Question 1

Q1. The rate of a chemical reaction is defined as:

Accepted Answer

Option B: Change in concentration of reactant or product per unit time. Rate of reaction is change in concentration of reactants/products per unit time.

Question 2

Q2. Which of the following shows the highest van't Hoff factor (ideal case)?

Accepted Answer

Option D: Al ₂ (SO ₄ ) ₃. Al ₂ (SO ₄ ) ₃ dissociates into 5 ions (2Al³ ⁺ + 3SO ₄ ² ⁻ ).

Question 3

Q3. In crystal field theory, strong field ligands cause:

Accepted Answer

Option C: Low spin complexes. Strong field ligands increase Δ o leading to electron pairing.

Question 4

Q4. The strongest reducing agent among halides is:

Accepted Answer

Option D: I ⁻. I ⁻ easily loses electrons due to large size and weak bond.

Question 5

Q5. Which polymer is used in making non-stick cookware coating?

Accepted Answer

Option C: Teflon. Teflon (PTFE) is heat resistant and non-reactive.

Question 6

Q6. A first-order reaction has rate constant k. Its half-life is:

Accepted Answer

Option B: 0.693/k. For first-order reaction, t1/2 = 0.693/k.

Question 7

Q7. Conductivity of solution increases with dilution because:

Accepted Answer

Option B: ion mobility increases. Reduced interionic attraction increases ion mobility.

Question 8

Q8. Which complex shows optical isomerism?

Accepted Answer

Option B: [Cr(en)3]3+. Chelate complex with en shows chirality.

Question 9

Q9. Hydrogen bonding is strongest in:

Accepted Answer

Option C: HF. Fluorine has highest electronegativity.

Question 10

Q10. Oxidation state of Mn in KMnO ₄ :

Accepted Answer

Option D: +7. K(+1) + Mn + 4(-2) = 0 → Mn = +7.

Question 11

Q11. Rusting of iron is:

Accepted Answer

Option B: Oxidation process. Iron gets oxidized in presence of oxygen and water.

Question 12

Q12. Which drug is an analgesic?

Accepted Answer

Option A: Paracetamol. Paracetamol relieves pain and fever.

Question 13

Q13. Biomagnification is highest at:

Accepted Answer

Option D: Tertiary consumers. Toxic concentration increases at higher trophic levels.

Question 14

Q14. Assertion (A): Molecularity is always a whole number. Reason (R): It is determined from elementary reaction step.

Accepted Answer

Option A: Both true and R explains A. Molecularity is defined for elementary steps only.

Question 15

Q15. Assertion (A): Catalyst changes equilibrium constant. Reason (R): Catalyst lowers activation energy equally for forward and reverse reactions.

Accepted Answer

Option B: A false R true. Catalyst does not change equilibrium constant.

Question 16

Q16. Case Study: A student observes faster reaction at higher temperature. Reason:

Accepted Answer

Option B: more energetic collisions. Higher temperature increases kinetic energy.

Question 17

Q17. Case Study: Addition of electrolyte increases boiling point elevation. Reason:

Accepted Answer

Option B: more particles. More ions increase colligative effect.

Question 18

Q18. Highest conductivity is shown by:

Accepted Answer

Option C: HCl. HCl is a strong electrolyte.

Question 19

Q19. Half-life of first-order reaction depends on:

Accepted Answer

Option B: temperature. It depends only on rate constant.

Question 20

Q20. Strongest intermolecular force exists in:

Accepted Answer

Option B: NH3. NH3 shows hydrogen bonding.

Mock Test 08 Performance Solutions

Detailed Question Analysis

Q1. The rate of a chemical reaction is defined as:

Q2. Which of the following shows the highest van't Hoff factor (ideal case)?

Q3. In crystal field theory, strong field ligands cause:

Q4. The strongest reducing agent among halides is:

Q5. Which polymer is used in making non-stick cookware coating?

Q6. A first-order reaction has rate constant k. Its half-life is:

Q7. Conductivity of solution increases with dilution because:

Q8. Which complex shows optical isomerism?

Q9. Hydrogen bonding is strongest in:

Q10. Oxidation state of Mn in KMnO 4 :

Q11. Rusting of iron is:

Q12. Which drug is an analgesic?

Q13. Biomagnification is highest at:

Q14. Assertion (A): Molecularity is always a whole number. Reason (R): It is determined from elementary reaction step.

Q15. Assertion (A): Catalyst changes equilibrium constant. Reason (R): Catalyst lowers activation energy equally for forward and reverse reactions.

Q16. Case Study: A student observes faster reaction at higher temperature. Reason:

Q17. Case Study: Addition of electrolyte increases boiling point elevation. Reason:

Q18. Highest conductivity is shown by:

Q19. Half-life of first-order reaction depends on:

Q20. Strongest intermolecular force exists in:

ExamSpark Quick Chemistry Revision Signals

Quick Links & ExamSpark Resources

Mock Test 08 Performance Solutions

Detailed Question Analysis

Q1. The rate of a chemical reaction is defined as:

Q2. Which of the following shows the highest van't Hoff factor (ideal case)?

Q3. In crystal field theory, strong field ligands cause:

Q4. The strongest reducing agent among halides is:

Q5. Which polymer is used in making non-stick cookware coating?

Q6. A first-order reaction has rate constant k. Its half-life is:

Q7. Conductivity of solution increases with dilution because:

Q8. Which complex shows optical isomerism?

Q9. Hydrogen bonding is strongest in:

Q10. Oxidation state of Mn in KMnO 4 :

Q11. Rusting of iron is:

Q12. Which drug is an analgesic?

Q13. Biomagnification is highest at:

Q14. Assertion (A): Molecularity is always a whole number. Reason (R): It is determined from elementary reaction step.

Q15. Assertion (A): Catalyst changes equilibrium constant. Reason (R): Catalyst lowers activation energy equally for forward and reverse reactions.

Q16. Case Study: A student observes faster reaction at higher temperature. Reason:

Q17. Case Study: Addition of electrolyte increases boiling point elevation. Reason:

Q18. Highest conductivity is shown by:

Q19. Half-life of first-order reaction depends on:

Q20. Strongest intermolecular force exists in:

ExamSpark Quick Chemistry Revision Signals

Quick Links & ExamSpark Resources

Related Study Links