Question

A magnesium ribbon is burnt in oxygen to give a white compound X accompanied by emission of light . If the burning ribbon is now placed in an atmosphere of nitrogen , it continuous to burn and forms a compound Y. ( 1 ) Write the chemical formulae of X and Y. ( ii ) Write the balanced chemical equation when X is dissolved in water .​

Answer 1

Answer:

When oxides of alkaline earth metal dissolve in water, the hydroxides of alkaline earth metal form. When a magnesium ribbon is burnt in oxygen a white compound magnesium oxide MgO is formed accompanied by the emission of light. So, compound 'X' is magnesium oxide.

Explanation:

Answer 2

Answer:

X = MgO; magnesium oxide and Y = $Mg_{3} N_{2}$

Explanation:

1. Magnesium ribbon burns in oxygen  to form magnesium oxide (MgO).

Therefore X is MgO.

Burning magnesium ribbon reacts with nitrogen to form

magnesium nitride.

Therefore Y is $Mg_{3} N_{2}$.

2. $MgO + H_{2} O$ → $Mg(OH)_{2}$