Which of the following metals exists in liquid state?

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RRB NTPC - 2019

General Science

Which of the following metals exists in liquid state?

This question was previously asked in

RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)

Calcium

Potassium

Sodium

Mercury

The correct answer is

Mercury

Mercury is correct.

Mercury (Hg) is the only metal that is a liquid at room temperature. Its melting point is about −38.8 °C, so it stays liquid under ordinary conditions, which is why it was long used in thermometers and barometers.

Calcium, potassium and sodium are all solid metals at room temperature; sodium and potassium are soft enough to cut with a knife but are not liquids.

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