Jamb Chemistry Past Questions and Answers

Question 221:

• JAMB 1981

In the reaction
C + 2HNO₃ → CO₂ + NO₂ + NO + H₂O nitric acid is acting as?

A. A reducing agent
B. A nitrating agent
C. An oxidizing agent
D. A catalytic agent
E. A neutralizing agent

Question 222:

• JAMB 1981

The brown coloration in nitric acid prepared in the laboratory can be removed by?

A. Heating the acid
B. Bubbling air through the acid
C. Cooling the acid
D. Adding a decolorizing agent
E. Adding a base

Question 223:

• JAMB 1981

Which of the following processes takes place during electrolysis?

A. Positive ions are discharged at the anode bby gaining sufficient electrons to become neutral
B. Negative ions are dicharged at the anode by gaining suficient electrons to become neutral
C. Positive ions are discharged at the anode by losing sufficient electrons to become neutral
D. Negative ions are discharge at the anode by losing sufficient electrons to become neutral
E. Nothing happens

Question 224:

• JAMB 1981

In the preparation of ammonia, which of the following is used as the drying agent?

A. CaO
B. CaCI₂
C. Conc. H₂SO₄
D. P₂O₅
E. H₃PO₄

Question 225:

• JAMB 1981

Which of the following can have an isomer?

A. C₂H₄
B. C₄H₁₀
C. C₃H₈
D. C₂H₆
E. C₆H₆