HSC Science (Electronics) १२ वीं कक्षा - Maharashtra State Board Important Questions for Chemistry

Draw diagram of bcc 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 boiling point

Define boiling point

Derive van’t Hoff general solution equation 

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

Define van’t Hoff factor.

Derive the relationship between relative lowering of vapour pressure and molar mass of nonvolatile solute.

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 _______.

Distinguish between ideal and non-ideal solutions.

Explain the osmotic pressure of a solution with the help of a thistle tube.

Explain the osmotic pressure of a solution with the help of a thistle tube.