Question

Which of the following set of elements do not
belong to the same group ?
(A) F, Cl, Br
(B) Na, K, Rb
(C) P, S, CI
(D) C, Si, Ge

Answer 1

The set of elements that do not belong to the same group is C) P, S, and Cl.

• F, Cl, Br are halogens belong to the same group which is group 7.
• Na, K, Rb are the alkali metals and belong to group 1.
• C, Si, Ge belong to group 14.
• Phosphorus belongs to group 15, Sulphur belongs to group 16 and Chlorine also belongs to Group 17.
• Hence, option C is correct option as Phosphorus, Germanium and Chlorine belong to different groups.