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

Hope this Helps!!!

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.