Write chemical equations for the reactions taking place when:

CBSE Class 10 CBSE Class 10 Science
1

Write chemical equations for the reactions taking place when:

1.a piece of calcium metal is placed in water.
2.ammonia gas comes in contact with hydrogen chloride gas.
3.sulphur is heated with concentrated H2SO4.

2

(a) Chemical reaction: Ca + 2H20 → Ca(OH)2 + 2H2

(b) NH3 + HCl → NH4Cl (ammonium chloride).

© S + 2H2SO4 → 3SO2 + 2H2 (Redox reaction).