Question

Odd one among the following which does not belong to the set is

• A. Graphite
• B. Gold
• C. Germanium
• D. Ice

Answer 1

The correct option is D

Ice

The explanation for the correct option:

(d) Ice:

1. Ice is a chemical substance or compound.
2. Ice molecules, like their liquid counterparts, are made up of the same 2 to 1 ratio of hydrogen and oxygen atoms as the ${\mathrm{H}}_2\mathrm{O}$ molecule.

The explanation for incorrect options:

(a) graphite:

1. Graphite is a chemical element.
2. Graphite is really an allotrope of the element carbon.
3. As a result, when you see the structure of only one element, such as carbon, it indicates that it contains only one sort of atom.

(b) gold:

1. The chemical element gold has the symbol $\mathrm{Au}$.
2. For thousands of years, gold has been used to create decorative artefacts and jewellery.

(c) germanium:

1. Germanium ($\mathrm{Ge}$) is a chemical element.
2. It possesses a diamond-like crystalline structure and chemical and physical characteristics comparable to silicon.

Hence option (d) is the correct option, ice is a compound while others are elements.