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

Define molecularity.

Name the process of breaking C-X bond by ammonia in preparation of amines.

Write the number of moles of ethanoyl chloride required for complete acylation of N, N-dimethylaniline.

Write an expression for instantaneous rate of reaction:

2N₂O_(g) → 4NO_2(g) + O_2(g).

What is the order of reaction?

Why is molecularity applicable for only elementary reactions whereas order of a reaction is applicable for elementary and complex reactions? Explain with suitable examples.

For a zero-order reaction, molecularity can never be equal to zero. Explain.

Write the order of reactivity of alkyl halides with ammonia.

Give one example of the reaction where order and molecularity are the same. 
Mention any two factors that influence the rate of chemical reaction.
If for the reaction A → products, a straight line graph passing through origin is obtained between the rate of reaction against concentration of A, what would be the order of reaction? Why?

In chlorous acid, oxidation state of chlorine is _______.

What is the action of nitrous acid on the following compounds?

Isopropyl amine

Write reactions to bring about the following conversions.

Acetamide to Ethylamine

Write reactions to bring about the following conversions.

Acetamide to methylamine

Elements of group 16 have lower ionization enthalpy values compared to those of group 15 elements. Explain why?

Explain Hoffmann’s exhaustive alkylation with suitable reactions.

How are amines classified depending on the functional group? Give one example of each class of amines.

Write reactions for the preparation of ethanamine using Gabriel phthalimide synthesis.

Why cannot aniline be prepared by Gabriel phthalimide synthesis?

Explain the following reaction with a suitable example.

Hofmann elimination reaction

The optically inactive α-amino acid among the following is _____________

The chemical nature of peptide bond in proteins is ____________