Jamb Chemistry Past Questions and Answers

Question 2036:

• JAMB 2018

Sieving is a technique used to separate mixtures containing solid particles of

A. Small sizes
B. Large sizes
C. Different sizes
D. The same size

Question 2037:

• 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 2038:

• JAMB 2018

The situation obtained when a perfect gas expands into a vacuum is

A. ΔH is positive and TΔ S is zero
B. ΔH is positive and T Δ S is negative
C. ΔH is negative and TΔ S is zero
D. ΔH is zero and T Δ S is positive

Question 2039:

• JAMB 2018

The general formula of alkanones is

A. RCHO
B. R\(_2\)CO
C. RCOOH
D. RCOOR

Question 2040:

• JAMB 2018

The alkanoic acid found in human sweat is

A. CH\(_3\)-COOH
B. CH\(_3\)—CH\(_2\)—COOH
C. H-COOH
D. CH\(_3\)