Chromium metal is immersed in an aqueous solution of cobalt(ii) chloride.

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Chromium metal is immersed in an aqueous solution of cobalt(ii) chloride.

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Explanation:

A single displacement reaction is defined as the reaction in which a more reactive element removes a less reactive element from its chemical reaction. Metal reactivity is determined by a series called a reactivity series. The metals located above in the series are more reactive than the metals below in the series