Question

A 5% solution of glucose (MW = 180) is isotonic with 3% of X. The molecular weight of substance X is

(a)  Half of mol. wt. of glucose

(b)  3/5 of mol. wt. of glucose.

(c)  1.66 times of mol. wt. of glucose.

(d)  3/8 times of mol. wt. of glucose.

Answer 1

Correct option (b) 3/5 of mol. wt. of glucose.

Explanation:

W₁ /M₁ = W₂ /M₂ or M₂ = (W₂M₁ )/ W1 = 3 x 180/ 5