What happens when the milk is left at room temperature during summer?
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EXERCISE
(Question Bank)
Answer the following questions very breifly
1. What happens when the milk is left at room temperature during summer?
2. Write a chemical equation when magnesium is burnt in air to give magnesium
oxide.
3. A substance under goes chemical reactions to produce simpler products,
what type of reaction is this?
4. Why do copper vessels lose their shine when exposed to air?
5. Which gas is produced by the action of dilute hydrochloric acid on zinc
granules?
6. Fe2O3 + 2Al Al2O3 + 2Fe
The above reaction is an example of which type of reaction.
7. Name the type of reaction in which energy is absorbed.
8. Why does the colour of copper sulphate solution change when an iron nail is
dipped into it?
9. Give an example of decomposition reaction which proceeds by absorbing
electric energy.
10. Why do we balance the chemical equation?
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