Question

The total number of moles of the brown coloured gas formed during the thermal decomposition of 2 moles of lead nitrate is

• A.
  4
• B.
  3
• C.
  2
• D.
  1

Answer 1

The correct option is A

4
On heating, lead nitrate decomposes to produce lead oxide, brown coloured nitrogen dioxide gas, and oxygen gas. The chemical equation involved in the reaction is:



So, four moles of brown coloured nitrogen dioxide gas are produced.

Hence, the correct answer is option (a).