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Reactive metals on reaction with-----(i)------form corresponding dioxide which are-----(ii)------- in nature as they turn -------(iii)-------litmus to------(iv)---------. Such metals on reaction with acid liberate ------(v)------- gas which is formed by production ------(vi)--------of sound when a burning matchstick is brought near the mouth of test tube containing reaction.
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cool water In case of cut, wash the wound with cold water
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