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Question

A. What is a neutralization reaction? Explain with an example.
B.
Define photochemical reaction and electrochemical reaction with an example.

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Solution

A.

The reaction between an acid and bases is called a neutralization reaction. The result of the reaction is salt and water.

For example, when hydrochloric acid(acid) and sodium hydroxide(base) react they form sodium chloride(salt) and water. Also, heat evolves.
NaOH + HCl NaCl + H2O
B.

Photochemical reaction: It is a reaction which occurs with absorption of light energy.

For example: Photosynthesis
6CO2 + 6H2O C6H12O6+ 6O2

Electrochemical reaction: It is a reaction which occurs with absorption of electrical energy.

For example: Electrolysis of water
2H2O 2H2 + 2O2


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