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(a) What is meant by a chemical reaction...

(a) What is meant by a chemical reaction ? Explain with the help of an example
(b) Given one example each of a chemical reaction characterised by:
(i) evolution of a gas
(ii) change in colour
(iii) formation of a preopitate
(iv) change in temperature
(v) change in state.

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DINESH PUBLICATION-CHEMICAL REACTIONS AND EQUATIONS -Short Answer Questions
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  9. Which among the following changes are exothermic or endothermic in nat...

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  10. Identify the reducing agent in the following reactions. (a) 4NH(3)+...

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  11. Identify the oxidising agent (oxidant) in the following reactions {:...

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  12. write the balanced chemical equations for the following reaction. (a...

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  13. A solution of potassium chloride when mixed with silver nitrate soluti...

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  14. Ferrous sulphate decomposes with the evolution of a gas having a char...

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  15. Why do fire flies glow at night?

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  16. Grapes hanging on the plant do not ferment but after being plucked fro...

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  17. Which among the following are physical or chemical changes? (a) Eva...

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  18. During the reaction of some metals with dilute hydrochloric acid, foll...

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  19. A substance X, which is an oxide of a group 2 element, is used intensi...

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  20. Write a balanced chemical equation for each of the following reactions...

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