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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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LAKHMIR SINGH & MANJIT KAUR-CHEMICAL REACTIONS AND EQUATIONS -Exercise
  1. Write the balanced equation for the following chemical reactions. (i...

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  2. When potassium nitrate is heated. It decomposes into potassium nitrite...

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  3. (a) What is meant by a chemical reaction ? Explain with the help of an...

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  4. (a) State the various characteristics of chemical reactions. (b) sta...

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  5. (a) What do you understned by exothermic and endothermic reactions ? ...

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  6. One of the following does not happen during a chemical reaction. This ...

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  7. Which of the following does not involve a chemical reaction?

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  8. You are given the solution of lead nitrate. In order to obtain a yello...

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  9. An acid which can decolourise purple coloured potassium permanganate s...

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  10. The chemical reaction between two substances is characterised by a cha...

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  11. The chemical reaction between quicklime and water is characterised by ...

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  12. One of the following is an endothermic reaction. This is :

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  13. Which of the following is not an endothermic reaction ?

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  14. One of the following is an exothermic reaction. This is

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  15. The chemical equations are balanced to satisfy one of the following la...

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  16. When the solution of substance X is added to a solution of potassium i...

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  17. When water is added gradually to a white solid X, a hissing sound is h...

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  18. When metal X is treated with a dilute acid Y, then a gas Z is evolved ...

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  19. A silver-white metal X taken in the form of ribbon, when ignited, burn...

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  20. A metal X forms a salt XSO(4). The sale XSO(4) forms a clear solution ...

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