Define:

(a) precipitation (b) neutralization

(c) catalyst

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Solution

(a) Precipitation: A chemical reaction in which two compounds in their aqueous state react to form an
insoluble salt as one of the product.
Acid + Base → Salt + WaterExample.
(b) Neutralization: A chemical reaction in which a base or an alkali reacts, with an acid to produce a
salt and water only.
(c) Catalyst: A catalyst is a substance that either increases or decreases the rate of a chemical reaction without itself undergoing any chemical change.

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Define:

1) Oxidation reaction

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3) neutralization reaction

4) precipitation reaction

Define and give one suitable example of each of the following:

(a) Precipitation
(b) Neutralisation

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(a) Chemical bond

(b) Effervescence

(a) Define catalyst.

(b) What are (i) positive catalysts and

(ii) negative cata lysts ? Support your answer wit h one example for each of them.

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