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A metal on combustion in excess air forms X. X upon hydrolysis with water yields H2O2 and O2 along with another product. The metal is : (1) Rb (2) Li (3) Mg (4) Na |
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Answer» The correct option (1) Rb Explanation: Rb(s) + O2(g) → RbO2(s) 2RbO2(s) + 2H2O(l) → 2RbOH + H2O2 + O2. On combustion in excess of air, lithium forms mainly the oxide, Li2O, Sodium form the peroxide Na2O2 whilst K, Rb, Cs form the superoxides MO2. |
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