The number and type of bonds between two carbon atoms in \( \mathrm{CaC}_{2} \) are: (A) one sig...

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The number and type of bonds between two carbon atoms in \( \mathrm{CaC}_{2} \) are:
(A) one sigma \( (\sigma) \) and one pi \( (\pi) \) - bond
(B) one sigma \( (\sigma) \) and two pi \( (\pi) \) - bonds
(C) one sigma ( \( \sigma \) ) and one and a half pi \( (\pi) \) - bond
(D) one sigma \( (\sigma) \) - bond
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