
c.
$(dm^{3})^(3/2$) mol^(3/2) $s^{-1}$
d.
$(dm^(3/2))^{3}$ mol^(-3/2) s
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For a reaction A -> products, a graph of [A] versus Time is found to be a straight line. What is the order of this reaction?
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Iodination of acetone in Acid medium is zero order with respect to
CH3COCH3 + I2 -> ICH2-CO-CH3 + HI
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The rate constant is
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Species that are formed in one step of reaction mechanism and used up in another step are called
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Match $t_{1}/2$ value given in Column I with their respective order of the reaction given in Column II:
Column I:
(a) $t_{1}/2$ ∝ a
(b) $t_{1}/2$ is constant
(c) $t_{1}/2$ ∝ $1/a^{2}$
(d) $t_{1}/2$ ∝ 1/a
Column II:
1. Third order
2. Second order
3. Zero order
4. First order
a.
(a)-2, (b)-3, (c)-4, (d)-1
b.
(a)-3, (b)-4, (c)-1, (d)-2
c.
(a)-3, (b)-1, (c)-2, (d)-4
d.
(a)-4, (b)-1, (c)-2, (d)-3
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Choose the correct match among the following type:
(1) The name catalyst was given by - Berzelius
(2) Catalysts - Increases the equilibrium concentration of the products
(3) Arrhenius equation - k $=$ A.e^(-Ea/RT)
(4) Second order reaction - 2NO(g) + O2(g) -> 2NO2(g)
a.
(1) and (2) are correct
b.
(2) and (4) are correct
c.
(1) and (3) are correct
d.
(2) and (3) are correct
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For a first order reaction, the unit of the rate constant is
a.
$mol^{1}$ $L^{-1}$ $s^{-1}$
b.
$mol^{-1}$ $L^{1}$ $s^{-1}$
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Mention which three factors affect the rate of a chemical reaction
a.
Temperature, pressure and humidity
b.
Temperature, Reactant concentration and catalyst
c.
Temperature, Reactant concentration and pressure
d.
Temperature, product concentration and container volume
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Plots showing the variation of the rate constant (K) with temperature (T) are given below. The plot that follows Arrhenius equation is,
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Choose the correct statement about IR spectroscopy
a.
Intermolecular hydrogen bonds gives sharp bands and intramolecular hydrogen bands gives broad bands
b.
Aldehydes absorb at lower wavenumber than ketones
c.
When the compound is meta substituted, inductive effect is considered as important
d.
A molecule transfers its energy from fundamental to overtone and back again is called field effect
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Raman effect is
c.
Elastic scattering of light
d.
Inelastic scattering of light
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Which of the following solvents cannot be used in 1H-NMR spectroscopy
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How many PMR signals were obtained for the compound neopentane?
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In 1H-NMR a proton exposed to an external magnetic force 1.41 T will precess with ν ≈ 60 MHz. T is a measure of,
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The selection rule for the rotational Raman Spectra of a linear molecule is
c.
$ΔJ$ $=$ 0, $±1$, $±2$
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The most widely used radiation source in Atomic Absorption Spectroscopy
(I) Hollow Cathode lamp
(II) Hydrogen discharge lamp
(III) Electrodeless Discharge lamp
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Identify the correct statements:
(a) Intensity of stoke's lines is greater than anti-stoke's lines
(b) Stoke's lines have higher wavelength than incident light
(c) For anti-stoke's lines $Δν$ is positive
(d) In Raman spectra water can be used as a solvent
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In which region, NMR spectra are observed
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Nuclei with an even number of protons and neutrons have
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A compound shows a proton NMR peak at 240 Hz down field from the TMS peak in a spectrometer operating at 60 MHz. The chemical shift value in terms of τ (Tau) scale
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Metallic elements in biological materials and food industry can be detected using
b.
Atomic Absorption Spectroscopy
d.
Ultraviolet Spectroscopy
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In gene-gun technology, the bullet is made up of
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To enhance collagen and calcium deposition by bone cells, nanoparticles of titanium, iron oxide is given along with the minerals of ________ nanoparticles.
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PESTM is standard form of
a.
Polymeric Emission Scanning Tunelling Microscopy
b.
Photo Emission Simple Tunelling Microscopy
c.
Photo Emission Scanning Tunelling Microscopy
d.
Photo Excitation Scanning Electron Microscopy
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Choose the correct answer:
(i) The size of nanomaterials should be always less than 100 nm
(ii) Nanomaterials should have single molecular weight and molecular formula
(iii) Nanomaterials, atleast one of the dimension is between 1 nm and 100 nm
(iv) In nanomaterials atoms are held together by chemical bonds
a.
(i) is correct; (ii), (iii) and (iv) are wrong
b.
(iii) and (iv) are correct; (i) and (ii) are wrong
c.
(i) and (iii) are correct; (ii) and (iv) are wrong
d.
(ii) is correct; (i), (iii) and (iv) are wrong
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Nanoscience is the study of structures and molecules on the scales of nanometers ranging between 1 and 100 nm with
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Chloroquine is used in the treatment of which of the following diseases?
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Chemical name of Dettol is
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Mention the study of the Toxic effects of chemicals on living organism.
b.
Pharmaceutical Chemistry
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The Structural unit and functional group of a drug, responsible for its physiological effect is called as the
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Assertion [A]: Penicillin - G is an antihistamine.
Reason [R]: Penicillin G is effective against some gram positive bacteria.
a.
[A] and [R] are correct and [R] is correct explanation of [A]
b.
[A] and [R] both are correct but [R] does not explain [A]
c.
[A] is correct but [R] is incorrect
d.
[A] is incorrect but [R] is correct
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The site of application of a intramuscular injection is massaged in order to
c.
Increase the absorption surface
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Among the following, the most effective antibiotic against both Gram-positive as well as gram-negative bacteria is
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Which among the following is not an antacid drug?
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The efficiency of a general anaesthetic is directly proportional to its affinity to a class of biomolecules in the central nervous system. These biomolecules are
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The absorption of Iron from the gastrointestinal tract is enhanced by the presence of
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The failure of blood clotting is due to the deficiency of ________ vitamin.
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Which of the following hormones is responsible for the increase of blood glucose level?
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Which one of the following is a conjugated protein?
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Match the following based on R-group:
(a) Pro 1. Guanidine group
(b) Ser 2. Secondary amino group
(c) Lys 3. Amino group
(d) Arg 4. Hydroxy group
a.
(a)-2, (b)-4, (c)-3, (d)-1
b.
(a)-1, (b)-4, (c)-3, (d)-2
c.
(a)-3, (b)-1, (c)-4, (d)-2
d.
(a)-4, (b)-1, (c)-3, (d)-2
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An Epimer of D-(+)-glucose is ________ and that differs in the configuration of which asymmetric carbon atom.
d.
D-(+)-Galactose and C-2
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Which of the following isotope used in the treatment of thyroid complaints?
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Compare the following Nuclear reaction:
A:
(a) $3Li^{6}$ -> $2He^{4}$
(b) $15P^{31}$ -> $15P^{32}$
(c) $6C^{12}$ -> $7N^{13}$
(d) $3Li^{7}$ -> $3Li^{6}$
B:
1. (D, n)
2. (D, T)
3. (D, $α$)
4. (D, p)
a.
(a)-3, (b)-4, (c)-1, (d)-2
b.
(a)-4, (b)-1, (c)-2, (d)-3
c.
(a)-2, (b)-1, (c)-4, (d)-3
d.
(a)-3, (b)-2, (c)-4, (d)-1
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Match the following:
Elements:
(a) Chlorine
(b) Oxygen
(c) Sodium
(d) Sulphur
Number of Isotopes:
1. 1
2. 2
3. 4
4. 3
a.
(a)-2, (b)-1, (c)-3, (d)-4
b.
(a)-2, (b)-4, (c)-1, (d)-3
c.
(a)-4, (b)-2, (c)-3, (d)-1
d.
(a)-1, (b)-3, (c)-4, (d)-2
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$90Th^{234}$ successively emitted two $β-particles$ and one $α-particle$ to form
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The sodium isotope used to analyze the blood circulation in human body is
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In living organism, the $C^{14}$ concentration
a.
Remains approximately constant
d.
Increases and then decreases
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How many $α$ and $β$ particles are emitted in the following radioactive decay?
$90Th^{232}$ -> $82Pb^{208}$
a.
$α$ $=$ 4 and $β$ $=$ 6
b.
$α$ $=$ 6 and $β$ $=$ 4
c.
$α$ $=$ 6 and $β$ $=$ 2
d.
$α$ $=$ 2 and $β$ $=$ 6
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Which one of the following nuclides is most likely to decay by positron $(β+$) emission is
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When a radioactive nucleus decays, it emits one alpha particle and two beta particles. The daughter nucleus is ________ of the parent nucleus.
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The mass number A is given by (Z is atomic number and N is number of neutrons)
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Match the following:
(a) $6C^{14}$ and $7N^{15}$ 1. Isobars
(b) $19K^{40}$ and $20Ca^{40}$ 2. Isotopes
(c) $17Cl^{35}$ and $17Cl^{37}$ 3. Isotones
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$3Li^{8}$ decays to $4Be^{8}$, the type of decay is
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Choose the correct answer:
(1) 1 a.m.u. - 931.5 MeV
(2) Double magic nuclei - 208Pb
(3) Fissionable nuclei - 238U
(4) Non-fissionable nuclei - 235U
a.
(1) and (2) are correct
b.
(1) and (3) are correct
c.
(2) and (3) are correct
d.
(3) and (4) are correct
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Identify the Trans uranium element 'X':
$94Pu^{241}$ -> 'X' + $-1e^{0}$
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Neodymium Oxide when dissolved in Selenium oxychloride, the substance obtained is used as
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Match the following:
Cations:
(a) $Pm^{3+}$
(b) $Tm^{3+}$
(c) $Er^{3+}$
(d) $La^{3+}$
Colour:
1. Colorless
2. Pink
3. Yellow green
4. Pale green
a.
(a)-1, (b)-2, (c)-3, (d)-4
b.
(a)-4, (b)-3, (c)-1, (d)-2
c.
(a)-3, (b)-4, (c)-2, (d)-1
d.
(a)-1, (b)-2, (c)-4, (d)-3
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In the lanthanides, ________ ion firmly attached with resins.
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Atomic number of actinides are from
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Assertion [A]: The most stable oxidation state of Lanthanide ion are +3. But $Ce^{4+}$, $Eu^{2+}$, $Tb^{4+}$, $Yb^{2+}$ are also found.
Reason [R]: A half-filled 'f' shell and a completely filled 'f' shell are the reason for the Lanthanides to show +2 and +4 oxidation states.
a.
[A] and [R] are correct
b.
[A] is correct but [R] is not the correct explanation
c.
[A] is incorrect and [R] is correct
d.
[A] and [R] are incorrect
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Choose the correct answer. Calculated magnetic moment value of $Nd^{3+}$ [g $=$ 8/11]
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Which of the following is not an electrophile?
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The order of reactivity of alkyl halides in E2 reaction is
a.
Alkyl fluorides > alkyl chlorides > alkyl bromide > Alkyl iodides
b.
Alkyl iodides > Alkyl Bromide > Alkyl chloride > alkyl fluorides
c.
Alkyl chlorides > Alkyl Bromide > Alkyl fluoride > alkyl iodides
d.
Alkyl bromide > Alkyl iodides > Alkyl chlorides > alkyl fluorides
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Electrophile is
a.
Electron - rich and donates an electron pair
b.
Electron deficient and accepts an electron pair
c.
Electron - rich and accepts an electron pair
d.
Electron - deficient and negative ion
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Match the following:
(a) Carbocation 1. Species that can supply a pair of electrons
(b) Nucleophile 2. Species that can receive a pair of electrons
(c) Electrophile 3. Pyramidal
(d) Carbanion 4. Trigonal planar
a.
(a)-2&4, (b)-1, (c)-2, (d)-3
b.
(a)-3, (b)-2, (c)-1, (d)-4
c.
(a)-4, (b)-2, (c)-3, (d)-1
d.
(a)-2, (b)-1, (c)-3, (d)-4
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The reagent needed to convert cyclopentanone to lactone
a.
F3C-COOH [Trifluoroacetic acid]
b.
C6H5-COOH [Benzoic acid]
c.
F3C-COOOH [Trifluoroperacetic acid]
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Identify the product of the following reaction $CH3-CH=CH2$ + HBr ->
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The correct increasing order of free radical stability
a.
$CH2=CH-CH2•$ < RCH2• < R2CH• < R3C•
b.
$CH2=CH-CH2•$ < R3C• < R2CH• < RCH2•
c.
RCH2• < R2CH• < R3C• < $CH2=CH-CH2•$
d.
RCH2• < R2CH• < $CH2=CH-CH2•$ < R3C•
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Heterolytic cleavage of a C-C bond leads to the formation of
d.
Carbonium ion and carbanion
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Match the following:
Molecules:
(a) Methane
(b) Ethane
(c) Ethylene
(d) Acetylene
No. of bonds:
1. 5 sigma 1 pi
2. 4 sigma 0 pi
3. 3 sigma 2 pi
4. 7 sigma 0 pi
a.
(a)-2, (b)-4, (c)-1, (d)-3
b.
(a)-2, (b)-1, (c)-4, (d)-3
c.
(a)-4, (b)-1, (c)-3, (d)-2
d.
(a)-1, (b)-3, (c)-4, (d)-2
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Carbon-carbon double bond consists of
a.
One σ bond and one π bond
d.
One σ bond and two π bonds
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Predict the increasing order of bond length of the following:
C-H, C-C, $C=C$, C≡C
a.
C-H < C≡C < $C=C$ < C-C
b.
C-H < C-C < $C=C$ < C≡C
c.
C-C < $C=C$ < C≡C < C-H
d.
C-C < C-H < $C=C$ < C≡C
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The type of hybridisation of boron in diborane is
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Which of the following hybridisations has the highest bond angle?
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Indicate the type of hybridization of carbon in formaldehyde molecule
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The hybridisation of carbon atom in a carbon free radical is
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Choose the most stable free radicals among the following:
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The correct representation involving heterolytic fission of CH3-Br among the following is:
(1) CH3-Br -> CH3• + Br•
(2) CH3 -↷ Br -> $CH3^{+}$ + Br^-
(3) CH3 ↶- Br -> CH3^- + $Br^{+}$
(4) CH3 ⥬ Br -> CH3• + Br•
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Which of the following carbocation will be most stable?
(1) $CH3-CH2^{+}$
(2) $CH3-CH^{+}-CH3$
(3) $CH3^{+}$
(4) $CH2=CH-CH2^{+}$
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Compound undergoing homolytic bond cleavage will lead to formation of which chemical species
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Organics which give:
1. Stable carbanions are not nucleophilic in nature
2. Stable carbocations are not electrophilic in nature
3. Stable free radicals are not neutral and unreactive in nature
4. All the above statements are wrong
Find out the correct statement:
a.
(i) and (ii) are wrong, (iii) is correct
b.
(i) and (ii) are correct, (iii) is wrong
c.
(i) and (iii) are correct, (ii) is wrong
d.
(iv) All the above statements are wrong
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For the formation of new compounds by carbon-carbon bond formation, carbocations should react with
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Which of the following is used in welding and cutting of metals?
(1) Benzene
(2) Ethyl alcohol
(3) Acetylene
(4) Cyclohexane
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Which of the following carbonium ion is most stable?
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In 2-pentene molecule ________ number of σ and π bonds are present.
a.
Eight σ bonds and one π bond
b.
Fourteen σ bonds and one π bond
c.
Ten σ bonds and two π bonds
d.
Six σ bonds and two π bonds
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Which of the following is responsible for Cis and Trans isomerism in alkenes?
a.
Rotation of atoms is possible around σ bond
b.
Rotation of atoms is not possible around π bond
c.
π bonds are not easily broken
d.
Loosely held a pair of electrons in a σ bond
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In B2H6
a.
The B-H bonds are ionic
b.
There is direct boron-boron bond
c.
It is iso structural to C2H6
d.
Boron atoms are linked through hydrogen bridges
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Mention the example of man made silicate
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Which of the following statements are correct?
(i) Borazine is called as inorganic benzene
(ii) Borazine can be prepared from diborane
(iii) Borazine is less reactive than benzene
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Identify which of the following molecule is more ionic based on Pauling Scale
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Arrange the following compounds in the expected order of increasing melting point:
BaF2, BaCl2, BaBr2 and BaI2
a.
BaI2 < BaBr2 < BaCl2 < BaF2
b.
BaF2 < BaCl2 < BaBr2 < BaI2
c.
BaCl2 < BaF2 < BaBr2 < BaI2
d.
BaCl2 < BaF2 < BaI2 < BaBr2
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The factors affecting the magnitude of polarising power of a cation and polarisability of an anion are studied by using
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Compare the elements with its Group in the periodic table:
Group:
(a) III A
(b) IV A
(c) V A
(d) VI A
Element:
1. Pb
2. As
3. Te
4. Ga
a.
(a)-4, (b)-3, (c)-2, (d)-1
b.
(a)-3, (b)-2, (c)-1, (d)-4
c.
(a)-4, (b)-1, (c)-2, (d)-3
d.
(a)-1, (b)-2, (c)-4, (d)-3
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For the reaction: S^-(g) + e^- -> $S^{2}-(g$), its electron affinity is
d.
Both S^-(g) and $S^{2}-(g$) are same
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Which of the following element behave both like alkali metals and halogens?
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In the periodic table elements of Group IA, its atomic radius and ionisation potential are ________ respectively.
a.
Increases and Decreases
b.
Increases and Increases
c.
Decreases and Increases
d.
Decreases and Decreases
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In Carborundum (Si-C) bond distance is 1.93 Å and covalent radii of C is 0.77 Å. What is the covalent radii of Si?
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Which of the Non-metals is Weakest Oxidising agent?
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An atom has 2 electrons in K shell, 8 electrons in L shell and 5 electrons in M shell. What is the total number of electrons in the p orbital?
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The valence shell electronic configuration of an element is $(n-1)d^{1}$ $ns^{2}$, if n $=$ 5. Find the element:
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Identify the correct statements:
(a) Ionisation Energy increases from left to right in a period
(b) Ionisation Energy of Cs is lower than K
(c) Electron affinity of N is -50 KJ $mol^{-1}$
(d) Electron affinity of P is -72 KJ $mol^{-1}$
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The colour of the compound become colourless if the percentage of ionic character of a bond is
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In modern periodic table, the elements are arranged in ________ order.
c.
Increasing atomic weight
d.
Increasing atomic number
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The property of an atom in a covalent molecule to attract the shared pair of electrons towards itself is called
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Which of the following ion pairs are iso-electronic?
a.
$Si^{4+}$ and $Mg^{2+}$
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Match the following:
Type of Elements:
(a) Inert Gas Elements
(b) Main Group Elements
(c) Transition Elements
(d) Inner Transition Elements
Electronic Configuration:
1. $ns^{1}$ to $ns^{2}$ $np^{6}$
2. $ns^{2}$ $np^{6}$
3. $(n-2)f^{1}-14$ $(n-1)d^{0}-1$ $ns^{2}$
4. $(n-1)d^{1}-10$ $ns^{1}-2$
a.
(a)-4, (b)-2, (c)-1, (d)-3
b.
(a)-2, (b)-1, (c)-4, (d)-3
c.
(a)-1, (b)-2, (c)-3, (d)-4
d.
(a)-4, (b)-3, (c)-2, (d)-1
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