A solid substance was tested in the laboratory.
The test results are listed below.
• dissolves in water
• is an electrolyte
• melts at a high temperature
Based on these results, the solid substance could be
(1) Cu (3) C
(2) CuBr2 (4) C6H12O6
Your answer is (2) CuBr2, which dissolves in water, is an electrolyte (sort of the same things except that an electrolyte not only dissolves but is attracted by opposite poles), and melts at high temperatures.
