Clean solid materials are needed to be stored in the vacuum because

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they will react to form complex compound

they will be covered by vapour and CO2 gases

they will be covered by molecules of major air components like O2 and N2

None of the above

answer is C.

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Detailed Solution

Clean solid materials are needed to the stored in the vacuum because they will be covered by molecules of major air components like O2 and N2.

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