Multiple choice

What would happen if a solid substance is heated for a while?

  1. Kinetic energy among the particles will decrease.

  2. The particles will show vibratory motion.

  3. The intermolecular bonds among the particles will get strengthened.

  4. The forces of attraction among the particles will increase.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

On increasing the temperature of solids, the kinetic energy of the particles increases. Due to the increase in kinetic energy, the particles start vibrating with greater speed. The energy supplied by heat overcomes the forces of attraction between the particles. The particles leave their fixed positions and start moving more freely. A stage is reached when the solid melts and is converted into a liquid.

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