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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
Fill in the blank
change in which the substance can be brought back to its original state is called a ............... change.
State the various conditions that favour the process of evaporation.
What role does energy play in initiating a chemical change ?
What are reversible and irreversible changes ? Give one example for each.
State whether the following is physical or chemical changes.
lightning —
Fill in the blank with the appropriate word of the statement given below:
Germination of seeds is considered a __________ change.
Name the following:
The final product of the physical change involved during the ‘melting of a piece of wax’.
Name the following:
The type of change physical or chemical involved – ‘when a substance undergoes a change in state, colour or size’.
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. |
______ is the Universal Solvent.
