The partial Lewis structure that follows is for a hydrocar-bon molecule. In the full Lewis structure, each carbon atom satisfies the octet rule, and there are no unshared elec-tron pairs in the molecule. The carbon—carbon bonds are labeled 1, 2, and 3. (a) How many hydrogen at-oms are in the molecule? (b) Rank the carbon–carbon bonds in order of increasing bond length. (c) Which carbon—carbon bond is the strongest one? [Sections 8.3 and 8.8]A C is double bonded (bond 1) right to C, which is single bonded (bond 2) right to C. That C is triple bonded (bond 3) right to C.

See explanation

Explanation:

a) considering the structure of the compound, it has 5 hydrogen atoms. Three are attached to C-1, one is attached to C-2 and 1 is attached to C-4.

b) (bond 2)> (bond 1) >(bond 3). As we move from single to triple bond, the magnitude of s character of the bond increases hence the bonds become shorter. Single bonds are longer than double bonds and double bonds are longer than triple bonds.

c) (bond 3) the triple bond is the shortest and strongest of all the bonds. The shorter a bond, the stronger it is.

the answer is option a.

a is the correct answer