1. [B] All metal oxides react with water to give salt and acid Remember, that - most of the oxides of metal are insoluble in water but some of these (such as Na₂O, CaO) dissolve in water to form alkalis, not salt and acid.

    [B] All metal oxides react with water to give salt and acid
    Remember, that – most of the oxides of metal are insoluble in water but some of these (such as Na₂O, CaO) dissolve in water to form alkalis, not salt and acid.

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