Definition, Rate Constant, Rate Law Recommended PYQs (STRICTLY NCERT Based) Chemical Kinetics Chemistry NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers

Q1:

Which of the following expression is correct for the reaction given below?$2 \mathrm{HI}_{(g)} \rightarrow \mathrm{H}_{2(g)}+\mathrm{I}_{2(g)}$

1.	$\dfrac{-\Delta[\mathrm{H}I]}{\Delta t}=\dfrac{2 \Delta\left[\mathrm{H}_2\right]}{\Delta t}$	2.	$\dfrac{-\Delta[\mathrm{HI}]}{\Delta t}=\dfrac{4\Delta\left[\mathrm{I}_2\right]}{\Delta t}$
3.	$\dfrac{-\Delta[\mathrm{HI}]}{\Delta t}=\dfrac{4 \Delta\left[\mathrm{H}_2\right]}{\Delta t}$	4.	$ \dfrac{-\Delta[\mathrm{HI}]}{\Delta t}=\dfrac{\Delta\left[\mathrm{H}_2\right]}{\Delta t}$

Subtopic: Definition, Rate Constant, Rate Law |

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NEET - 2024

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Q2:

For a reaction $3A \rightarrow 2B$
The average rate of appearance of B is given by $\Delta [B] \over \Delta t$.
The correct relation between the average rate of appearance of B with the average rate of disappearance of A is:

1.	$-\Delta [A] \over \Delta t$	2.	$-3\Delta [A] \over 2\Delta t$
3.	$-2\Delta [A] \over 3\Delta t$	4.	$\Delta [A] \over \Delta t$

Subtopic: Definition, Rate Constant, Rate Law |

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NEET - 2023

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Q3:

For the reaction, 2A → B, rates= k[A]². If the concentration of reactant is doubled, then the:

(a)	rate of reaction will be doubled.
(b)	rate constant will remain unchanged, however rate of reaction is directly proportional to the rate constant.
(c)	rate constant will change since the rate of reaction and rate constant are directly proportional to each other.
(d)	rate of reaction will increase by four times.

Identify the set of correct statements & choose the correct answer from the options given below:

1.	(a) and (c) only	2.	(a) and (b) only
3.	(b) and (d) only	4.	(c) and (d) only

Subtopic: Definition, Rate Constant, Rate Law |

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NEET - 2022

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Q4:

For a chemical reaction, 4A + 3B → 6C + 9D
rate of formation of C is 6 × 10^–2 mol L^–1 s^–1 and rate of disappearance of A is 4 × 10^–2 mol L^–1 s^–1. The rate of reaction and amount of B consumed in interval of 10 seconds, respectively will be:

1.	1 × 10^–2 mol L^–1 s^–1 and 30 × 10^–2 mol L^–1
2.	10 × 10^–2 mol L^–1 s^–1 and 10 × 10^–2 mol L^–1
3.	1 × 10^–2 mol L^–1 s^–1 and 10 × 10^–2 mol L^–1
4.	10 × 10^–2 mol L^–1 s^–1 and 30 × 10^–2 mol L^–1

Subtopic: Definition, Rate Constant, Rate Law |

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NEET - 2022

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Q5:

For the chemical reaction $N_{2} (g) + 3 H_{2} (g)$ $⇌$ $2 {NH}_{3} (g)$ the correct option is:

1.	$3 \frac{d [H_{2}]}{dt} = 2 \frac{d [{NH}_{3}]}{dt}$	2.	$- \frac{1}{3} \frac{d [H_{2}]}{dt} = - \frac{1}{2} \frac{d [{NH}_{3}]}{dt}$
3.	$- \frac{d [N_{2}]}{dt} = 2 \frac{d [{NH}_{3}]}{dt}$	4.	$- \frac{d [N_{2}]}{dt} = \frac{1}{2} \frac{d [{NH}_{3}]}{dt}$

Subtopic: Definition, Rate Constant, Rate Law |

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NEET - 2019

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Q6:

The correct statement among the following is:

1.	the rate of a first-order reaction does not depend on reactant concentration; the rate of a second-order reaction does depend on reactant concentrations.
2.	the half-life of a first-order reaction does not depend on [A]_o; the half-life of a second-order reaction does depend on [A]₀
3.	a first-order reaction can be catalyzed; a second-order reaction cannot be catalyzed.
4.	the rate of a first-order reaction does depend on reactant concentrations; the rate of a second-order reaction does not depend on reactant concentrations

Subtopic: Definition, Rate Constant, Rate Law |

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NEET - 2018

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Q7:

Which quantity is altered when a catalyst is introduced during a chemical reaction?

1.	Internal energy	2.	Enthalpy
3.	Activation energy	4.	Entropy

Subtopic: Definition, Rate Constant, Rate Law |

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NEET - 2016

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Q8:

In a reaction, A + B → Product, the rate is doubled when the concentration of B is doubled, and the rate increases by a factor of 8, when the concentrations of both the reactants (A and B) are doubled. The rate law for the reaction can be written as:

1. Rate = k[A][B]²

2. Rate = k[A]²[B]²

3. Rate = k[A][B]

4. Rate = k[A]²[B]

Subtopic: Definition, Rate Constant, Rate Law |

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AIPMT - 2012

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Q9:

Which of the following statements about the order of reaction is incorrect?

1.	Order is not influenced by the stoichiometric coefficient of the reactants.
2.	Order of reaction is the sum of power to the concentration terms of reactants to express the rate of reaction.
3.	The order of reaction is always a whole number.
4.	Order can be determined by experiments only.

Subtopic: Definition, Rate Constant, Rate Law |

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AIPMT - 2011

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Q10:

The unit of rate constant for a zero-order reaction is:

1. $s^{- 1}$

2. $mol$ $L^{- 1} s^{- 1}$

3. $L$ ${mol}^{- 1} s^{- 1}$

4. $L^{2} {mol}^{- 2} s^{- 1}$

Subtopic: Definition, Rate Constant, Rate Law |

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AIPMT - 2011

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1.	\(\dfrac{-\Delta[\mathrm{H}I]}{\Delta t}=\dfrac{2 \Delta\left[\mathrm{H}_2\right]}{\Delta t}\)	2.	\(\dfrac{-\Delta[\mathrm{HI}]}{\Delta t}=\dfrac{4\Delta\left[\mathrm{I}_2\right]}{\Delta t}\)
3.	\(\dfrac{-\Delta[\mathrm{HI}]}{\Delta t}=\dfrac{4 \Delta\left[\mathrm{H}_2\right]}{\Delta t}\)	4.	\( \dfrac{-\Delta[\mathrm{HI}]}{\Delta t}=\dfrac{\Delta\left[\mathrm{H}_2\right]}{\Delta t}\)

1.	\(-\Delta [A] \over \Delta t\)	2.	\(-3\Delta [A] \over 2\Delta t\)
3.	\(-2\Delta [A] \over 3\Delta t\)	4.	\(\Delta [A] \over \Delta t\)

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