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Which of the following statements is incorrect?

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Sodium and potassium in air get tarnished due to the formation of a layer of oxide or carbonates

Sodium and potassium are soft and silvery white metals

Sodium and potassium are kept under kerosene to avoid the contact with air and moisture

Sodium and potassium burn in dry oxygen (excess) giving peroxides

answer is C.

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Detailed Solution

Sodium and potassium burn in dry oxygen (excess) giving peroxides and superoxides respectively.

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