Question

Write one reaction for each of the following
Evolution of gas
Formation of precipitate
Change in colour
Evolution of heat

Answer 1

Answer:

The reactions for each of the following are----

Explanation:

1. Evolution of gas---

=Zn (s)+H2SO4 (aq) ------- ZnSO4(aq)+H2 (g)

2. Formation of precipitate---

=BaCl2 (aq)+Na2So4 (aq) ------- BaSO4 (s)+2NaCl (aq)

3. Change in colour---

=Pb(No3)2 (aq)+2kl ------- PBI2 (s)+2KNO3 (aq)

4. Evolution of heat---

=Zn (s)+H2So4 (aq) ------- ZnSo4(aq)+H2 (g)

HOPE IT HELPS U.

Answer 2

Explanation:

1.Zn+H2SO4---ZnSo4+H2

2.BaCl2+Na2So4---BaSo4+2NaCl

3.Pb(No3)2+2KI---PbI2+2KNo3

4.Zn+H2So4---ZnSo4+H2

hope its help u