Chemical Bonding - Result Question 108

####7. The number and type of bonds between two carbon atoms in CaC2 are

(1996, 1M)

(a) one sigma ( σ ) and one pi (π) bonds

(b) one sigma ( σ ) and two pi (π) bonds

(c) one sigma (σ) and one half pi (π) bonds

(d) one sigma (σ) bond

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Answer:

Correct Answer: 7. (b)

Solution:

  1. The carbide (C22) ion has the following bonding pattern:
$$
\overline{C} \equiv \overline{C}: \text { one sigma and two pi bonds. } $$


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