Question

When lead nitrate is heated it decomposes with a cracking sound, a reddish brown gas is liberated and a solid residue is left in the test tube. (i) Name the type of reaction. (ii) Write the name and formula of the gas. (iii) Write the name and colour of the residue left. (iv) Write the balanced chemical equation to describe the reaction

Answer 1

(i) Type of reaction is decomposition reaction.
(ii) Nitrogen Dioxide (NO₂) and Lead oxide (PbO)
(iii) Namw of residue is Lead salt and its Colour is yellow.
(iv) 2Pb(NO₃)₂(s) → 2PbO(s) + 4NO₂(g) + O₂(g)

Answer 2

When lead nitrate is heated it decomposes with a cracking sound, a reddish-brown gas is liberated and a solid residue is left in the test tube. (i) Name the type of reaction. (ii) Write the name and formula of the gas. (iii) Write the name and colour of the residue left. (iv) Write the balanced chemical equation to describe the reaction

Explanation:

 (i) Name the type of reaction.

    A decomposition reaction is the sort of reaction.

ii) Write the name and formula of the gas.

 Lead oxide with Nitrogen Dioxide (NO2) (PbO)

(iii) Write the name and colour of the residue left. (iv) Write the balanced

  Lead salt is the name of the residue, and it is yellow in colour.

(iv) Write the balanced chemical equation to describe the reaction

 2Pb(NO₃)₂(s) → 2PbO(s) + 4NO₂(g) + O₂(g)