Class 12th Chemistry Chapter Chemical Kinetics free mcq test quiz

Are you ready to put your knowledge of Chemical Kinetics to the test? Get ready to dive into the exciting world of reaction rates, rate laws, and reaction mechanisms with our free test quiz for Chapter Chemical Kinetics!

Check Class 12th Chemistry Chemical Kinetics Chapter Knowledge

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12th Chemistry: Chemical Kinetics

1 / 10

1. In a slow reaction, rate of reaction generally .......... with time:

decreases

increases

sometimes increases and sometimes decreases.

remains constant

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2 / 10

2. In the reaction 2A + B→ A2B, if the concentration of A is doubled and that of B is halved, then the rate of the reaction will:

increase 2 times

increase 4 times

decrease 2 times

remain the same

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3 / 10

3. Which one of the following reactions is a true first order reaction?

Alkaline hydrolysis of ethyl acetate

Acid catalyst hydrolysis of ethyl acetate

Decomposition of N₂O

Decomposition of gaseous ammonia on a hot platinum surface

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4 / 10

4. The unit of rate of reaction is

mole/dm³

mole/pound

mole/dm³ sec

mole/cm³

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5 / 10

5. Half life of a first order reaction is 4s and the initial concentration of the reactant is 0.12 M. The concentration of the reactant left after 16 s is

0.0075 M

0.06 M

0.03 M

0.015 M

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6 / 10

6. In the presence of a catalyst, the heat evolved or absorbed during the reaction___________.

increases.

decreases.

remains unchanged.

may increase or decrease.

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7 / 10

7. The rate constant of a first order reaction is 6.9 x 10 ^{- 3} s ^{- 1} . How much time will it take to reduce the initial concentration to its 1/8 th value?

100 s

200 s

300 s

400 s

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8 / 10

8. The unit of rate constant for a zero order reaction is

mol L^–1 s^–1

L mol^–1 s^–1

L² mol^–2 s^–1

s^–1

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9 / 10

9. Which of the following statements is correct?

The rate of a reaction decreases with passage of time as the concentrationof reactants dereases.

The rate of a reaction is same at any time during the reaction.

The rate of a reaction is independent of temperature change.

The rate of a reaction decreases with increase in concentration ofreactant(s).

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10 / 10

10. The decomposition of N₂O₅ occurs as 2N₂O_{5 →} 4NO₂ + O₂ and follows Ist order kinetics, hence:

the reaction is unimolecular

the reaction is bimolecular

t_{1/2 ∞} a₀

None of these

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Quiz Score Card of Chemical Kinetics

? Note: This quiz is entirely free, and all students of Class 12th Chemistry are invited to participate. Make the most of this opportunity to strengthen your understanding of Chemical Kinetics and excel in your exams!

Chapter wise quiz of XII class chemistry

In this quiz, you will have the opportunity to showcase your understanding of the following key concepts:

1️⃣ Reaction Rates: Understanding how fast or slow a chemical reaction takes place and factors affecting it.

2️⃣ Rate Laws: Determining the mathematical relationship between the concentration of reactants and the rate of a reaction.

3️⃣ Integrated Rate Laws: Exploring the concentration changes of reactants over time.

4️⃣ Activation Energy: Unraveling the energy barrier that reactants must overcome to initiate a chemical reaction.

5️⃣ Arrhenius Equation: Understanding the relationship between temperature, rate constant, and activation energy.

6️⃣ Catalysis: Examining the impact of catalysts on reaction rates and mechanisms.

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