Assertion : Stannous chloride gives grey prec | vedclass

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(C) $Sn^{2+}$ is a strong reducing agent and it gets oxidized to $Sn^{4+}$.The reaction with mercuric chloride $(HgCl_2)$ proceeds as follows:$2HgCl_2

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If the Assertion is correct but Reason is incorrect.

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(C) $Sn^{2+}$ is a strong reducing agent and it gets oxidized to $Sn^{4+}$.The reaction with mercuric chloride $(HgCl_2)$ proceeds as follows:$2HgCl_2 + SnCl_2 	o Hg_2Cl_2 + SnCl_4$ (white precipitate)$Hg_2Cl_2 + SnCl_2 	o 2Hg + SnCl_4$ (grey precipitate of metallic mercury)Thus,the Assertion is correct because $SnCl_2$ acts as a reducing agent,not an oxidizing agent. Therefore,the Reason is incorrect.

Assertion : Stannous chloride gives grey precipitate with mercuric chloride,but stannic chloride does not do so.
Reason : Stannous chloride is a powerful oxidising agent which oxidises mercuric chloride to metallic mercury.

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Assertion : Stannous chloride gives grey precipitate with mercuric chloride,but stannic chloride does not do so.Reason : Stannous chloride is a powerful oxidising agent which oxidises mercuric chloride to metallic mercury.