SATHEE: Solutions Question 359

Solutions Question 359

Question: Which of the following has been arranged in the increasing order of freezing poin'

Options:

A) $0.025 M K N O_{3} < 0.1 M N H_{2} C S N H_{2}$ $< 0.05 M, B a C l_{2} < 0.1 M N a C l$

B) $0.1 M, N a C l < 0.05 M, B a C l_{2}$ $< 0.1 M, N H_{2} C S N H_{2} < 0.025 M, K N O_{3}$

C) $0.1 M, N H_{2} C S N H_{2} < 0.1 M, N a C l$ $< 0.05 M, B a C l_{2} < 0.025 M, K N O_{3}$

D) $0.025 M, K N O_{3} < 0.05 M, B a C l_{2}$ $< 0.1 M, N a C l < 0.1 M, N H_{2} C S N H_{2}$

Show Answer

Answer:

Correct Answer: B

Solution:

Greater is the effective molarity $(i \times C),$ higher the $Δ T_{f}$ value and lower the freezing point.

(i) $0.1 M, N a C l = i \times C = 2 \times 0.1 = 0.2$

(ii) $0.05 M, B a C l_{2} = i \times C = 3 \times 0.05 = 0.15$

(iii) $0.1 M, N H_{2} C S N H_{2} = i \times C = 1 \times 0.1 = 0.1$

(iv) $0.025 M, K N O_{3} = i \times C = 2 \times 0.025 = 0.50$

Thus, order is (i) < (ii) < (iii) < (iv)

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Solutions Question 359

Question: Which of the following has been arranged in the increasing order of freezing poin'

Options:

Answer:

Solution:

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