Chemistry and Industry - Jamb Chemistry Past Questions and Answers

Question 156:

• JAMB 2017

Tin is unaffected by air at ordinary temperature due to its

A. Low melting point
B. Weak electropositive character
C. High boiling point
D. White lustrous appearance

Question 157:

• JAMB 2017

The gas that can be collected by downward displacement of air is

A. Chlorine
B. Sulphur (IV) oxide
C. Carbon (IV) oxide
D. Ammonia

Question 158:

• JAMB 2017

In the laboratory preparation of trioxonitrate (V) acid the nitrogen(iv) oxide formed as a by-product is removed by

A. Further heating
B. Adding concentrated H₂SO₄
C. Cooling the acid solution with cold water
D. Bubbling air through the acid solution

Question 159:

• JAMB 2018

An element used in the production of matches is

A. Nitrogen
B. Aluminium
C. Copper
D. Sulphur

Question 160:

• JAMB 2018

In the laboratory preparation of oxygen, the gas cannot be collected by displacement of air because

A. The density of oxygen is greater than that of air
B. The density of air is nearly the same as that of oxygen
C. Oxygen is a component of air
D. Air is an impure substance