Advertisements
Advertisements
प्रश्न
Fill in the blank
Heat is ________ by a gas during the process of condensation.
रिक्त स्थान भरें
Advertisements
उत्तर
Heat is released by a gas during the process of condensation.
shaalaa.com
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
APPEARS IN
संबंधित प्रश्न
Tick the most appropriate answer.
4. Chemical changes involve
- change in shape.
- change in size.
- change in molecular composition.
- none of these
Write true or false
Burning of sugar is a temporary change.
Tick the most appropriate answer.
Physical changes are
Which of the following are chemical changes ?
- decaying of wood
- burning of wood
- sawing of wood
- hammering of nail into wood
Classify the following as a physical or a chemical change.
Drying of wet clothes
Digestion of food is a physical change.
Sublimation of Iodine is a ______.
Analogy:
Melting of ice: Physical change.
Popping of popcorn: ______.
State whether the following statement is true or false:
Stretching of rubber bands is not a physical change.
Match the items of Column I with the items of Column II.
| Column I | Column II | ||
| (a) | Large crystals | (i) | Turns lime water into milky |
| (b) | Depositing a layer of zinc on iron | (ii) | Physical change |
| (c) | Souring of milk | (iii) | Rust |
| (d) | Carbon dioxide | (iv) | Sugar candy (Mishri) |
| (e) | Iron oxide | (v) | Chemical change |
| (f) | Dissolving common salt in water | (vi) | Galvanisation |
