HSC Science (General) इयत्ता १२ वी - Maharashtra State Board Important Questions for Chemistry

An element with molar mass 27 g/mol forms a cubic unit cell with edge length of 405 p.m. If the density of the element is 2.7 g/cm³, what is the nature of the cubic unit cell?

Draw diagram of bcc unit cell.

Define unit cell.

Gold crystallises into face-centred cubic cells. The edge length of a unit cell is 4.08 × 10^–8 cm. Calculate the density of gold. [Molar mass of gold = 197 g mol^–1]

Define isomorphism.

Define boiling point

Define boiling point

Derive van’t Hoff general solution equation.

Define ebullioscopic constant.

What is the effect of temperature on solubility of a gas in a liquid?

Define van’t Hoff factor.

Write two differences between an ideal solution and a non-ideal solution.

Write two differences between an ideal solution and a non-ideal solution.

Calculate the freezing point of the solution when 31 g of ethylene glycol (C₂H₆O₂) is dissolved in 500 g of water.

(K_f for water = 1.86 K kg mol^–1)

Define osmotic pressure.

Define osmotic pressure.

Define the following term:
isotonic solution

Define the following term:
isotonic solution

The units of Henry’s law constant are ______.

The colligative properties of solutions _______.