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

Electrolytic method of preparation of dioxygen.

Industrial method of preparation of dioxygen.

Define enthalpy.

What is oxide?

Write names of two oxides.

Write equation to convert Methyl cyanide to ethanoic acid.

Write the structure of the major product of the aldol condensation of benzaldehyde with acetone.

Draw structure of SO₂.

What is the action of the following regent on propanal?

Sodium Bisulphite

How will you determine molar mass of solute from osmotic pressure?

Explain buffer action of sodium acetate-acetic acid buffer.

Write the condition of reverse osmosis.

Explain  Optical activity

Which of the following amines yields foul smelling product with holoform and alcoholic KOH?

(a)    Ethyl amine                   

(b)   Diethyl amine

(c)    Triethyi amine               

(d)  Ethyl methyl amine

Derive van’t Hoff general solution equation.

Explain the structure of sulphur dioxide.

The substance ‘X’, when dissolved in solvent water gave molar mass corresponding to the molecular formula ‘X3’. The van’t Hoff factor (i) is _______.

(A) 3

(B) 0.33

(C) 1.3

(D) 1

What is natural rubber?

(A) Cis-1,4-polyisoprene

(B) Neoprene

(C) Trans-1,4-polyisoprene

(D) Butyl rubber

What is the value of for the following reaction at 298 K -

6CO₂+ 6H₂0_(l) → C6H₁₂0_6(s) ⁺ 60_2(g),

Given that: ΔG° = 2879 kj mol^-1, AS = -210 JK^-1 mol^-1.

State and explain Hess’s law of constant heat summation.