CBSE
Multiple Choice QuestionsAzeotropic mixture of HCl and water has :
48% HCl
22.2% HCl
36% HCl
20.2% HCI
A gaseous mixture contains 56 g N2 , 44 g CO2 and 16 g CH4 .The total pressure of the mixture is 720 mm Hg .What is the partial pressure of CH4 ?
142 mm
156 mm
182 mm
180 mm
Assertion: An ideal solution obeys Raoult's law.
Reason: In an ideal solution, solute-solute as well as solvent-solvent interactions are similar to solute-solvent interactions.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
For a dilute solution , Raoult's law states that :
the lowering of vapour pressure is equal to mole fraction of solute
the relative lowering of vapour pressure is equal to mole fraction of solute
the relative lowering of vapour pressure is proportional to the amount of solute in solution
the vapour pressure of the solution is equal to the mole fraction of solvent
Which of the following solutions will have the highest boiling point ?
0.1 M FeCl3
0.1 M BaCl2
0.1 M NaCl
0.1 M urea
Assertion : The solubility of a gas in a liquid increases with increase of pressure.
Reason : The solubility of a gas in a liquid is directly proportional to the pressure of the gas.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
At same temperature which pair of the following solutions are isotonic ?
0.2 M BaCl2 and 0.2 M urea
0.1 M urea and 0.1 M NaCl
0.1 M NaCl and 0.1 M K2SO4
0.1 M Ba(NO3)2 and 0.1 M Na2SO4
The relationship between osmotic pressure at 273 K when 10 g glucose (P1), 10 g urea (P2) and 10 g sucrose (P3) are dissolved in 250 mL of water is
P1 > P2 > P3
P3 > P1 > P2
P2 > P1 > P3
P2 > P3 > P1
0.5 molal solution of ethylene glycol in water is used as coolant in car .If the freezing point depression constant ofwater is l.86°C per mol , the mixture will freeze at :
0.93 °C
- 0.93 °C
1.86 °C
- 1.86 °C
The value of Henry's constant KH is
greater for gases with higher solubility
greater for gases with lower solubility
constant for all gases
not related to the solubility of gases.
