(b) Figure 1 shows the melting points and the boiling points of four substances, A, B, C and D.
Figure 1
Temperature
in °C
250
200
150-
100
50
0-
<-50
-100
<-150
-200
-250
*
A
B
*
C
Substance
-X
D
Which substance is liquid over the greatest temperature range?
E
Key
x Melting
point
. Boiling
point