Which observation is inconsistent with the ideal gas law?

Question

When pressure is held constant and volume increases, the temperature increases
When volume is held constant and temperature increases, the pressure increases
When nothing is held constant and pressure and volume both increase, the temperature increases
When temperature is held constant and volume increases, the pressure increases

Answer 1

The observation that is inconsistent with the ideal gas law is:

"When temperature is held constant and volume increases, the pressure increases."

According to the ideal gas law (PV = nRT), if the temperature (T) is held constant and the volume (V) increases, the pressure (P) must decrease, not increase. This is a manifestation of Boyle's Law, which states that pressure is inversely proportional to volume when the temperature is constant.

The other observations are consistent with the ideal gas law.