Question 1

Q1. The unit of rate constant for a third-order reaction is:

Accepted Answer

Option C: L² mol ⁻ ² s ⁻ ¹. For third-order reactions, unit of rate constant is L² mol ⁻ ² s ⁻ ¹.

Question 2

Q2. Which solution exhibits the greatest colligative effect?

Accepted Answer

Option C: 0.1 M CaCl ₂. CaCl ₂ dissociates into 3 ions, giving highest van't Hoff factor.

Question 3

Q3. In crystal field theory, tetrahedral complexes are:

Accepted Answer

Option A: always high spin. Δ t is small, so pairing energy is not overcome → high spin.

Question 4

Q4. The strongest oxidizing agent among the following is:

Accepted Answer

Option D: F ₂. Fluorine has highest electronegativity and strongest oxidizing power.

Question 5

Q5. Which polymer is used for making bulletproof jackets?

Accepted Answer

Option C: Kevlar. Kevlar has strong intermolecular hydrogen bonding and high tensile strength.

Question 6

Q6. A reaction shows rate proportional to square of concentration. Order is:

Accepted Answer

Option C: 2. Order equals sum of powers in rate law.

Question 7

Q7. Conductivity increases with dilution because:

Accepted Answer

Option B: ions move freely. Reduced interionic attraction increases mobility.

Question 8

Q8. Which complex shows geometrical isomerism?

Accepted Answer

Option B: [Pt(NH3)2Cl2]. Square planar complexes show cis-trans isomerism.

Question 9

Q9. Hydrogen bonding is strongest in:

Accepted Answer

Option A: HF. F is most electronegative, strongest H-bonding.

Question 10

Q10. Oxidation state of Cr in K2Cr2O7 is:

Accepted Answer

Option C: +6. 2Cr + 2(+1) + 7(-2) = 0 → Cr = +6.

Question 11

Q11. Rusting of iron is faster in:

Accepted Answer

Option C: salt water. Electrolytes accelerate corrosion.

Question 12

Q12. Which drug is used as antacid?

Accepted Answer

Option B: Ranitidine. Ranitidine reduces gastric acid secretion.

Question 13

Q13. Biomagnification increases:

Accepted Answer

Option B: upward trophic levels. Toxins accumulate at higher trophic levels.

Question 14

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

Accepted Answer

Option A: Both true and R explains A. Molecularity refers to actual reacting molecules in a step.

Question 15

Q15. Assertion (A): Catalyst changes equilibrium constant. Reason (R): Catalyst speeds up both forward and backward reactions equally.

Accepted Answer

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

Question 16

Q16. Case Study: A student observes faster dissolution of sugar in hot water. Reason:

Accepted Answer

Option B: increased kinetic energy. Higher temperature increases molecular motion.

Question 17

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

Accepted Answer

Option B: more particles. More particles 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. t1/2 depends only on rate constant.

Question 20

Q20. Strongest intermolecular force exists in:

Accepted Answer

Option B: NH3. NH3 exhibits hydrogen bonding.

Mock Test 09 Performance Solutions

Detailed Question Analysis

Q1. The unit of rate constant for a third-order reaction is:

Q2. Which solution exhibits the greatest colligative effect?

Q3. In crystal field theory, tetrahedral complexes are:

Q4. The strongest oxidizing agent among the following is:

Q5. Which polymer is used for making bulletproof jackets?

Q6. A reaction shows rate proportional to square of concentration. Order is:

Q7. Conductivity increases with dilution because:

Q8. Which complex shows geometrical isomerism?

Q9. Hydrogen bonding is strongest in:

Q10. Oxidation state of Cr in \(\mathrm{K_2Cr_2O_7}\) is:

Q11. Rusting of iron is faster in:

Q12. Which drug is used as antacid?

Q13. Biomagnification increases:

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

Q15. Assertion (A): Catalyst changes equilibrium constant. Reason (R): Catalyst speeds up both forward and backward reactions equally.

Q16. Case Study: A student observes faster dissolution of sugar in hot water. 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 09 Performance Solutions

Detailed Question Analysis

Q1. The unit of rate constant for a third-order reaction is:

Q2. Which solution exhibits the greatest colligative effect?

Q3. In crystal field theory, tetrahedral complexes are:

Q4. The strongest oxidizing agent among the following is:

Q5. Which polymer is used for making bulletproof jackets?

Q6. A reaction shows rate proportional to square of concentration. Order is:

Q7. Conductivity increases with dilution because:

Q8. Which complex shows geometrical isomerism?

Q9. Hydrogen bonding is strongest in:

Q10. Oxidation state of Cr in \(\mathrm{K_2Cr_2O_7}\) is:

Q11. Rusting of iron is faster in:

Q12. Which drug is used as antacid?

Q13. Biomagnification increases:

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

Q15. Assertion (A): Catalyst changes equilibrium constant. Reason (R): Catalyst speeds up both forward and backward reactions equally.

Q16. Case Study: A student observes faster dissolution of sugar in hot water. 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