Q25. Assertion (A) Ar, Au, Ne are elements known as noble gases. These elements accur in native state in nature. Reason (R): All metals except mercury exist as solids at room temperature.
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All metals except mercury exist as solids at room temperatureExplanation:
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Assertion (A) : Ar, Au, Ne are elements known as noble gases. These elements accur in native state in nature.
The assertion is false, this is because. Au is a noble metal, it is not a noble gas. But if it was noble metal and gases then the assertion would have been true.
Reason (R): All metals except mercury exist as solids at room temperature.
The reason is false too. It is true that generally metals are solid exept mercury at room temperature. But murcury isn't the only metal that is liquid at room temperature. Gallium is also a metal which is liquid (at room temperature).
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