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.
$N a O H + H C l \to N a C l + H_{2} O$ B.

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

For example: Photosynthesis
$6 C O_{2} + 6 H_{2} O \to C_{6} H_{12} O_{6} + 6 O_{2}$

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

For example: Electrolysis of water
$2 H_{2} O \to 2 H_{2} + 2 O_{2}$

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Define photochemical reaction and electrochemical reaction with an example.

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(b) Electrochemical reaction.

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Question 2

What is a neutralization reaction? Explain with an example.

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