The melting point of a substance is 0 deg C and its boiling point is 100 deg C at atmospheric pressure. At room temperature the state of the substance is _____.

solid

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liquid

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gas

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plasma

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Solution

The correct option is B liquid
The substance described in question is water and its state at room temperature is liquid. A substance is said to be a solid if its melting point is above room temperature under atmospheric pressure. A substance is said to be a liquid if its melting point is below room temperature and boiling point is above room temperature. A substance is said to be a gas if its boiling point is below room temperature under atmospheric pressure.

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