GEOLOGY

Detailed explanation-1: -The longest bond is considered to be a carbon-carbon bond, present in diamond. Its length is 154 pm. It is the longest due to the three-dimensional structure of diamond, and the carbon atoms bonded through covalent bonds.

Detailed explanation-2: -The molecule with the longest single bond is a) HI. Due to the size and electronegativity of HI, we classify it to have the longest single bond. The I atom is the largest atom between Cl, F, H, and Br.

Detailed explanation-3: -Single bonds tend to be longest and triple bonds shortest [i.e. C-C (154 pm), C=C (134 pm), C≡C (120 pm)]. The atoms must get closer to share more electrons.

Detailed explanation-4: -Bond Length Generally, the length of the bond between two atoms is approximately the sum of the covalent radii of the two atoms. Bond length is reported in picometers. Therefore, bond length increases in the following order: triple bond < double bond < single bond.

Detailed explanation-5: -Hence, the two biggest atoms are Te and I, meaning Te-I will form the longest single bond.