A scalar quantity is a physical quantity that has only magnitude and no direction. Examples include mass, temperature, volume, speed, energy, and pressure. To identify which quantity is a scalar from a given list, one can look for quantities that do not involve direction. For example:

• Scalar quantities: mass, temperature, speed, volume, energy, pressure
• Vector quantities: force, velocity, acceleration, displacement, torque

If you provide specific options, the scalar quantity among them will be the one that has only magnitude without any directional component.