Direction: Four substances were tested for their electrical conductivity. The results are shown in the table. Study the table and answer the following questions. | |||
Substance | Bulb | Substance at Cathode | Substance at Anode |
P | Lights up | Aluminium | Oxygen |
Q | Lights up | Nothing | Nothing |
R | Does not light up | Nothing | Nothing |
S | Lights up | Hydrogen | Carbon dioxide |
A) Because Q is non-electrolyte.
B) Because Q is an element which remains unchanged when it conducts electricity.
C) Because Q is an electrolyte that conducts electricity when it is in the molten state.
D) Because Q is a poor conductor of electricity.
Correct Answer: B
Solution :
Q must be silver, copper, mercury and other metals.You need to login to perform this action.
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