OMTEX CLASSES: An element X on reacting with oxygen forms an oxide X2O. This oxide dissolves in water and turns red litmus blue. State whether element X is a metal or a non

An element X on reacting with oxygen forms an oxide X2O. This oxide dissolves in water and turns red litmus blue. State whether element X is a metal or a non – metal. Explain with proper example.

Ans. X is a metal like Na or K.

Sodium combines with oxygen, forms sodium oxide (Na₂O). Sodium oxide dissolves in water and forms an alkali, sodium hydroxide (NaOH). In sodium hydroxide, red litmus turns blue.

2Na	+	O₂	→	Na₂O
Sodium		Oxygen		Sodium Oxide

Na₂O	+	H₂O	→	2NaOH
Sodium oxide		water		Sodium hydroxide

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An element X on reacting with oxygen forms an oxide X2O. This oxide dissolves in water and turns red litmus blue. State whether element X is a metal or a non – metal. Explain with proper example.