Physical Chemistry MCQ with Answers

Physical Chemistry MCQ with Answers

136) 18 gm of glucose is added to 178.2 gm of water. The vapour pressure of water for this aqueous solution at 100^oC is:

Answer is:

752.4 torr

137) Which of the following liquid pairs shows a positive deviation from Raoult′s law?

Answer is:

Benzene − methanol

138) An aqueous solution of sucrose, containing 34.2 gm⁄L, has an osmotic pressure of 2.38 atm at 17^oC. For an aqueous solution of glucose to be isotonic with this solution, it would have:

Answer is:

18 gm⁄L

Explanation:

P (sucrose) = P (glucose)

139) pH of 0.1M monobasic acid solution is found to be 2. Its osmotic pressure at T K is:

Answer is:

0.11ST

140) 0.01M solution of KCl nad BaCl₂ are prepared in water. The freezing point of KCl is found to be −2^oC. What is the freezing point of BaCl₂ solution, assuming both to be completely ionized?

Answer is:

−3^oC

Explanation:

ΔT_f ∝ i

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