Q. Which of the following processes exemplify latent heat in daily life?

1. Melting of ice cubes in a glass
2. Heating of water from 25°C to 80°C
3. Boiling of water at 100°C under normal pressure

Select the correct option from the codes given below:
Answer: Only 1 and 3
Notes: Latent heat is absorbed or released during phase changes without a change in temperature. Melting of ice (solid to liquid) and boiling of water (liquid to gas) are phase changes involving latent heat. Heating water from 25°C to 80°C involves sensible heat, where temperature increases, not a phase change. Therefore, statements 1 and 3 are correct.