Question
Three metal compounds, J, K and L, are heated using a Bunsen burner.
The results are shown.
J colourless gas produced, which relights a glowing splint
K colourless gas produced, which turns limewater milky
L no reaction
Which row identifies J, K and L?
Answer/Explanation
Ans:
C
Question
Which statements about the general properties of metals are correct?
- They are good conductors of heat and electricity.
- They have low melting points.
- They react with dilute acids to form a salt and water.
- They react with oxygen to form basic oxides.
A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4
Answer/Explanation
Ans:
B
Question
The electronic structure of element Z is 2,8,1.
Which statements about Z are correct?
- It is a metal.
- It has two outer-shell electrons.
- It is in Period 3.
A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 only
Answer/Explanation
Ans:
C
Question
Which row explains why copper is a good conductor of electricity at room temperature?
Answer/Explanation
Ans:
B