HSC Science (Electronics) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions for Chemistry

Give one example of a pseudo first-order reaction.

Write order of the following reaction:

\[\ce{2NH_{3(g)} -> N_{2(g)} + 3H_{2(g)}}\]

Write a mathematical expression for integrated rate law for zero-order reaction.

What is half life of first order reaction if time required to decrease concentration of reactants from 0.8 M to 0.2 M is 12 hours?

For the reaction 2NOBr → 2NO₂ + Br₂, the rate law is rate = k[NOBr]₂. If the rate of a reaction is 6.5 × 10^–6 mol L^–1 s^–1, when the concentration of NOBr is 2 × 10^–3 mol L^–1. What would be the rate constant of the reaction?

Explain pseudo first order reaction with a suitable example.

Explain with the help of a potential energy diagram that the catalyst increases the rate of the reaction.

Derive an integrated rate law expression for first order reaction: A → B + C

The rate constant of the first order reaction is 1.386 min^–1. Calculate the time required for 80% reactant to decompose?

Tertiary amines have lowest boiling points because ________________

Arrange the following compounds in increasing order of their boiling points.

Ethyl alcohol, Ethyl amine, Ethanoic acid, Ethane

Write units of rate constants for:

1. First-order reaction
2. Zero-order reaction

Derive an expression for the relation between half-life and rate constant for first-order reaction.

The gas evolved when sulfuric acid reacts with copper metal _______.

Hot and concentrated alkali NaOH reacts with chlorine to form _______.

When SO₂ is passed through an aqueous solution of I₂, the solution becomes _______.

Why oxygen cannot exhibit a higher oxidation state?

What is the action of chlorine on cold and dilute sodium hydroxide.

What is the action of chlorine on hot and concentrated sodium hydroxide?

Write the chemical reaction of action of Cl₂ on excess NH₃.