Jamb Chemistry Past Questions and Answers

Question 1766:

• JAMB 2014

In a chemical reaction, the change in concentration of a reactant with time is

A. Entropy of reaction
B. Enthalpy of reaction
C. Rate of reaction
D. Order of reaction

Question 1767:

• JAMB 2014

Cr ₂O\(\frac{2 -}{7}\) (aq) + H ₂O(1)⇌ 2CrO \(\frac{2 -}{4}\) (aq) + 2H ⁺ (aq)
What happens to the reaction above when the hydrogen ion concentration is increased?

A. More of the products will be formed
B. The reaction will not proceed
C. The equilibrium position will shift to the right
D. The equilibrium position will shift to the left.

Question 1768:

• JAMB 2014

Which of the following will shift to the left from dilute tetraoxosulphate (VI) acid?

A. Lead
B. Magnesium
C. Cpper
D. Gold

Question 1769:

• JAMB 2014

The gas that is removed by the water in the flask is

A. O ₂
B. SO ₂
C. HCI
D. H ₂

Question 1770:

• JAMB 2014

Fluorine does not occur in the free state in nature because

A. It is a poisonous gas
B. It belongs to the halogen family
C. It is inert
D. Of its high reactivity