Question

Which of the following process is shown by iodine and naphthalene?

• A. Melting
• B. Sublimation
• C. Liquefaction
• D. Vapourisation

Answer 1

The correct option is B

Sublimation

The explanation for the correct answer

(b)Sublimation

• The process in which a solid directly converts into its gaseous state without converting into the liquid state on heating is called sublimation.
• The gaseous state of the substance obtained during sublimation is called sublime.
• Iodine, naphthalene and ammonium chloride are examples of sublimation.

The explanation for the incorrect answer

(a) Melting

Melting is the process in which solid changes into liquid by absorbing heat

(c) Liquefaction

• Liquefaction is the process in which gas changes into liquid at a constant temperature.

(d) Vapourisation

• Vapourisation is the process in which liquid changes into a gas by absorbing heat.

Therefore, the correct option is (b).