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Solution


Q.

Evaluate the following statements for their correctness.

(A) The elevation in boiling point temperature of water will be same for 0.1 M NaCl and 0.1 M urea.

(B) Azeotropic mixtures boil without change in their composition.

(C) Osmosis always takes place from hypertonic to hypotonic solution.

(D) The density of 32% H2SO4 solution having molarity 4.09 M is approximately 1.26 g mL-1.

(E) A negatively charged sol is obtained when KI solution is added to silver nitrate solution.

Choose the correct answer from the options given below:                            [2023]
1 B and D only  
2 B, D and E only  
3 A and C only  
4 A, B and D only  

Ans.

(1)

(A) ΔTb is not same, as 'i' value is different for two solutions.

(B) Azeotropic mixture: Liquid mixtures which distill over without changes in composition are called constant boiling mixtures or azeotropes or azeotropic mixtures.

(C) Osmosis takes place from hypotonic to hypertonic.

(D) M=32×10×1.2698≈4.09 M  

(E) When KI is added to AgNO3 solution then positively charged sol is formed.