HSC Science (General) इयत्ता १२ वी - Maharashtra State Board Question Bank Solutions

Identify 'A' in the following reaction -

(a) 2- Bromo-2 methylbutane

(b) 1 -Bromo-2,2-dimethylpropane

(c) 1 - Bromo - 3 -methylbutane

(d) 1 - Bromo- 2 -methylpropane

Complete and rewrite the balanced chemical equations

Butanone + 2, 4-dinitro-phenylhydrazine 

What is the action of the following reagents on ethanoic acid?

1) `LiAlH_4"/"H_3O^+`

2) `PCl_3 , "heat"`

3) `P_2O_5, "heat"`

Write a short note on Hofmann elimination

What is the action of the following on ethyl bromide
alcoholic solution of potassium hydroxide.

Write the structure of Phenylmethanamine.

What are amines?

How will you convert sodium acetate to methane?

What is the action of the following on ethyl bromide:
moist silver oxide

What is the action of the following on ethyl bromide?

moist silver oxide

What is the action of the following on ethyl bromide?

silver acetate

How will you convert benzoic acid to m-bromobenzoic acid?

Write balanced equation for the following conversion: 
a. Cyclopropane carboxylic acid to cyclopropylmethanol.
b. Acetyl chloride to benzyl methyl ketone using dialkyl cadmium. 

Identify A and B from the following reaction and rewrite complete reaction: 

Choose the most correct answer.

In crystal lattice formed by bcc unit cell, the void volume is _______.

Choose the most correct answer.

The coordination number of atoms in bcc crystal lattice is _______.

Choose the most correct answer.

A compound forms hcp structure. Number of octahedral and tetrahedral voids in 0.5 mole of substance is respectively _______. 

Answer the following in one or two sentences.

Sketch a tetrahedral void.

Answer the following in brief.

How are the spheres arranged in first layer of simple cubic close-packed structures? How are the successive layers of spheres placed above this layer?

How are tetrahedral and octahedral voids formed?