Amount of NaOH present in 200 ml of 0.5 N solution is 

(1) 40 g

(2) 4 g

(3) 0.4 g

(4) 4.4 g

50 ml of $10N{H}_{2}S{O}_4,25ml$ of 12 N HCl and 40 ml of $5NHN{O}_3$ were mixed together and the volume of the mixture was made 1000 ml by adding water. The normality of the resulting solution will be 

(1) 1 N

(2) 2 N

(3) 3 N

(4) 4 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

Amount of oxalic acid ${\left(\mathrm{COOH}\right)}_2.2{\mathrm{H}}_2\mathrm{O}$ in grams that is required to obtain 250 ml of a semi-molar solution is 

(1) 17.25 g

(2) 17.00 g

(3) 15.75 g

(4) 15.00 g

Volume of 10 M HCl should be diluted with water to prepare 2.00 L of 5 M HCl is 

(1) 2 L

(2) 1.5 L

(3) 1.00 L

(4) 0.5 L

The vapour pressure of a solvent A is 0.80 atm. When a non-volatile substance B is added to this solvent its vapour pressure drops to 0.6 atm. The mole fraction of B in the solution is [MP PMT 2000]

(1) 0.25

(2) 0.50

(3) 0.75

(4) 0.90

Osmotic pressure is 0.0821 atm at a temperature of 300 K. Find concentration in mole/litre [Roorkee 1990]

(1) 0.033

(2) 0.066

(3) 0.33 × 10^–2

(4) 3

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

A solution containing 3.3 g of a substance in 125 g of benzene (b.p. 80°C) boils at 80.66°C. If K_b for one litre of benzene is 3.28°C, the molecular weight of the substance shall be 

1. 127.20

2. 131.20

3. 137.12

4. 142.72

The molal b.p. constant for water is $0{.513}^{o}Ckgmo{l}^{-1}$. When 0.1 mole of sugar is dissolved in 200 g of water, the solution boils under a pressure of 1 atm at

(1) 100.513°C

(2) 100.0513°C

(3) 100.256°C

(4) 101.025°C