Question

Conductivity of metal decreases with temperature while conductivity of electrolytic conductors :

• A. increases with temperature
• B. slightly decreases with temperature
• C. remains same
• D. slightly increases with temperature

Answer 1

The correct option is A increases with temperature

In metals, conductivity is due to movement of free electrons. When temperature increases, the vibration of metal ions increases. This results in increase in resistance of metal and hence, decrease in conductivity. In electrolytic conductors, the ions are charge carriers and with increase in temperature, ionization increases and hence, conductivity increases.