Metals and their compounds - Jamb Chemistry Past Questions and Answers

Question 56:

• JAMB 1992

Which of the following combination of gases is used for metal welding? i. Oxygen and ethyne, ii. Hydrogen and ethyne, iii. Hydrogen and oxygen, iv. Ethyne, hydrogen and oxygen.

A. I and ii
B. Ii and iv
C. I and iii
D. Ii and iv

Question 57:

• JAMB 1992

Duralumin consists of aluminium, copper, ?

A. Zinc and gold
B. Lead and maganese
C. Nickle and silver
D. Manganese and magnesium

Question 58:

• JAMB 1993

Bronze is an alloy of?

A. Silver and copper
B. Silver and gold
C. Copper and nickle
D. Copper and zinc
E. Copper and tin

Question 59:

• JAMB 1994

Which of the following is NOT true of metals?

A. They are good conductors of electricity
B. They ionize by electron loss
C. Their oxides are acidic
D. They have high melting points

Question 60:

• JAMB 1997

Which of the additives could improve the quality of steel?

A. Silicon
B. Sulphur and phosphorus
C. Carbon
D. Chromium and nickel