Identify the substances having glycosidic bond and peptide bond, respectively, in their structure:
a.
Glycerol, trypsin
b.
Cellulose, lecithin
c.
Inulin, insulin
Correct Answer
d.
Chitin, cholesterol
Step-by-Step AI Explanation
Verified Method
Inulin is a polysaccharide containing glycosidic bonds, and insulin is a peptide hormone containing peptide bonds.
Q28mcq
Which of the following statements is not correct?
a.
The proinsulin has an extra peptide called C-peptide.
b.
The functional insulin has A and B chains linked together by hydrogen bonds.
Correct Answer
c.
Genetically engineered insulin is produced in E. coli.
d.
In man insulin is synthesised as a proinsulin.
Step-by-Step AI Explanation
Verified Method
The A and B chains of insulin are linked by disulfide bonds, not hydrogen bonds.
Q53mcq
The number of substrate level phosphorylations in one turn of citric acid cycle is:
a.
One
Correct Answer
b.
Two
c.
Three
d.
Zero
Step-by-Step AI Explanation
Verified Method
In one turn of the citric acid cycle, substrate-level phosphorylation occurs once at the succinyl-CoA to succinate step, producing one GTP (or ATP equivalent).
Q58mcq
Identify the basic amino acid from the following.
a.
Glutamic Acid
b.
Lysine
Correct Answer
c.
Valine
d.
Tyrosine
Step-by-Step AI Explanation
Verified Method
Lysine has an extra amino group and is a basic amino acid.
Q106mcq
The energy equivalent of 0.5 g of a substance is:
a.
4.5×10^13 J
Correct Answer
b.
1.5×10^13 J
c.
0.5×10^13 J
d.
4.5×10^16 J
Step-by-Step AI Explanation
Verified Method
Using E = mc^2 = 5×10^-4 × (3×10^8)^2 = 4.5×10^13 J.
Q136mcq
The mixture which shows positive deviation from Raoult’s law is:
a.
Benzene and toluene
b.
Acetone and chloroform
c.
Chloroethane and bromoethane
d.
Ethanol and acetone
Correct Answer
Step-by-Step AI Explanation
Verified Method
Positive deviation occurs when A-B interactions are weaker than A-A and B-B interactions. Ethanol and acetone mixture shows weaker hydrogen-bonding interactions and hence positive deviation.
Q138mcq
The number of Faradays (F) required to produce 20 g of calcium from molten CaCl2 (Atomic mass of Ca = 40 g mol^-1) is:
a.
2
b.
3
c.
4
d.
1
Correct Answer
Step-by-Step AI Explanation
Verified Method
Ca2+ + 2e− → Ca. 40 g Ca requires 2 F, so 20 g requires 1 F.
Q139mcq
Hydrolysis of sucrose is given by the following reaction:
Sucrose + H2O ⇌ Glucose + Fructose
If the equilibrium constant (Kc) is 2 × 10^13 at 300 K, the value of ΔrG° at the same temperature will be:
For a reaction at standard state, ΔrG° = -RT ln Kc. Substituting R = 8.314 J mol^-1 K^-1, T = 300 K, and Kc = 2 × 10^13 gives the required expression.
Q139mcq
Hydrolysis of sucrose is given by the following reaction: Sucrose + H2O ⇌ Glucose + Fructose. If the equilibrium constant (Kc) is 2×10^13 at 300 K, the value of ΔrG° at the same temperature will be:
ΔrG° = -RT ln Kc. Substituting Kc = 2×10^13 gives the expression in option (d).
Q140mcq
For the reaction, 2Cl(g) → Cl2(g), the correct option is:
a.
ΔrH > 0 and ΔrS < 0
b.
ΔrH < 0 and ΔrS > 0
c.
ΔrH < 0 and ΔrS < 0
Correct Answer
d.
ΔrH > 0 and ΔrS > 0
Step-by-Step AI Explanation
Verified Method
Bond formation releases heat, so ΔrH is negative. Also, two gaseous atoms combine to form one gaseous molecule, so randomness decreases and ΔrS is negative.
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The freezing point depression constant (Kf) of benzene is 5.12 K kg mol−1. The freezing point depression for a solution of molality 0.078 m containing a non-electrolyte solute in benzene is (rounded off up to two decimal places):
a.
0.80 K
b.
0.40 K
c.
0.60 K
d.
0.20 K
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The transition metals and their compounds are known for their catalytic activity due to their ability to adopt multiple oxidation states and to form complexes.
b.
Interstitial compounds are those that are formed when small atoms like H, C or N are trapped inside the crystal lattices of metals.
c.
The oxidation states of chromium in CrO4^2− and Cr2O7^2− are not the same.
d.
Cr2+(d4) is a stronger reducing agent than Fe2+(d6) in water.
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Identify the correct statements from the following:
(a) CO2(g) is used as refrigerant for ice-cream and frozen food.
(b) The structure of C60 contains twelve six-membered rings and twenty five carbon rings.
(c) ZSM-5, a type of zeolite, is used to convert alcohols into gasoline.
(d) CO is a colorless and odourless gas.
a.
(a) and (c) only
b.
(b) and (c) only
c.
(c) and (d) only
d.
(a), (b) and (c) only
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A mixture of N2 and Ar gases in a cylinder contains 7 g of N2 and 8 g of Ar. If the total pressure of the mixture of the gases in the cylinder is 27 bar, the partial pressure of N2 is:
a.
12 bar
b.
15 bar
c.
18 bar
d.
9 bar
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A mixture of N2 and Ar gases in a cylinder contains 7 g of N2 and 8 g of Ar. If the total pressure of the mixture of the gases in the cylinder is 27 bar, the partial pressure of N2 is: [Use atomic masses (in g mol−1): N = 14, Ar = 40]
a.
12 bar
b.
15 bar
c.
18 bar
d.
9 bar
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Urea reacts with water to form A which will decompose to form B. B when passed through Cu2+(aq), deep blue colour solution C is formed. What is the formula of C from the following?
a.
[Cu(NH3)4]2+
b.
Cu(OH)2
c.
CuCO3·Cu(OH)2
d.
CuSO4
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Urea reacts with water to form A which will decompose to form B. B when passed through Cu2+(aq), deep blue colour solution C is formed. What is the formula of C from the following?
a.
[Cu(NH3)4]2+
b.
Cu(OH)2
c.
CuCO3·Cu(OH)2
d.
CuSO4
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