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Why metallic lusture of aluminium disapp...

Why metallic lusture of aluminium disappears when kept in air?

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Knowledge Check

  • Two solid pieces one of steel and other of aluminium when immersed completely in water have equal weights. When the solid pieces are weighed in air

    A
    the weight of aluminium is half the weight of steel
    B
    steel piece will weigh more
    C
    they have the same weight
    D
    aluminium piece will weigh more

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