1. Write one of the reaction for each of the following
characteristics :
(a) Change of colour
(b) Change of state
(c) Evolution of gas
(d) Formation of precipitate
(e) Evolution of heat
(f) Change of smell
Answers
Answer:
(a) Zn + H2SO4 → ZnSO4 + H2↑
Zinc Sulphuric Zinc Hydrogen
acid sulphate
(b) CuCO3 → CuO + CO2↑
Copper Copper Carbon
carbonate oxide dioxide
(green) (black)
(c) CuSO4 + H2S → CuS↓ + H2SO4
Copper Hydrogen Copper Sulphuric
sulphate sulphide sulphide acid
(d) 2H2O (l) → 2H2 (g) + O2 (g)
Water Hydrogen Oxygen
(e) 2H2 (g) + O2 (g) → 2H2O (l)
Hydrogen Oxygen Water
Hope it helps...
Explanation: