Mock Test 1 — Solutions

Solubility of gases at constant T:

$0.1$ M NaCl solution has $\pi$ relative to $0.1$ M sucrose ($i \approx 2$ for NaCl):

Acetone + ethanol shows:

Lowering of VP of solvent of dilute solution of non-volatile solute is:

$K_b$ for water:

Adding $1$ mol NaCl to $1$ kg water lowers freezing point by approximately:

Antifreeze used in radiators:

Reverse osmosis is applied for:

Two isotonic solutions have same:

The colligative property used to determine molar mass of polymers:

Mole fraction sum: $x_A + x_B$ (for two-component solution) =

Number of ions from one molecule of $Al_2(SO_4)_3$:

Van't Hoff factor for $K_2SO_4$ in water (complete dissociation):

Assertion (A): The osmotic pressure of $0.1$ M NaCl is about twice that of $0.1$ M sucrose. Reason (R): NaCl dissociates into Na⁺ and Cl⁻ in water, doubling the number of particles; sucrose does not dissociate.

Assertion (A): Acetic acid in benzene shows $i < 1$. Reason (R): Acetic acid dimerizes in benzene through hydrogen bonding, reducing the effective number of particles.