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Q.

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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a

Exothermic reaction, temperature increased

b

Resultant solution is basic in nature

c

H2 - gas evolved

d

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.

H2 is  gas evolved during the reaction.

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