Name one hygroscopic substance whose physical state does not change by absorbing water.

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Solution

Hygroscopic substances:
(a)These are certain substances which absorb moisture from air without changing their physical state.These substances are called hygroscopic substances.
(b)They may exist in solid or liquid state under normal temperature and pressure.
Examples of hygroscopic substances are calcium oxide(solid),concentrated sulphuric acid(liquid),etc.

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