Acids, bases and salts - Jamb Chemistry Past Questions and Answers

Question 31:

• JAMB 1984

Which of the following statements is NOT true of carbon monoxide?

A. CO is poisonous
B. CO is readily oxidized at room temperature by air to form CO₂
C. CO may be prepared by reducing CO₂ mixed with coke heated to about 1000^oC
D. CO may be prepared by heating charcoal with a limited amount of O₂
E. CO is a good reducing agent

Question 32:

• JAMB 1984

From the reactions : ZnO + Na₂O \(\to\) NaZnO and ZnO + CO₂ \(\to\) ZnCO₃ it may be concluded that zinc oxide is

A. Neutral
B. Basic
C. Acidic
D. Amphoteric
E. A mixture

Question 33:

• JAMB 1984

An example of a neutral oxide is

A. AL₂O₃
B. NO₂
C. CO₂
D. CO
E. SO₂

Question 34:

• JAMB 1984

Which of the following statements is NOT correct about all four of the acids: HBr, HNO₃, H ₂CO₃ and H₂SO₄? They

A. Dissolve marble to liberate CO
B. Have a PH less than 7
C. Turn blue litmus red
D. Neutralize alkalis to form salt
E. React with magnesium to liberate hydrogen

Question 35:

• JAMB 1984

A piece of sea shell, when dropped into a dilute solution of hydrochloric acid, produces a colourless, odourless gas which turns clear limewater milky. The sea shell contains

A. Sodium chloride
B. Ammonium nitrate
C. Calcium carbonate
D. Calcium chloride
E. Magnesium chloride