An element E is burned in air. A white solid oxide is formed.
The oxide is tested with damp red litmus paper. The paper turns blue
What is element E?

Option A is correct.

Element E is Calcium.

Explanation:

On combustion in air, element E forms a solid, white oxide which turns red litmus paper blue.

Turning a damp red litmus paper blue, shows that the oxide of element E is basic as only basic/alkaline substances turn red litmus paper blue.

Only metals, group I and group II metals form basic/alkaline oxides.

Amongst the options provided, only Calcium is a metal, and it is a well known group II metal too at that, hence, it is the correct option

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