Question

To use Gay-Lussac's Law, which of the following needs to remain constant?

• A. Volume and the number of moles of a gas
• B. Pressure and temperature
• C. Temperature and the number of moles of a gas
• D. Pressure and the number of moles of a gas
• E. Temperature and volume

Answer 1

The correct option is A Volume and the number of moles of a gas

$P\propto T$
At constant volume and number of moles of a gas, the pressure is directly proportional to the absolute temperature.

Hence, option $A$ is correct.