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Question

The number and type of bonds in $$C_{2}^{2-}$$ ion in $$CaC_2$$ are :


A
one σ bond and one π-bond
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B
one σ bond and two π-bonds
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C
two σ bonds and two π -bonds
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D
two σ bonds and one π - bond
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Solution

The correct option is B one $$\sigma$$ bond and two $$\pi$$-bonds
$$C_2^{2-}$$ ion $$\longrightarrow$$ $$[C\equiv C]^{2-}$$

Dicarbide ion $$C_2^{2-}$$ has 1 sigma and 2 pi bonds. There are two $$\pi$$ bonds and one $$\sigma$$ bond in a triple bond.

Hence, the correct option is $$(B)$$.

Chemistry

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