ICSE Class 10 Heat — Mock Test (2027)

Free online mock test for Heat (ICSE Class 10 Physics) — 20 competency-based questions based on the latest CISCE 2027 syllabus, with instant marking. Try the samples below, then take the full test free.

Sample questions

1. 1.In an experiment, 17 g of ice is used to bring down the temperature of 40 g of water at 34°C to its freezing temperature. The specific heat capacity of water is 4·2 J g⁻¹ K⁻¹. Calculate the specific latent heat of ice. State one important assumption made in the above calculation.
2. 2.Why do wine or juice bottles submerged in water remain safe from freezing in very cold countries?
   • A.Water freezes first, forming an insulating ice layer around the bottles.
   • B.Water releases a large amount of heat as it cools, preventing the bottles from freezing.
   • C.Water absorbs cold from the bottles, keeping them at a constant temperature.
   • D.Water’s low thermal conductivity slows down heat loss from the bottles.
3. 3.What mass of a liquid A of specific heat capacity 0.84 J g⁻¹ K⁻¹ at a temperature 40°C must be mixed with 100 g of a liquid B of specific heat capacity 2.1 J g⁻¹ K⁻¹ at 20°C, so that the final temperature of the mixture becomes 32°C?
   • A.125 g
   • B.250 g
   • C.375 g
   • D.500 g
4. 4.Why does a hot cup of tea get cooled on adding sugar to it?
   • A.Sugar lowers the boiling point of the tea.
   • B.Sugar absorbs latent heat of fusion from the tea to dissolve.
   • C.Sugar reacts chemically with tea, releasing cold energy.
   • D.Sugar increases the surface area, allowing faster heat loss.
5. 5.Why does the atmosphere become pleasantly warm when lakes start freezing?
   • A.Ice absorbs heat from the air
   • B.Latent heat is released during freezing
   • C.Water conducts heat better than ice
   • D.The sun heats the ice directly