Published by:
CGP EDU Academic Team
Published on: August 14, 2026
For the reaction
Two moles each of 
and 
were taken into a 1L flask. The following must always be true when the system attained equilibrium:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
From the equation, it is clear that 2 moles of 
combine with one mole of 
. Let at
equilibrium " 
" moles of 
have reacted.
This means that 2a moles of A have reacted
Equilibrium concentration of 
Equilibrium concentration of 
Hence; 
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