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

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 _______.

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?

Third layer of spheres is added to second layer so as to form hcp or ccp structure. What is the difference between the addition of third layer to form these hexagonal close-packed structures?

The pH of 10⁻⁸ M of HCl is ______.

Which of the following solution will have a pH value equal to 1.0?

Choose the most correct answer :

Blood in the human body is highly buffered at a pH of ________.

Choose the most correct answer :

For pH > 7 the hydronium ion concentration would be _________.

Answer the following in one sentence:

The pH of a solution is 6.06. Calculate its H⁺ ion concentration.

Answer the following in one sentence :

Calculate the pH of 0.01 M sulphuric acid.

Derive the relation pH + pOH = 14.

Answer the following in brief :

The pH of a weak monobasic acid is 3.2 in its 0.02 M solution. Calculate its dissociation constant.