Question

Statement 1: The equilibrium constant for the reaction $CaS{O}_4.5H_{2}O\left(s\right)\rightleftharpoons CaS{O}_{4}3H_{2}O\left(s\right)+H_{2}O\left(g\right)$
$K_c=\frac{\left[CaS{O}_{4}3H_{2}O\right]{\left[H_{2}O\right]}^2}{\left[CaS{O}_{4}5H_{2}O\right]}$
Statement 2: Equilibrium constant is the ratio of the product of molar concentration of the substances produced to the product of the molar concentrations of reactants with each concentrations term raised to the power equal to the respective stoichiometric constant

• A. If both Statement 1 and Statement 2 are true and the statement 2 is the correct explanation of the statement 1 .
• B. If both Statement 1 and Statement 2 are true but statement 2 is not the correct explanation of the statement 1 .
• C. If Statement 1 is true but Statement 2 is false.
• D. If Statement 1 is false but Statement 2 is true.

Answer 1

Answer: (D)

Statement 1 is false but statement 2 is true. $K_c={\left[H_{2}O\right]}^2$ because concentration of solids is taken to be unity.