When magnesium ribbon is burnt in air, then identify the type of reaction and colour of ash formed.

Q. When magnesium ribbon burns in the air, it forms white ash. The chemical name of white ash is:

Q. Magnesium ribbon when burnt in air forms ash. The chemical composition of the ash formed and the change involved is:

Q. A student carries out the decomposition reaction of lead nitrate to form three simpler substances. One of the substances formed during this reaction is a brown coloured gas whereas another substance formed is a yellow coloured solid.
(a) What is the colour of lead nitrate?
(b) How is the decomposition reaction of lead nitrate carried out?
(c) Name the brown coloured gas produced in this reaction.
​(d) Name the yellow solid formed in this reaction.

Q. When magnesium ribbon is burnt in air, the ash formed is ________ in nature.