NCERT EXEMPLAR-PHYSICAL AND CHEMICAL CHANGES -LONG ANSWER QUESTIONS
- Give two examples for each of the following cases : (a) physical ...
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- Give two examples for Physical changes which are not reversible .
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- Define : Chemical change.
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- Give an example of a chemical reaction for each of the following sit...
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- A gas is evolved when ethanol reacts with sodium. Name the gas evolved...
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- Sound is produced due to
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- If you leave a piece of iron in the open for a few days ,it acquires...
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- Can you change rust back into iron by some simple method ?
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- Do you think formation of rust from iron is a chemical change ?
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- Give two examples of chemical change
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- A students took a solution of copper sulphate in a beaker and put a ...
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- Are these changes chemical in nature , solution of copper sulphate ...
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- Write a word equation for the chemical change solution of copper su...
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