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Why are the dihalides of carbon unstable...

Why are the dihalides of carbon unstable but the dihalides of tin and lead are stable?

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All the elements of group-14 (except C and Si) form stable dihalides. Due to inert pair effect, these elements are highly stable in +2 oxidation state. Hence, tin and lead form stable dihalides. On the other hand, carbon is stable in +4 state. Therefore, dihalides of carbon are unstable.
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CHHAYA PUBLICATION-SOME p-BLOCK ELEMENTS-SOLVED WBCHSE SCANNER
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  3. Explain why C Cl4 is not hydrolysed while SiCl4 is hydrolysed.

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