41) ………….. aqueous molal solution have highest freezing point.

a) Urea
b) Barium chloride.
c) Potassium bromide.
d) Aluminium sulphate.

ANSWER : Urea

42) When a thin slice of sugar beet is placed in a concentrated solution of NaCl then sugar beet will………….

a) dissolve in solution.
b) neither absorb nor lose water.
c) absorb water from solution.
d) lose water from its cell.

ANSWER : lose water from its cell.

43) The wrong relation between osmotic pressure (P), volume (V) and temperature (T) is:

a) P a n if T and V are constant.
b) Pv is constant if T is constant.
c) P a V if T is constant.
d) P a T if V is constant.

ANSWER : P a V if T is constant.

44) Two solutions C and D are separated by a semi-permeable membrane. If liquid flows from D to C then.

a) Both have same concentration.
b) D is less concentrated than C.
c) D is more concentrated than C.
d) None of these.

ANSWER : D is less concentrated than C.

45) Haemolysis is the phenomenon on which cells are swelled up and then burst if placed in a:

a) isotonic solution.
b) none of these.
c) hypertonic solutions.
d) hypotonic solution.

ANSWER : hypotonic solution.

46) Find the molarity of 0.585g NaCl present in 500 ml of solution.

a) 0.2 M.
b) 0.01 M.
c) 0.1 M.
d) 0.02 M.

ANSWER : 0.02 M.

47) If ethylene glycol is added to water in radrator cars during winter then it would lead to:

a) reducing specific heat.
b) reducing viscosity.
c) lowering in freezing point.
d) lowering in boiling point.

ANSWER : lowering in freezing point.

48) What is the freezing point of 0.05 molal solution of a non-electrolyte in water?

a) + 3.72°C.
b) – 0.093°C.
c) - 186°C.
d) -93°C.

ANSWER : – 0.093°C.

49) Unit of molarity is:

a) Kg / litre.
b) mol / litre.
c) gm / litre.
d) none of these.

ANSWER : mol / litre.

50) Which one of the following will exhibit highest osmotic pressure at 25°C?

a) KCl
b) Glucose.
c) Urea.
d) Calcium chloride.

ANSWER : Calcium chloride. 

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