When magnesium is burnt in air, a new substance is formed which is ______

When a magnesium ribbon is burnt in air, the ash formed is

When a magnesium ribbon is burnt in air, the ash formed is _____.

The substance will expand when __________.

What happens when (i) Magnesium is burnt in air

When a substance is heated, its temperature _____

When magnesium reacts with oxygen, nature of bond formed is …………………..

When iron is exposed to moist air, a reddish brown substance is deposited on it. What is it ? Give its composition.

Assertion (A) :No new substance is formed when water is heated to get steam. Reason (R) : Conversion of water into steam is a physical change.

What happens when alkane is , (i) burnt in air (ii) aromatized (iii) reacted with steam?