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Question

BeCO3 decomposes at low temperature. To avoid its decomposition, which gas will be placed in the atmosphere?
  1. N2
  2. He
  3. CO2
  4. Ne

A
He
B
N2
C
CO2
D
Ne
Solution
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On decomposition of BeCO3 , it gives CO2 .
So according to Le-Chatelier principle, if we place CO2 in the atmosphere then decomposition decreases.

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