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Match the metal (Column I) with its reaction with oxygen (Column II)Column IColumn IIA. Potassium(i) Does not react event at high temperaturesB. Zinc(ii) Gets coated with black-coloured layer of oxideC. Copper(iii) Does not burn at ordinary temperatureD. Silver(iv) Burns vigorously(a) A-(iv), B-(iii), C-(ii), D-(i)(b) A-(iv), B-(ii), C-(i), D-(iii)(c) A-(iii), B-(ii), C-(i), D-(iv)(d) A-(iv), B-(ii), C-(iii), D-(i) |
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Answer» Correct answer is (a) A-(iv), B-(iii), C-(ii), D-(i) (A → iv) Potassium is highly reactive metal. so it reacts vigorously with oxygen and burn. (B → iii) Zinc does not burn at ordinary temperature because zinc is less reactive so we need to apply heat to make it able to react. (C → ii) Copper metal get coated with black colored layer of oxide - \(2Cu + O_2\) \(\longrightarrow\) \(\overset{2CuO}{\text{black in color}}\) (D → i) Silver metal does not react even at high temperature because silver metal is very less reactive like (Au, pt) so that it does not react even at high temperature. |
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