Question

In which of the following cases, conductivity decreases with an increase in temperature?

• A. Fused $NaCl$
• B. $Cd$
• C. $NaOH$
• D. ${NH}_{4}OH$

Answer 1

The correct option is B $Cd$

The electrical conductivity of a conductor will decrease with an increase in temperature. But for acids bases and salts raising the temperature gives more energy to the ions making them move faster, and hence increasing the conductivity.