Solutions Question 14
Question 14 - 31 January - Shift 2
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 $32 % \quad H_2 SO_4$ 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 :
(1) B, D, and E only
(3) A and C only
(2) A, B, and D only
(4) B and D only
Show Answer
Answer: (4)
Solution:
(A) $\Delta T_b \propto i \times c$
(B) Azeotropic mixtures have same composition in both liquid and vapour phase.
(C) Osmosis always takes place from hypotonic to hypertonic solution.
(D) $M=\frac{30 \times 10 \times 1.26}{98} \approx 4.09 M$
(E) When KI solutions is added to $AgNO_3$ solution, positively charged solution results due to adsorption of $Ag^{\text{}}$ ions from dispersion medium
$AgI / Ag^{+}$
Positively charged
