Give
one
example
of
a
chemical
reaction
characteristic
in
the
diagram
Answers
Answer:
1.Evolution of gas:
The chemical reaction between zinc and dilute sulphuric acid is characterized by the evolution of hydrogen gas.
Zn(s) + H² SO4(aq) → ZnSO⁴ (aq) + H² (g)
2.Change in colour:
The reaction between the lead nitrate solution and potassium iodide solution.
Pb(NO³)² (aq) + 2KI → PbI² (s) + 2KNO³ (aq)
In this reaction colour changes from colourless to yellow.
3.Formation of precipitate:
The action of Barium Chloride on sodium sulphate.
BaCl² (aq) + Na² SO⁴ (aq) → BaSO⁴ (s) + 2KNaCl(aq)
4.Change in temperature:
The action of dilute sulphuric acid on zinc:
Zn(s) + H²SO⁴ (aq)→ZnSO⁴ (s) + H² (g)
In this reaction, heat is evolved.
5.Change in the state:
When the wax is burnt in the form of the wax candle then water and carbon dioxide are formed. Wax is solid, water is a liquid whereas carbon dioxide is a gas.
Hope it helps you army..
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Answer:
1.Evolution of a gas.
2.Change in colour.
3.Formation of a precipitate.
4.Change in temperature.
5.Change in state.
