Nucleic acids, proteins, and polysaccharides are polymers of nucleotides, amino acids, and monosaccharides respectively. Lipids are esters of fatty acids and alcohol, not polymers.
Q136mcq
The equilibrium constants are: N2 + 3H2 <-> 2NH3 (K1), N2 + O2 <-> 2NO (K2), H2 + 1/2O2 <-> H2O (K3). The equilibrium constant (K) of the reaction 2NH3 + 5/2O2 <-> 2NO + 3H2O will be
a.
(K2 * K3^3) / K1
b.
(K1 * K3^3) / K2
c.
(K2 * K3^3) / K1
Correct Answer
d.
(K2 * K3) / K1
Step-by-Step AI Explanation
Verified Method
By manipulating the given equations: (Equation II) + 3 * (Equation III) - (Equation I) yields the target reaction, so K = (K2 * K3^3) / K1.
Q137mcq
The heating of phenyl-methyl ethers with HI produces.
a.
Benzene
b.
Ethyl chlorides
c.
Iodobenzene
d.
Phenol
Correct Answer
Step-by-Step AI Explanation
Verified Method
Cleavage of anisole (phenyl-methyl ether) with HI produces phenol and methyl iodide.
Q138mcq
The most suitable method of separation of 1 : 1 mixture of ortho and para-nitrophenols is
a.
Steam distillation
Correct Answer
b.
Sublimation
c.
Chromatography
d.
Crystallisation
Step-by-Step AI Explanation
Verified Method
Ortho-nitrophenol has intramolecular hydrogen bonding and is steam volatile, whereas para-nitrophenol has intermolecular hydrogen bonding, making steam distillation effective for separation.
Q139mcq
Predict the correct intermediate and product in the following reaction: CH3-C ≡ CH + H2O, H2SO4, HgSO4 -> intermediate -> product
a.
A : CH3-C(OH)=CH2, B : CH3-CO-CH3
Correct Answer
b.
A : CH3-C(SO4)=CH2, B : CH3-CO-CH3
c.
A : CH3-C(OH)=CH2, B : CH3-CH2-SO4
d.
A : CH3-CO-CH3, B : CH3-C ≡ CH
Step-by-Step AI Explanation
Verified Method
Hydration of propyne in the presence of HgSO4/H2SO4 forms an enol intermediate (propen-2-ol) which tautomerizes to acetone (propanone).
Q140mcq
Which of the following reactions is appropriate for converting acetamide to methanamine?
a.
Gabriels phthalimide synthesis
b.
Carbylamine reaction
c.
Hoffmann hypobromamide reaction
Correct Answer
d.
Stephens reaction
Step-by-Step AI Explanation
Verified Method
Hoffmann bromamide degradation converts an amide to a primary amine with one carbon atom less.
Q141mcq
The IUPAC name of the compound H-C(=O)-CH(CH3)-C(=O)-CH=CH-CH3 is ________.
a.
3-keto-2-methylhex-5-enal
b.
3-keto-2-methylhex-4-enal
Correct Answer
c.
5-formylhex-2-en-3-one
d.
5-methyl-4-oxohex-2-en-5-al
Step-by-Step AI Explanation
Verified Method
Aldehydes have higher priority than ketones and alkenes, so the carbon chain is numbered starting from the aldehyde carbon.
Q141mcq
The IUPAC name of the compound H3C-CO-CH(CH3)-CH=CH-CHO is ________.
a.
3-keto-2-methylhex-5-enal
b.
3-keto-2-methylhex-4-enal
Correct Answer
c.
5-formylhex-2-en-3-one
d.
5-methyl-4-oxohex-2-en-5-al
Step-by-Step AI Explanation
Verified Method
Aldehydes have higher priority than ketones and alkenes in the numbering of the principal carbon chain. The chain is numbered starting from the aldehyde carbon, leading to 3-keto-2-methylhex-4-enal.
Q143mcq
Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating?
a.
Bicyclic ketone product
b.
Cyclohexanol derivative
c.
Dicyclohexenyl ketone derivative
Correct Answer
d.
Cyclohexyl alcohol
Step-by-Step AI Explanation
Verified Method
Aldol condensation of cyclohexanone followed by dehydration leads to the formation of an alpha,beta-unsaturated carbonyl compound linking two cyclohexane rings.
Q143mcq
Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating?
a.
Dimer structure O=C(cyclohexyl)-cyclohexene
b.
Hydroxy-ketone derivative
c.
An α,β-unsaturated ketone formed by dehydration of the aldol product
Correct Answer
d.
Cyclohexanol derivative
Step-by-Step AI Explanation
Verified Method
Aldol condensation of cyclohexanone followed by heating results in the dehydration of the intermediate aldol product to form an α,β-unsaturated carbonyl compound.
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Consider the reactions: Ethanol (X) treated with Cu/573 K gives A. A gives a positive silver mirror test. A undergoes aldol condensation to give Y. A reacts with semicarbazide to give Z. Identify A, X, Y and Z.
Match the interhalogen compounds of column I with the geometry in column II and assign the correct code: Column I (a) XX', (b) XX'3, (c) XX'5, (d) XX'7; Column II (i) T-shape, (ii) Pentagonal bipyramidal, (iii) Linear, (iv) Square-pyramidal, (v) Tetrahedral.
a.
(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
b.
(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
c.
(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
d.
(a)-(v), (b)-(iv), (c)-(iii), (d)-(ii)
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A gas is allowed to expand in a well insulated container against a constant external pressure of 2.5 atm from an initial volume of 2.50 L to a final volume of 4.50 L. The change in internal energy ΔU of the gas in joules will be
a.
+505 J
b.
1136.25 J
c.
–500 J
d.
–505 J
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A 20 litre container at 400 K contains CO2 (g) at pressure 0.4 atm and an excess of SrO (neglect the volume of solid SrO). The volume of the containers is now decreased by moving the movable piston fitted in the container. The maximum volume of the container, when pressure of CO2 attains its maximum value, will be (Given that: SrCO3(s) ⇌ SrO(s) + CO2(g), Kp = 1.6 atm)
a.
2 litre
b.
5 litre
c.
10 litre
d.
4 litre
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A 20 litre container at 400 K contains CO2(g) at pressure 0.4 atm and an excess of SrO. The volume of the containers is now decreased by moving the movable piston fitted in the container. The maximum volume of the container, when pressure of CO2 attains its maximum value, will be (Given that: SrCO3(s) ⇌ SrO(s) + CO2(g), Kp = 1.6 atm)
a.
2 litre
b.
5 litre
c.
10 litre
d.
4 litre
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Mechanism of a hypothetical reaction X2 + Y2 -> 2XY is given below: (i) X2 ⇌ X + X (fast) (ii) X + Y2 -> XY + Y (slow) (iii) X + Y -> XY (fast) The overall order of the reaction will be
a.
1.5
b.
1
c.
2
d.
0
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For a given reaction, ΔH = 35.5 kJ mol–1 and ΔS = 83.6 JK–1 mol–1. The reaction is spontaneous at : (Assume that ΔH and ΔS do not vary with temperature)
a.
T > 298 K
b.
T < 425 K
c.
T > 425 K
d.
All temperatures
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The correct order of the stoichiometries of AgCl formed when AgNO3 in excess is treated with the complexes: CoCl3·6NH3, CoCl3·5NH3, CoCl3·4NH3 respectively is
a.
2 AgCl, 3 AgCl, 1 AgCl
b.
1 AgCl, 3 AgCl, 2 AgCl
c.
3 AgCl, 1 AgCl, 2 AgCl
d.
3 AgCl, 2 AgCl, 1 AgCl
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In the electrochemical cell Zn|ZnSO₄(0.01M)||CuSO₄(1.0 M)|Cu, the emf of this Daniel cell is E₁. When the concentration of ZnSO₄ is changed to 1.0 M and that of CuSO₄ changed to 0.01 M, the emf changes to E₂. From the following, which one is the relationship between E₁ and E₂? (Given, RT/F = 0.059)
a.
E₂ = 0 ≠ E₁
b.
E₁ = E₂
c.
E₁ < E₂
d.
E₁ > E₂
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