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प्रश्न
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 |
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उत्तर
| Column 1 | Column II | ||
| (a) | Large crystals | (iv) | Sugar candy (Mishri) |
| (b) | Depositing a layer of zinc on iron | (vi) | Galvanisation |
| (c) | Souring of milk | (v) | Chemical change |
| (d) | Carbon dioxide | (i) | Turns lime water into milky |
| (e) | Iron oxide | (iii) | Rust |
| (f) | Dissolving common salt in water | (ii) | Physical change |
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संबंधित प्रश्न
Classify the following changes as physical or chemical:-boiling
Fill in the blank
Chemical change occurs as a result of __________ between two substances.
State whether the following is physical or chemical changes.
growing of a piglet into a pig —
Which of the following are chemical changes ?
- decaying of wood
- burning of wood
- sawing of wood
- hammering of nail into wood
Select the chemical changes from the following list of changes
Boiling of milk.
Give the reason why the following is considered as chemical changes.
Copper carbonate on heat gives copper oxide and carbon dioxide.
Give the reason why the following is considered as chemical changes.
A piece of magnesium strip is dropped into a beaker containing dilute hydrochloric acid.
Classify the following changes as physical and chemical changes
A rough piece of wood is sanded and polished resulting in change in texture, Rusting of a iron nail, Painting the grill, Bending a paper clip, Pounding silver into thin plate, Rolling the chappathi dough into thin wire, Occurrence of day and night, eruption of volcano, burning of matchstick, dosa from the batter, blinking of eyelids, occurrence of a thunderstorm, rotation of the earth, formation of eclipses.
| Sr. No. | Physical changes | Chemical changes |
| 1. | ||
| 2. |
Give two examples for the following case:
Physical changes which are reversible
Explain the characteristics of physical change with examples.
