Question

For the reaction
$A\left(g\right)+B\left(g\right)\rightleftharpoons 2C\left(g\right)$
The equilibrium concentration of A and B each is $0.2mol{L}^{-1}$ and concentration of C is observed as $0.60mol{L}^{-1}$ Equilibrium constant $K_c$ will be :

• A. 9
• B. 18
• C. 6
• D. 24

Answer 1

The correct option is A 9

Since equilibrium concentrations are given:
$A+B\rightleftharpoons 2C0.20.20.6K_c=\frac{[C{]}^2}{\left[A\right]\left[B\right]}\text{putting the values,}{K}_c=\frac{[0.6{]}^2}{\left[0.2\right]\times \left[0.2\right]}=9K_c=9$