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An element burns in air to form an oxide. The aqueous solution of this oxide turns blue litmus paper red. State whether the element is a metal or nonmetal. Name one such element.
The aqueous solution of the oxide turns blue litmus paper red. This means the aqueous solution is acidic in nature. Nonmetals react with oxygen to form nonmetallic oxides. They react with water to form acids. Since, the aqueous solution of this oxide is acidic in nature, the element is a nonmetal.
For example, Sulphur is a nonmetal. It will form an oxide called sulphur dioxide which is acidic in nature.
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