Name a chemical change which takes place in presence of:

Heat

Light

Electricity

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1 Answers

Heat:

1. Burning of paper.

2. Cooking of food needs heat.

Light :

1. Formation of food by plants i.e. photosynthesis need light.

2. Hydrogen and chlorine react in presence of light

Electricity:

1. Water breaks into hydrogen and oxygen on passing electricity.

2. Sodium chloride solution breaks up into its components sodium and Chlorine on passing electric current through sodium chloride solution

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