NCERT Solutions For Class 12 Chemistry Chapter 4: Chemical Kinetics

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NCERT Solutions for Class 12 Chemistry Chapter 4 Chemical Kinetics deals with the study of the rate of reaction and variables that affect chemical reactions. Some of the important topics covered in this chapter are as follows:

Expected no. of questions: 2 to 4 questions of 7 marks.

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NCERT Solutions for Class 12 Chemistry Chapter 4

The NCERT Solutions for Class 12 Chemistry Chapter 4 Chemical Kinetics is as given below.

Class 12 Chemistry Chapter 4 Chemical Kinetics – Important Topics

Chemical kinetics deals with the rate of chemical reactions. A chemical reaction is a process in which one or more reactants are converted to one or more products. Rate of reaction is the rate at which the concentration of either reactants or products gets increased or decreased.

Rate = K[A]^x [B]^y

Arrhenius equation established the relation between temperature and rate constant.

Arrhenius Equation k = Ae^-Ea/RT

Half life of a reaction is the time taken by the reactants to reduce its concentration to half compared to its initial concentration.

Half Life T_½ = 0.693/k

Order of Reaction is the sum of powers of the exponent in the rate equation. There are 3 orders of reaction, namely,

Zero order reaction
First order reaction
Second order reaction
Pseudo first order reaction

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CBSE CLASS XII Related Questions

1.
Half-life ($ t_{1/2} $) of a first order reaction is 1386 s. The value of rate constant is:
- $0.5 \times 10^{-4} \, \text{s}^{-1}$
- $5.0 \times 10^{-4} \, \text{s}^{-1}$
- $0.5 \times 10^{-5} \, \text{s}^{-1}$
- $0.5 \times 10^{-3} \, \text{s}^{-1}$
View Solution
2.
How many Faradays are required to reduce 1 mol of $Cr_2O_7^{2-}$ to $Cr^{3+}$ in acidic medium ?
- 2
- 3
- 6
- 4
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3.
Answer the following: (I) Which isomer of C$_4$H$_9$Br is most reactive towards S$_N$1 reaction? (II) Predict the alkene that would be formed by dehydrohalogenation of 1-Bromo-1-methylcyclohexane. (III) Although chlorine shows strong $-I$ effect, yet it is ortho/para-directing in electrophilic aromatic substitution reactions. Why? (ii) Write the major product in the following reactions: (I)
(II)
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4.
According to Werner's theory, the primary valencies of the central metal atom :
- are satisfied by neutral molecules or negative ions.
- are equal to its coordination number.
- are satisfied by negative ions.
- are non-ionisable.
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5.
(I) Which of the following is more reactive towards S$_N$1 reaction: 2-Bromo-2-methylbutane or 1-Bromopentane (II) What type of halide is present in the following compound: \[ \begin{array}{c} CH_3-CH-C=CH_2\\ |\\ CH_3 \end{array} \] \[ | \] \[ Cl \] (III) Why is chloroform stored in dark coloured bottles? (ii) Define the following terms: (I) Ambident Nucleophiles (II) Racemic mixture
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6.
Why second ionization enthalpies of chromium and copper are exceptionally higher than those of their neighbouring elements?
View Solution