The table shows the melting points, boiling
points and electrical properties of
the six substances A to F.
substance melting point /
A
B
C
D
E
F
961
113
0
803
-5 to -10
-85
°
Dolling point/
2193
444
100
1465
102 to 105
-60
°
electrical conductor
at room
temperature
good
does not conduct
electrical
conductor of
substance
dissolved in water
very poor
does not conduct
good
good
good
does not conduct does not dissolve
.[1]
does not dissolve
does not dissolve
(i) Which three substances are solids at room
temperature?
very poor
[1]
(ii) Which one is an ionic compound?
…….…….…………….. [1]
(iii) Which one is a gas at room temperature?
...[1]
(iv) Which two substances are liquids at room
temperature?