In which of the following molecules is the bond length the shortest?

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Question: In which of the following molecules is the bond length the shortest?

Options:

Correct Answer: C2

Solution:

C2 has a triple bond between the two carbon atoms, resulting in the shortest bond length compared to the others.

In which of the following molecules is the bond length the shortest?

In which of the following molecules is the bond length the shortest?

Step 1: Understand that bond length refers to the distance between the nuclei of two bonded atoms.
Step 2: Recognize that different types of bonds (single, double, triple) have different lengths.
Step 3: Know that triple bonds are shorter than double bonds, which are shorter than single bonds.
Step 4: Identify the molecule C2, which has a triple bond between two carbon atoms.
Step 5: Compare C2 with other molecules that may have single or double bonds.
Step 6: Conclude that since C2 has a triple bond, it has the shortest bond length among the options.

Bond Length and Bond Order – The bond length is inversely related to the bond order; triple bonds are shorter than double or single bonds.