Metal X does not give hydrogen gas when allowed to react with cold or hot water but it reacts with steam to form metal oxide and hydrogen gas. Metal X cannot be

Iron

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Aluminium

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Potassium

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Zinc

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Solution

The correct option is C
Potassium
Potassium is a highly reactive metal and reacts violently with cold water. The reaction is so violent and exothermic that the evolved hydrogen immediately catches fire. Therefore, metal ‘X’ cannot be potassium.

Hence, the correct answer is option (c).

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(a) Name a metal for each case:
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Metal X does not give hydrogen gas when allowed to react with cold or hot water but it reacts with steam to form metal oxide and hydrogen gas. Metal X cannot be

The correct option is C PotassiumPotassium is a highly reactive metal and reacts violently with cold water. The reaction is so violent and exothermic that the evolved hydrogen immediately catches fire. Therefore, metal ‘X’ cannot be potassium. Hence, the correct answer is option (c).

The correct option is C
Potassium
Potassium is a highly reactive metal and reacts violently with cold water. The reaction is so violent and exothermic that the evolved hydrogen immediately catches fire. Therefore, metal ‘X’ cannot be potassium.

Hence, the correct answer is option (c).