Q. Zinc sulphate contains 22.65% of zinc and 43.9% of water of crystallization. If the law of constant proportions is true then the weight of zinc required to produce 20 g of the crystals will be
A) 45.3 g
B) 4.53 g
C) 0.453 g
D) 453 g
Explanation
(b)
To prepare 20 g zinc sulphate crystals, zinc required
$= \frac{22.65}{100} \times 20$
$= 4.53g$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.