MCQ
Laws of Chemical Combination
By Sakshi Goel | 18 May'20 | 1 K Views
MCQ
Problem:
Solution:
Quick Link
Zinc sulphate contains 22.65% Zn and 43.9% H2O. If the law of constant proportions is true, then the mass of Zinc required to give 40 g crystal will be
(a) 90.6 g
(b) 9.06 g
(c) 0.906 g
(d) 906 g
Solution:
As each crystal of zinc sulphate will contains 22.65% Zn, so 40 g crystal will also contain 22.65% Zn.
Zn in the crystal = 22.65% of 40 g
=(22.65/100) x 40 = 9.06 g
Correct option is (b).
Quick Link
