NCERT Intext Based MCQs 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

For the reaction R → P, the concentration of a reactant changes from 0.03 M to 0.02 M in 25 minutes.
The average rate of reaction in M sec^–1 is-

1. 6.67×10^–5 M s^–1
2. 5.67×10^–5 M s^–1
3. 6.67×10^–6 M s^–1
4. 5.67×10^–6 M s^–1

Subtopic: Definition, Rate Constant, Rate Law |

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In a reaction, 2A → Products, the concentration of A decreases from 0.5 mol L⁻¹ to 0.4 mol L⁻¹ in 10 minutes.
The rate during this interval is-

1. 5×10^–3M min^–1
2. 8×10^–3M min^–1
3. 9×10^–3M min^–1
4. 3×10^–3M min^–1

Subtopic: Definition, Rate Constant, Rate Law |

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For a reaction, A + B → Product; the rate law is given by, r=k[A]^1/2[B]². The order of the reaction is:

1.	–1.5	2.	1.5
3.	0.5	4.	2.5

Subtopic: Order, Molecularity and Mechanism |

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The conversion of molecules X to Y follows second order kinetics. If concentration of X is increased to three times, then the rate of formation of Y will -

1.	Decreases by 3 times	2.	Increase by 3 times
3.	Decreases by 9 times	4.	Increase by 9 times

Subtopic: Order, Molecularity and Mechanism |

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A first order reaction has a rate constant 1.15 × 10⁻³ s⁻¹. The time required to convert 5g of this reactant into 3g is-

1. 424 s
2. 444 s
3. 464 s
4. 484 s

Subtopic: First Order Reaction Kinetics |

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Time required to decompose SO₂Cl₂ to half of its initial amount is 60 minutes. If the decomposition is a first order reaction, the rate constant of the reaction in sec^–1is-

1.	1.9 × 10^–4 s^–1	2.	1.7 × 10^–4 s^–1
3.	2.2 × 10^–4 s^–1	4.	1.6 × 10^–4 s^–1

Subtopic: First Order Reaction Kinetics |

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Rate constant (k) and temperature (T) are related as :

1. \(k \,\, = A\, \, e^{\frac{-E_{a}}{RT}}\)
2. \(k \,\, = A\, \, e^{\frac{RT}{-E_{a}}}\)
3. \(k \,\, = A\, \, e^{\frac{E_{a}}{RT}}\)
4. None of the above

Subtopic: Arrhenius Equation |

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The rate of the chemical reaction doubles for an increase of 10 K in absolute temperature from 298 K. The value of E_a is-
1. 49.5 kJ mol^–1
2. 52.9 kJ mol^–1
3. 55.5 kJ mol^–1
4. 57.9 kJ mol^–1

Subtopic: Arrhenius Equation |

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The activation energy for the reaction 2HI_(g) → H₂ + I_2(g) is 209.5 kJ mol⁻¹ at 581K. The fraction of molecules of reactants having energy equal to or greater than activation energy is-

1. 2.67 × 10⁻¹⁹
2. 3.57 × 10⁻¹⁸
3. 4.67 × 10⁻¹⁷
4. 1.47 × 10⁻¹⁹

Subtopic: Arrhenius Equation |

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Select Chapter Topics:

Definition, Rate Constant, Rate Law

Arrhenius Equation

First Order Reaction Kinetics

Order, Molecularity and Mechanism

Catalyst

Select Chapter Topics:

Definition, Rate Constant, Rate Law

Arrhenius Equation

First Order Reaction Kinetics

Order, Molecularity and Mechanism

Catalyst

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Order, Molecularity and Mechanism

Catalyst

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Select Chapter Topics:

Definition, Rate Constant, Rate Law

Arrhenius Equation

First Order Reaction Kinetics

Order, Molecularity and Mechanism

Catalyst

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