MPTET Biology Exam - 15-3-2025

Question 1:

On which property of colloids was the ultra-microscope based?

• 1. Brownian motion
• 2. Tyndall effect
• 3. Electrokinetic motion
• 4. Sedimentation

Answer: Tyndall effect

Question 2:

_______ is the only method of heat transfer that does not require a material medium.

• 1. Conduction
• 2. Heat pumping
• 3. Convection
• 4. Radiation

Answer: Radiation

Question 3:

If the amplitude of vibration is increased three times from its initial value, the intensity of sound will be:

• 1. Twice
• 2. Six times its actual value
• 3. Three times its actual value
• 4. Nine times its actual value

Answer: Nine times its actual value

Question 4:

In an electric cell, energy is stored in the form of:

• 1. Charges
• 2. Heat energy
• 3. Chemical energy
• 4. Atomic energy

Answer: Chemical energy

Question 5:

Select the statement that is false:

• 1. Sound travels faster in metals than in air.
• 2. Sound can be easily transmitted through a vacuum.
• 3. Sound can be produced by vibration of an air column.
• 4. Sound can be easily transmitted through any medium.

Answer: Sound can be easily transmitted through a vacuum.