Chemical equilibrium - Jamb Chemistry Past Questions and Answers

Question 36:

• JAMB 2017

For a general equation of the nature xP + yQ → mR + nS, the expression for the equilibrium constant is

A. K [P]^x [Q]^y
B. \(\frac{[P]^x [Q]^y}{[R]^m [S]^n}\)
C. \(\frac{[R]^m [S]^n}{[P]^x [Q]^y}\)
D. \(\frac{m[R] n[S]}{x[P] y[Q] }\)

Question 37:

• JAMB 2018

mE + nF -----> pG + qH
In the equation shown, the equilibrium constant is given by?

A. \(\frac{[E]^m[F]}{[G]^p[H]^q}\)
B. \(\frac{[E][F]}{[G][H]}\)
C. \(\frac{[G]^p[H]^p}{[E]^m[F]^n}\)
D. \(\frac{[G][H]}{[E][F]}\)

Question 38:

• JAMB 2018

2SO\(_2\) \(_{(g) }\)+ O\(_2\) \(_{(g) }\) ↔ 2SO\(_3\)\(_{(g) }\) ΔH = -395.7kJmol\(^{-1}\)
In the equation, an increase in temperature will shift the equilibrium position to the

A. Left and equilibrium constant decreases
B. Left and equilibrium constant increases
C. Right and equilibrium constant increases
D. Right and equilibrium constant decreases

Question 39:

• JAMB 2018

3H\(_{2(g)}\)+ N2 ⇔ 2NH\(_{3(g)}\) ; H= -ve
In the reaction above, lowering of temperature will

A. Have no effect on the equilibrium position
B. Increase the rate of both the forward and reverse reactions equally
C. Favour the forward reaction
D. Favour the reverse reaction

Question 40:

• JAMB 2019

Which of the following metals is the most essential in the regulation of blood volume, blood pressure and osmotic equilibrium?

A. Zinc
B. Manganese
C. Sodium
D. Iron