Question

An element which is an essential constituent of all organic compounds belongs to

• A. Group 1
• B. Group 14
• C. Group 15
• D. Group 16

Answer 1

The correct option is B

Group 14

An explanation for the correct option:

1. Based on the fact essential constituent of all organic compounds is Carbon $\left(C\right)$.
2. Carbon has the atomic number of 6, which means that the electronic configuration of carbon can be written as ${}_{6}C=2,4$
3. It can be seen that carbon has four electrons in its outermost shell which means that Carbon belongs to group 14.

An explanation for the incorrect option:

1. Group 1 has Hydrogen $\left(H\right)$, Lithium $\left(Li\right)$, Sodium $\left(Na\right)$, Potassium $\left(K\right)$, Rubidium $\left(Rb\right)$, Cesium $\left(Cs\right)$ and Francium $\left(Fr\right)$ so option (a) is incorrect.
2. Group 15 has Nitrogen $\left(N\right)$, Phosphorus $\left(P\right)$, Arsenic $\left(As\right)$, Antimony $\left(Sb\right)$, and Bismuth $\left(Bi\right)$ so option (c) is incorrect.
3. Group 16 has Oxygen $\left(O\right)$, Sulphur $\left(S\right)$, Selenium $\left(Se\right)$, Tellurium $\left(Te\right)$, and Polonium $\left(Po\right)$ so option (c) is incorrect.

The correct option would be (B) and option (A), (C) and (D) are incorrect.