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HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions

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Answer the following in one or two sentences.

What are the units for rate constants for zero-order and second-order reactions if time is expressed in seconds and concentration of reactants in mol/L?

[6] Chemical Kinetics
Chapter: [6] Chemical Kinetics
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Answer the following in one or two sentences.

Write the relationships between rate constant and half-life of the first order and zeroth-order reactions.

[6] Chemical Kinetics
Chapter: [6] Chemical Kinetics
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Answer the following in one or two sentences.

How do the half-lives of the first order and zero-order reactions change with the initial concentration of reactants?

[6] Chemical Kinetics
Chapter: [6] Chemical Kinetics
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Answer the following in brief.

Obtain the relationship between the rate constant and half-life of a first-order reaction.

[6] Chemical Kinetics
Chapter: [6] Chemical Kinetics
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Answer the following in brief.

How will you represent the zeroth-order reaction graphically?

[6] Chemical Kinetics
Chapter: [6] Chemical Kinetics
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What are pseudo-first-order reactions?

[6] Chemical Kinetics
Chapter: [6] Chemical Kinetics
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Answer the following in brief.

Derive the integrated rate law for the first-order reaction.

[6] Chemical Kinetics
Chapter: [6] Chemical Kinetics
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How will you represent first order reactions graphically.

[6] Chemical Kinetics
Chapter: [6] Chemical Kinetics
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Answer the following in brief.

Derive the integrated rate law for the first-order reaction,

\[\ce{A_{(g)} -> B_{(g)} + C_{(g)}}\] in terms of pressure.

[6] Chemical Kinetics
Chapter: [6] Chemical Kinetics
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Answer the following in brief.

What is a zeroth-order reaction?

[6] Chemical Kinetics
Chapter: [6] Chemical Kinetics
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In a first-order reaction, the concentration of the reactant decreases from 20 mmol dm3 to 8 mmol dm−3 in 38 minutes. What is the half-life of reaction? 

[6] Chemical Kinetics
Chapter: [6] Chemical Kinetics
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Solve

The half-life of a first-order reaction is 1.7 hours. How long will it take for 20% of the reactant to react?

[6] Chemical Kinetics
Chapter: [6] Chemical Kinetics
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Answer the following.

What is the action of chlorine on Fe?

[7.03] Group 17 Elements
Chapter: [7.03] Group 17 Elements
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Solve

A first-order reaction takes 40 minutes for 30% decomposition. Calculate its half-life.

[6] Chemical Kinetics
Chapter: [6] Chemical Kinetics
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Answer the following.

How is hydrogen chloride prepared from sodium chloride?

[7.03] Group 17 Elements
Chapter: [7.03] Group 17 Elements
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What is the action of hydrochloric acid on NH3?

[7.03] Group 17 Elements
Chapter: [7.03] Group 17 Elements
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What is the action of hydrochloric acid on Na2CO3?

[7.03] Group 17 Elements
Chapter: [7.03] Group 17 Elements
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Answer the following.

Give two uses of HCl.

[7.03] Group 17 Elements
Chapter: [7.03] Group 17 Elements
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Answer the following

What is the oxidation state of Manganese in `"MnO"_4^(2-)`

[8] Transition and Inner Transition Elements
Chapter: [8] Transition and Inner Transition Elements
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Answer the following

What is the oxidation state of manganese in: `"MnO"_4^-`?

[8] Transition and Inner Transition Elements
Chapter: [8] Transition and Inner Transition Elements
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