The molality of a solution containing 1.8g of glucose dissolved in 250 g of water is _____________

(a)

0.2 M

(b)

0.01 M

(c)

0.02 M

(d)

0.04 M

Which of the following concentration terms is/are independent of temperature _____________

(a)

molality

(b)

molarity

(c)

mole fraction

(d)

(a) and (c)

The Henry's law constant for the solubility of Nitrogen gas in water at 350 K is 8 x 10⁴ atm. The mole fraction of nitrogen in air is 0.5. The number of moles of Nitrogen from air dissolved in 10 moles of water at 350K and 4 atm pressure is ____________

(a)

4 x 10^-4

(b)

4 x 10⁴

(c)

2 x 10^-2

(d)

2.5 x 10^-4

Which one of the following is incorrect for ideal solution ?

(a)

\(\Delta H_{mix}=0\)

(b)

\(\Delta U_{mix}=0\)

(c)

\(\Delta P=P_{observed}-P_{calculated\ by\ raoults\ law}=0\)

(d)

\(\Delta G_{mix}=0\)

The blocking of capillaires due to sudden release of bubbles of N₂ gas in blood is known as ______

(a)

bends

(b)

blends

(c)

mends

(d)

all of these

Which of the following gas should have maximum value for k_H?

(a)

He

(b)

H₂

(c)

N₂

(d)

CO₂

The increase in the temperature of the aqueous solution placed in a closed vessel will result in its _________

(a)

molarity to increase

(b)

molarity to decrease

(c)

mole fraction to increase

(d)

mass % increase

In a binary solution __________

(a)

solvent may be liquid

(b)

solvent may be solid

(c)

solute may be gas

(d)

any of these

The temperature at which the vapour pressure of a liquid equals external pressure is called __________

(a)

freezing point

(b)

boiling point

(c)

melting point

(d)

critical temperature

Solubility of gas decreases in a liquid by ____________

(a)

increase of temperature

(b)

cooling

(c)

increasing pH

(d)

decreasing pH