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  • 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 continues to burn and forms a compound Y.

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 continues to burn and forms a compound Y.

(a) Write the chemical formulae of X and Y.

(b) Write a balanced chemical equation, when X is dissolved in water.

Answers (1)

(a) 2Mg + O_2 \rightarrow 2MgO

Compound X: MgO        [Magnesium Oxide]

Compound Y:  Mg_{3}N_{2}      [Magnesium Nitride]

(b) If Magnesium Oxide is dissolved in water, the product is Magnesium Hydroxide

MgO + H_{2}O \rightarrow Mg(OH)_{2}

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