A white, powdery substance melts at 996°C. It does not conduct electricity as a solid but is highly conductive when dissolved in water.
Which of the following could be the identity of the solid?
A.
SiC(s)
B.
C12H22O11(s)
C.
LiBr(s)
D.
In(s)
I would go with LiBr.
SiC is carborundum and isn't soluble in water. It does not conduct electricity.
C12H22O11 is sugar. You know a solution of sugar does not conduct electricity.
LiBr is a white powder. A solution of LiBr is highly conductive.
In is a metal and doesn't dissolve in water.