Physical Chemistry MCQ with Answers

Physical Chemistry MCQ with Answers

156) A solution of sucrose has been prepared by dissolving 68.5 gm of sucrose in 1000 gm of water. The freezing point of the solution obtained will be:

Answer is:

−0.372^oC

Explanation:

ΔT_f = K_fm

157) What is the correct order of value of a, the Vender Waal′s constant?

Answer is:

H₂ < He < N₂ < Ar

158) 1 mol of Ne and 1 mol of N₂ are placed in a container. Indicate the incorrect statement about this system:

Answer is:

Molecules of the two gases strike the wall of the container with same frequency

Explanation:

The two gases have different velocities, therefore frequency of striking the wall will be different

159) Two containers of same volume containing 1 mol of O₂ and H₂, having V_rms of H₂ 2 times than that of O₂. If the two containers are connected, what will be the ratio of rate of diffusion of O₂ to H₂?

Answer is:

0.042361111

160) Which of the following value of R is incorrect?

Answer is:

7.189 x 10¹⁹ eV⁄K mol

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