A solid piece of sodium reacts violently with water.

Decomposition

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Synthesis

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Combustion

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Single replacement

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Double replacement

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Solution

The correct option is D Single replacement
When sodium react with water, it forms sodium hydroxide and hydrogen gas is evolved. The reaction is highly exothermic and heat evolved is more than that of ignition temperature of hydrogen hence it catches fire.

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Similar questions

Assertion:- Sodium metal reacts violently with water and burns with a yellow flame.

Reason:- A large amount of heat is generated and hydrogen evolved immediately catches fire.

X e F_{4}

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