Question
Different types of steel alloys are manufactured by changing the percentage of carbon in the alloy.
The properties of four steel alloys are shown.
Answer/Explanation
Ans: C
Question
Which description of brass is correct?
A alloy
B compound
C element
D non-metal
Answer/Explanation
Ans: A
Question
The diagrams show the structure of two substances used to make electrical conductors.
Which statement correctly describes X and Y?
A. X is a pure metal and Y is a compound.
B. X is a pure metal and Y is an alloy.
C. X is a solid and Y is a liquid.
D. X is harder and stronger than Y.
Answer/Explanation
Ans:
B
Question
Which statements about the metal zinc are correct?
1 It is extracted from the ore bauxite.
2 It is used to galvanise steel.
3 It is used to make the alloy brass.
4 It reacts with dilute hydrochloric acid to produce hydrogen gas.
A 2 and 3 only B 1, 2 and 4 C 1, 3 and 4 D 2, 3 and 4
▶️Answer/Explanation
Ans:D