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Standard XII

Chemistry

Characteristics of Equilibrium Constant

If 1 mol of A...

Question

If 1 mol of A and 1.5 mol of B and and 0.5 mol of C are placed in 1 litre vessel and allowed to attain the equilibrium. The final concentration of C is 0.7 mol $L^{- 1}$ , the value of $K_{c}$ is;

0.70

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0.46

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0.50

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0.25

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Solution

The correct option is B $0.70$
$A + B \to C$
A B C
Initial 1 1.5 0.5
change 1-x 1.5-x 0.5+x
equilibrium 0.8 1.3 0.7
x = 0.7-0.5 = 0.2
$∴ K_{c} = \frac{[0.7]^{0.5}}{[0.8] * [1.3]^{1.5}} = 0.70$

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If 1 mol of A and 1.5 mol of B and and 0.5 mol of C are placed in 1 litre vessel and allowed to attain the equilibrium. The final concentration of C is 0.7 mol L−1, the value of Kc is;

The correct option is B 0.70 A+B→C A B CInitial 1 1.5 0.5change 1-x 1.5-x 0.5+x equilibrium 0.8 1.3 0.7x = 0.7-0.5 = 0.2 ∴Kc=[0.7]0.5[0.8]∗[1.3]1.5=0.70

If 1 mol of A and 1.5 mol of B and and 0.5 mol of C are placed in 1 litre vessel and allowed to attain the equilibrium. The final concentration of C is 0.7 mol $L^{- 1}$ , the value of $K_{c}$ is;

The correct option is B $0.70$
$A + B \to C$
A B C
Initial 1 1.5 0.5
change 1-x 1.5-x 0.5+x
equilibrium 0.8 1.3 0.7
x = 0.7-0.5 = 0.2
$∴ K_{c} = \frac{[0.7]^{0.5}}{[0.8] * [1.3]^{1.5}} = 0.70$