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An aqueous solution containing one gram of urea boils at 100.25°C. The aqueous solution containing 3gm of glucose in the same volume will boil at

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100°C

100.25°C

100.5°C

100.75°C

answer is B.

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Detailed Solution

large begin{array}{l} Delta {T_b} = {K_b}m\\ frac{{Delta {T_1}}}{{Delta {T_2}}} = frac{{{m_1}}}{{{m_2}}},, to (1) end{array}

Given ,

BP of urea solution = 100.25^oc

W_urea = 1gm

GMW of urea = 60gm

large Delta T_{urea}=(100.25-100)=0.25^oc

W_glucose = 3g , GMW of glucose = 180g

By substituting the values in eq.(1)

large frac{0.25}{Delta T_{glucose}}=frac{(frac{1}{60})}{(frac{3}{180})}

BP of glucose sol. = (100+0.25) =100.25^oc

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