Evaluate the following statements for their correctness. (A) The … - Vidyadip

MCQ

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 $32 \% H _2 SO _4$ 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 :

A
$B, D$ and $E$ only
B
$A, B$ and $D$ only
C
$A$ and $C$ only
✓
$B$ and $D$ only

✓

Answer

Correct option: D.

$B$ and $D$ only

d
$(A)$ $\Delta T _{ b } \propto i \times c$

$(B)$ 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 $Ag ^{ F }$ ions from dispersion medium

$AgI / Ag ^{+}$

Positively charged

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