Which of the following is a soft metal?

Sodium

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Cobalt

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Magnesium

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Iron

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Solution

The correct option is A
Sodium

The explanation for the correct option - (A) Sodium
Sodium -
It is a shiny silvery metal.
It is very soft and can be cut with a knife.
It is highly reactive.
The explanation for the incorrect options -
(B) Cobalt, (C) Magnesium, and (D) Iron are hard metals.
Hence, option (A) is correct. Sodium is a soft metal.

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