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

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.

What happens when chlorine reacts with?

Al

What happens when chlorine reacts with?

Na

What happens when chlorine reacts with?

S₈

What happens when chlorine reacts with?

P₄

The following ion has the maximum number of unpaired electrons.

Derive an expression for pressure-volume work.

Three moles of an ideal gas are expanded isothermally from 15 dm³ to 20 dm³ at a constant external pressure of 1.2 bar. Calculate the amount of work in Joules.

Dacron is a copolymer of ethylene glycol and _______________