10.6 g of Na₂CO₃ was exactly neutralised by 100 ml of H₂SO₄ solution. Its normality is

(1) 1 N

(2) 2 N

(3) 1.5 N

(4) 0.5 N

Equal volumes of $0.1\mathrm{M}{\mathrm{AgNO}}_3$ and 0.2 M NaCl are mixed. The concentration of ${\mathrm{NO}}_3^{-}$ ions in the mixture will be 

(1) 0.1 M

(2) 0.05 M

(3) 0.2 M

(4) 0.15 M

If 20 ml of 0.4 N NaOH solution completely neutralises 40 ml of dibasic acid. The molarity of acid solution is

(1) 0.1 M

(2) 0.2 M

(2) 0.3 M

(4) 0.4 M

Calculate the molality of a solution of H₂SO₄ having specific gravity 1.98 g mL⁻¹ and composition 95% (w/v)

(1) 7.412

(2) 8.412

(3) 9.412

(4) 10.412

A solution contains 16 gm of methanol and 90 gm of water, mole fraction of methanol is

(1) 0.90

(2) 0.090

(3) 0.1

(4) 1.9

Lowering in vapour pressure is the highest for:

1. 0.2 m urea

2. 0.1 m glucose

3. 0.1 m MgSO₄

4. 0.1 m BaCl₂

The Vapour pressure of CCl₄ at 25°C is 143 mm Hg. 0.5 g of a non-volatile solute (mol. wt. 65) is dissolved in 100 ml of CCl₄. The vapor pressure of the solution is:

(Density of CCl₄ = 1 .58 g/cm³$)$

1. 141.93 mm Hg

2. 94.39 mm Hg

3. 199.34 mm Hg

4. 143.99 mm Hg

The vapour pressure of pure benzene and toluene are 160 and 60 torr respectively. The mole fraction of toluene in vapour phase in contact with an equimolar solution of benzene and toluene is -

Find the molar concentration (in mol L⁻¹) of a solution whose osmotic pressure is 0.0821 atm at 300 K.

(1) 0.033

(2) 0.066

(3) 0.33 × 10^–2

(4) 3.0

The osmotic pressure of 5 % (mass-volume) solution of cane sugar at 150 °C (mol. mass of sugar = 342 g/mole) is: