Electrical conductance through metals is called electronic conductance and it ______.

decreases with increase in temperature

The correct answer is option 2. decreases with increase in temperature.

Electronic Conductance: In metals, electrical conductance is due to the movement of free electrons through the metal lattice.

Temperature and Vibration: As temperature increases, the metal atoms vibrate more intensely. This increased vibration disrupts the smooth flow of electrons, making it harder for them to move freely.

Increased Resistance: The disruption caused by the vibrating atoms increases the resistance to the flow of electrons. Resistance and conductance are inversely proportional. Therefore, with increasing resistance, the overall conductance of the metal decreases.

So, higher temperatures lead to a decrease in electronic conductance in metals.