Normal solution is :

• inert solution

• acidic solution

• one litre containing one equivalent

• basic solution

The vapour pressure will be lowest for :

• 0.1 M sugar solution

• 0.1 M KCl solution

• 0.1 M Cu(NO₃)₂ solution

• 0.1 M AgNO₃ solution

Blood cells will remain as such in :

• hypertonic solution

• hypotonic solution

• isotonic solution

• none of the above

A 5% solution (by mass) of cane sugar in water has freezing point of 271 K and freezing point of, pure water is 273.15 K. The freezing point of a 5% solution (by mass) of glucose in water is

• 271 K

• 273.15 K

• 269.07 K

• 277.23 K.

Assertion : If red blood cells were removed from the body and placed in pure water, pressure inside the cells increases.

Reason : The concentration of salt content in the cells increases.

• If both assertion and reason are true and reason is the correct explanation of the assertion.

• If both assertion and reason are true but reason is not the correct explanation of the assertion

• If assertion is true, but reason is false.

• Both assertion and reason are false statements.

Assertion : The water pouch of instant cold pack for treating athletic injuries breaks when squeezed and NH₄NO₃ dissolves lowering the temperature.

Reason : Addition of non-volatile solute into solvent results into depression of freezing point of solvent.

• If both assertion and reason are true and reason is the correct explanation of the assertion.

• If both assertion and reason are true but reason is not the correct explanation of the assertion.

• If assertion is true, but reason is false.

• Both assertion and reason are false statements.

Assertion : Addition of NH₄OH to an aqueous solution of BaCl₂ in the presence of NH₄Cl (excess) precipitates Ba(OH)₂.

Reason : Ba(OH)₂ is insoluble in water.

• 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.

Assertion : The molecular weight of acetic acid determined by depression in freezing point method in benzene and water was found to be different.

Reason : Water is polar and benzene is non-polar.

• 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.

589.

Which one of these, is not a colligative property ?

• vapour pressure

• osmotic pressure

• lowering in freezing point

• Elevation in boiling point

The osmotic pressure of which solution is maximum? (consider that decimormal solution of each is 90% dissociated) :

• Aluminium sulphate

• Barium chloride

• Sodium sulphate

• A mixture of equal volumes of (b) and (c)