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B
7
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C
4
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D
3
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Solution
The correct option is C 7 When, SnCl2 is added to HgCl2 solution, grey metallic mercury is obtained. Hence, the correct answer is 7. 2HgCl2+SnCl2→Hg2Cl2+SnCl4 Hg2Cl2+SnCl2→2Hg↓(grey)+SnCl4