For the following three reactions I, II and III, equilibrium constants are given I. ${\rm{CO}}\left( {\rm{g}} \right) + {{\rm{H}}_2}{\rm{O}}\left( {\rm{g}} \right)\leftrightharpoons{\rm{C}}{{\rm{O}}_2}\left( {\rm{g}} \right) + {{\rm{H}}_2}\left( {\rm{g}} \right);{K_1}$ II. ${\rm{C}}{{\rm{H}}_4}\left( {\rm{g}} \right) + {{\rm{H}}_2}{\rm{O}}\left( {\rm{g}} \right)\leftrightharpoons{\rm{CO}}\left( {\rm{g}} \right) + 3{{\rm{H}}_2}\left( {\rm{g}} \right);{K_2}$ III. ${\rm{C}}{{\rm{H}}_4}\left( {\rm{g}} \right) + 2{{\rm{H}}_2}{\rm{O}}\left( {\rm{g}} \right)\leftrightharpoons{\rm{C}}{{\rm{O}}_2}\left( {\rm{g}} \right) + 4{{\rm{H}}_2}\left( {\rm{g}} \right);{K_3}$ Which of the following relations is correct?

NEET UG CHEMISTRY MCQ: Equilibrium

1 Medium

1 of 1

Analyzing +4 | -1

For the following three reactions I, II and III, equilibrium constants are given
I.

\mathrm{CO}\left( \mathrm{g} \right) + {\mathrm{H}_2}\mathrm{O}\left( \mathrm{g} \right)\leftrightharpoons\mathrm{C}{\mathrm{O}_2}\left( \mathrm{g} \right) + {\mathrm{H}_2}\left( \mathrm{g} \right);{K_1}

II. 

\mathrm{C}{\mathrm{H}_4}\left( \mathrm{g} \right) + {\mathrm{H}_2}\mathrm{O}\left( \mathrm{g} \right)\leftrightharpoons\mathrm{CO}\left( \mathrm{g} \right) + 3{\mathrm{H}_2}\left( \mathrm{g} \right);{K_2}

III. 

\mathrm{C}{\mathrm{H}_4}\left( \mathrm{g} \right) + 2{\mathrm{H}_2}\mathrm{O}\left( \mathrm{g} \right)\leftrightharpoons\mathrm{C}{\mathrm{O}_2}\left( \mathrm{g} \right) + 4{\mathrm{H}_2}\left( \mathrm{g} \right);{K_3}

Which of the following relations is correct?
 

View answer and explanation

Correct option: C

{K_3} = {K_1}{K_2}

Option C (K₃ = K₁K₂) is correct because reaction III can be obtained by adding reactions I and II. When reactions are added, their equilibrium constants are multiplied.

NEET UG CHEMISTRY MCQ: Equilibrium

More Questions from Equilibrium