Question

Which Of The Following Has The Highest Melting Point?

(a) NaCl (b) CCl4

(c) CH4 (d) C2H6

Answer 1

Answer:

Methane

Explanation:

Methane is gas that is found in small quantities in Earth's atmosphere. Methane is the simplest hydrocarbon, consisting of one carbon atom and four hydrogen atoms. Methane is a powerful greenhouse gas. Methane is flammable, and is used as a fuel worldwide. It is a principal component of natural gas.

Answer 2

Option (c)  $CH_4$ has high melting point.

Explanation:

• Methane is a powerful greenhouse gas.
• The hydrogen bond is the most strong intermolecular force influencing neutral (uncharged) molecules.
• Methane has five atoms, and the extra nuclei may give it a better chance of forming induced dipoles as other molecules approach.
• Polarizability refers to how easily the electrons of a molecule, atom, or ion can be shifted by a surrounding charge, hence we can deduce that methane is more polarizable than neon.
• Let's look at the differences between methane and dihydrogen. We could use the same argument we used to compare methane and water here.
• The bond dipole of the $C-H$ bond is greater than that of the$H-H$ bond. As a result, the boiling point of methane is greater.

• The boiling point of methane is$\;-162\;^\circ C\;(-259.6\;^\circ F)$ and the melting point is $-182.5\;^\circ C\;(-296.5\;^\circ F).$
• Methane is a major source of hydrogen as well as a number of organic compounds. At high temperatures, methane combines with steam to produce carbon monoxide and hydrogen, the latter of which is used to make fertilisers and explosives.
• Methanol, chloroform, carbon tetrachloride, and nitromethane are some of the other useful compounds generated from methane.
• Carbon black is produced by incomplete combustion of methane, and it is commonly utilised as a reinforcing ingredient in rubber used in automotive tyres.