ICSE Class 10 Chemistry Question 11 of 23

Solved Sample Paper 4 — Question 8

Back to all questions
8
Question

Question 4(iv)

The following is a list of methods for the preparation of salts:

A — direct combination of two elements

B — reaction of a dilute acid with a metal

C — reaction of a dilute acid with an insoluble base

D — titration of a dilute acid with a solution of soluble base.

E — reaction of two solutions of salts to form a precipitate.

Choose from the list A to E, the best method of preparing the following salts by giving a suitable equation in each case:

  1. Copper (II) Sulphate
  2. Calcium Carbonate
  3. Zinc sulphate
Answer

(a) C — reaction of a dilute acid with an insoluble base
Cu(OH)2 + H2SO4 (dil.) ⟶ CuSO4 + 2H2O

(b) E — reaction of two solutions of salts to form a precipitate
CaCl2 + Na2CO3 ⟶ CaCO3 ↓ + 2NaCl

(c) B — reaction of a dilute acid with a metal
Zn + H2SO4 (dil.) ⟶ ZnSO4 + H2