Question

A metal X present in chlorophyll is heated in air. It reacts with oxygen and forms a white coloured substance. This white coloured substance when tested with moist red litmus turns the litmus blue.

Answer 1

Answer:

Explanation:X is Mg

And the white substance is MgO which is basic in nature and turns red litmus blue

Answer 2

Answer:

• The metal is Magnesium.

Explanation:

• Magnesuim is a metal which is found in the chlorophyll of the plant.

• When magnesium is heated in the air it forms a white coloured substance which is magnesium oxide. ( MgO).

Mg + O2 ---------> MgO.

• This white coloured substance or the magnesium oxide reacts with the water present in the moist red litmus to form magnesium hydroxide

MgO + H2O ---------- > Mg( OH)2.

• It turns the red litmus to blue because the metallic hydroxide are basic in nature. And when a basic solution is tested using red litmus it turns red litmus into blue.