Physical Chemistry MCQ with Answers

146) Human blood has an osmotic pressure of 7.65 atm at body temperature. Hence, molarity of an intravenous glucose solution to have same osmotic pressure, will be:

Answer is:

0.3M

Explanation:

πV = nRT

147) A supersaturated solution is a metastable state of solution in which solute concentration:

Answer is:

Exceeds its solubility

148) If an aqueous solution of glucose is allowed to freeze, then crystals of which will separate out first?

Answer is:

Water

Explanation:

As the solute is solid, then solvent (water) will freeze out.

149) The freezing point 1m NaCl solution assuming NaCl to be 100% dissociated in water is:

Answer is:

−3.72^oC

Explanation:

ΔT_f = iK_fm

150) Which has the highest freezing point?

Answer is:

1m glucose solution

Explanation:

A substance which in the aqueous solution, furnishes the minimum number of particles will lower the freezing point to the minimum. Therefore, this solution will have the maximum freezing point.

146) Human blood has an osmotic pressure of 7.65 atm at body temperature. Hence, molarity of an intravenous glucose solution to have same osmotic pressure, will be:

0.3M

147) A supersaturated solution is a metastable state of solution in which solute concentration:

Exceeds its solubility

148) If an aqueous solution of glucose is allowed to freeze, then crystals of which will separate out first?

Water

149) The freezing point 1m NaCl solution assuming NaCl to be 100% dissociated in water is:

−3.72oC

150) Which has the highest freezing point?

1m glucose solution

−3.72^oC