Important Questions Class 12 Chemistry Chapter 6, Download PDF

With the Class 12 board exams approaching, students must focus on Important Questions Class 12  Chemistry Chapter 6  to maximize their scores in Chemistry. Chapter 6 – Chemical Kinetics covers reaction rates, order and molecularity of reactions, rate laws, integrated rate equations, and factors affecting reaction rates, including both theory and numerical problems. 

Similarly, the Haloalkanes and Haloarenes Class 12 Chemistry Important Questions chapter deals with nucleophilic substitution reactions (SN1 and SN2), elimination reactions, optical isomerism, mechanisms, reagents, and applications of halo compounds. 

Practicing these Haloalkanes and Haloarenes Class 12 Important Questions along with Chemical Kinetics questions helps students strengthen conceptual clarity, improve problem-solving speed, and confidently tackle high-mark numerical and theory questions in the Class 12 Chemistry board exam.

Important Questions Class 12  Chemistry Chapter 6 

Below are the Important Questions Class 12 Chemistry Chapter 6. These questions cover all essential topics that are frequently asked in the board exams. Chapter 6 – Chemical Kinetics includes reaction rates, order and molecularity, rate laws, integrated rate equations, and factors affecting reaction rates.

The Haloalkanes and Haloarenes Class 12 Chemistry Important Questions focus on nucleophilic substitution (SN1/SN2), elimination reactions, optical isomerism, reaction mechanisms, reagents, and applications of halo compounds. Practicing these Class 12 Chemistry Haloalkanes and Haloarenes MCQs and other important questions will help students strengthen conceptual understanding, solve numerical problems quickly, and perform confidently in the board exam.

1. You want to prepare CH3 – CH2 – CH2 – Br from CH3 – CH = CH2. What are the reagents you require?

b) C6H5 – CH2 – Cl can be converted to C6H5 – CH2 – OH by boiling with aqueous alkali. However C6H5 – Cl cannot be converted to C6H5 – OH by this method. Explain.

2. Among the following which one is chlorine containing insecticide?

(1) DDT (2) Freon

(3) Phosgene (4) Iodoform

3. i) State Saytzeff rule.

ii) Identify the major and minor products obtained by the reaction between 2–bromobutane and alcoholic KOH.

iii) Write the product obtained by the reaction between 2–bromobutane and aqueous KOH.

iv) 2–Bromobutane exhibit optical isomerism. What is optical isomerism?    

4. Write any two differences between SN1 and SN2 reactions.   

5. Complete the reactions:

(a)    CH3CH2Br  + AgCN → ……………..

(b)    CH3CH2Br   + Na/Dry ether → ……………

6. How can the following conversions be effected?

(i)    Ethanol to Fluoroethane 

(ii)   But–1–ene to But–2–ene 

7. Write the reaction of ethyl bromide with the following reagents

(a) aq. KOH

(b) KCN

(c) AgCN

8. Aryl halides are less reactive towards nucleophilic substitution reactions. Write any two reasons for the less reactivity of aryl halides.  State Saytzeff rule

9. Among the halogen derivatives of ethane, the one which has the highest boiling point

(1) C2H5F (2) C2H5Cl

(3) C2H5I (4) C2H5Br 

10. Observe the given chemical reactions and answer the questions followed :

(i)    Identify A, B and C 

(ii)   Write the name of the reaction II. 

(iii)  In reaction III, if we use aqueous KOH, instead of alcoholic KOH, what will be the product ?

Last-Minute Revision Tips for Chapter 6 Chemical Kinetics

With limited time left before the Class 12 Chemistry board exam, follow these quick strategies to score high in Important Questions Class 12 Chemistry Chapter 6:

• Revise All Formulas Daily: Focus on rate laws, integrated rate equations, half-life expressions, and the relation between order and molecularity.

• Practice Numericals Repeatedly: Most marks come from calculation-based questions on reaction rates, order of reaction, and first/second-order reactions.

• Understand Concepts, Don’t Memorize Blindly: Pay special attention to concepts like pseudo-first-order reactions, factors affecting reaction rates, and the distinction between order and molecularity.

• Solve Previous Year Questions: Numerical patterns often repeat in board exams, making previous papers an essential resource.

• Avoid New Topics: Focus only on revision and strengthening weak areas to maximize scoring potential.

• Time Yourself: Solve numericals under exam conditions to improve speed and accuracy.