An aqueous solution containing 1 g urea boils at 100.25° C. The aqueous solution containing 3 g of glucose in the same volume will boil at:

Question

An aqueous solution containing 1 g urea boils at 100.25° C. The aqueous solution containing 3 g of glucose in the same volume will boil at: (A) 100° C (B) 100.5° C (C) 100.25° C (D) 100.75° C

Tardigrade Admin · Accepted Answer

Solution of non-electrolyte having same concentration will boil at same same temperature.

10 g

of urea;

m = \frac{\frac{1}{60}}{v} = \frac{1}{60 v}

3 g

of glucose

; m = \frac{\frac{3}{180}}{v} = \frac{1}{60 v}

We know

Δ T_{b} = k_{b} \times m

\Rightarrow Δ T_{b} \propto m

Here, molarity remains unchanged
Hence, they have the same boiling point.

Q. An aqueous solution containing $1 g$ urea boils at $100.2 5^{\circ} C$ . The aqueous solution containing $3 g$ of glucose in the same volume will boil at:

$10 0^{\circ} C$

$100. 5^{\circ} C$

$100.2 5^{\circ} C$

$100.7 5^{\circ} C$

Q. An aqueous solution containing 1g urea boils at 100.25∘C. The aqueous solution containing 3g of glucose in the same volume will boil at:

100∘C

100.5∘C

100.25∘C

100.75∘C

Solution of non-electrolyte having same concentration will boil at same same temperature. 10g of urea; m=v601​​=60v1​ 3g of glucose ;m=v1803​​=60v1​ We know ΔTb​=kb​×m ⇒ΔTb​∝m Here, molarity remains unchanged Hence, they have the same boiling point.

Q. An aqueous solution containing $1 g$ urea boils at $100.2 5^{\circ} C$ . The aqueous solution containing $3 g$ of glucose in the same volume will boil at:

$10 0^{\circ} C$

$100. 5^{\circ} C$

$100.2 5^{\circ} C$

$100.7 5^{\circ} C$