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प्रश्न
State what is meant by the term – interconversion of matter. Is interconversion of matter a physical change or a chemical change.
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उत्तर
Interconversion of matter involves matter changing from one state to another and back to its original state, by change in temperature or pressure. It is a physical change in which one state of matter changes into another state and back again to its original state.
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संबंधित प्रश्न
State whether the following is physical or chemical changes.
heating a mixture of iron filings and sulphur—
Fill in the blank
Changes that occur in nature are called ______
What are man-made changes ?
Classify the Following as a Physical Or a Chemical Change.
Making of a Sugar Solution
Select the chemical changes from the following list of changes
Glowing of an electric bulb.
When ice melts to form water, change occurs in its
Natural changes which take place in nature on their own, are beyond the control of human being.
Two drops of dilute sulphuric acid were added to 1 g of copper sulphate powder and then small amount of hot water was added to dissolve it (step I). On cooling, beautiful blue coloured crystals got separated (step II). Step I and Step II are:
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 |
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Do you think rust is different from iron?
