Silver and gold do not react with oxygen even at a high temperature because they are:

Highly reactive

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Highly unreactive

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Noble gases

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Moderately reactive

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Solution

The correct option is B Highly unreactive
Gold and silver are highly unreactive in nature. Hence they do not react with oxygen at very high temperature and hence can maintain their shiny brilliance over extended periods of time. Due to this property they are extensively used in making of ornaments.

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