Question

Which of the following describes a double bond between two carbon atoms?

Answer 1

Answer: The correct answer is Option 3.

Explanation:

Carbon atom is the 6th element of the periodic table. The valence electrons of this element are 4. This element requires 4 electrons to attain stable electronic configuration.

This element can form single bond, double bond and triple bond will the same element that is carbon.

If more number of bond are formed between the atoms, it means that the bond strength of that bond will be more because the orbitals come closer to each other.

And bond strength is inversely proportional to the bond length.

$\text{Bond strength}\propto \frac{1}{\text{Bond length}}$

Thus, single bond will have the lowest bond strength and highest bond length.

Then, will come double bond which has more bond strength than single bond and shorter bond length than single bond.

Then, will come the triple bond which has more bond strength than double bond and shorter bond length than double bond.

Order for bond length follows:

$C-C>C=C>C\equiv C$

Hence, the correct answer is Option 3.

Answer 2

Im pretty sure the answer is 4 but not 100 percent