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A metal “X” present in the common salt. When we add small piece of “X” to water, what changes you notice.

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Exothermic reaction, temperature increased

Resultant solution is basic in nature

H_{2}

- gas evolved

All the above

answer is D.

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Detailed Solution

The X is sodium and when sodium is added to water the changes that we notice are exothermic reactions, the temperature increases.

The resultant solution is basic in nature.

$H_{2}$ is gas evolved during the reaction.

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