Which of the following elements will not liberate hydrogen gas with acids?

Zinc

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Sulphur

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Phosphorus

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Aluminium

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Solution

The correct options are
B Sulphur
C Phosphorus
Generally, metals react with acid to produce metal salt and hydrogen gas. The reaction is represented as:

$Metal + Acid \to Metal salt + Hydrogen gas$

But, non-metals don't react with acids at all. So, sulphur and phosphorus will not liberate any gas.

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