Question

Evaluate the following statements for their correctness.
A. The elevation in boiling point temperature of water will be same for $0.1MNaCl$ and $0.1M$ urea.
B. Azeotropic mixtures boil without change in their composition.
C. Osmosis always takes place from hypertonic to hypotonic solution.
D. The density of $32\%H_{2}S{O}_4$ solution having molarity $4.09M$ is approximately $1.26gm{L}^{-1}$.
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 :

• A. B and D only
• B. B, D and E only
• C. A and C only
• D. A, B and D only

Answer 1

Answer: (A)

(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) $M=\frac{30\times 10\times 1.26}{98}\approx 4.09M$
(E) When $KI$ solutions is added to $AgN{O}_3$ solution, positively charged solution results due to adsorption of $A{g}^{\circ }$ ions from dispersion medium
$AgI/A{g}^{+}$
Positively charged