A $10 %$ aqueous solution of cane sugar (mol. wt. 342) is isotonic with 1.754% aqueous solution of urea. Find the molecular mass of urea.

Important Questions on Solutions

HARD

12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>QUESTIONS FROM ISC EXAMINATION PAPERS>Q 23

The molecular weight of an organic compound is

58 g \cdot {mol}^{- 1}

. What will be the boiling point of a solution containing

48 g

of the solute in

1200 g

of water? [K_b for water

= 0.513 ° C \cdot Kg \cdot {mol}^{- 1}

, Boiling point of water

= 100 ° C

)

HARD

12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>QUESTIONS FROM ISC EXAMINATION PAPERS>Q 23

What will be the value of van't Hoff factor(i) of benzoic acid if it dimerises in aqueous solution. How will the experimental molecular weight vary as compared to normal molecular weight?

HARD

12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>QUESTIONS FROM ISC EXAMINATION PAPERS>Q 24

Why the freezing point depression (

∆ T_{f}

) of 0.4 M NaCl solution is nearly twice than that of 0.4 M glucose solution?

HARD

12th ICSE

IMPORTANT

ICSE Chemistry>Chapter 2 - Solutions>QUESTIONS FROM ISC EXAMINATION PAPERS>Q 25

Determine the freezing point of a solution containing $0.625 g$ of glucose ( $C_{6} H_{12} O_{6}$ ) dissolved in $102.8 g$ of water. (Freezing point of water = $273 K$ , K_f for water $= 1.87 K \cdot kg \cdot {mol}^{- 1}$ , at. wt. $C = 12, H = 1, O = 16$ )