MCQ: which of the following biomolecules contain carbon hydrogen and oxygen?
(A).benzene
(B).carbon dioxide
(C).carbohydrates
(D).pentane
Question’s Answer: carbohydrates
Carbohydrates are group of organic compound that contain carbon hydrogen and oxygen in 1:2:1 ratio. These compounds are used as a source of energy while performing function such as glucose fructose etc.
| Characteristics | Details |
| Symbol | H |
| Atomic mass | 1.008 u |
| Atomic number | 1 |
| Atomic mass | 1.008 u |
| Electronic configuration | 1s<sup>1</sup> |
| Period | 1 |
| Block | S |
| Electronegativity | 2.20 (Pauling scale) |
| Density | 0.08988 g/L at STP |
| State of matter at room temperature | Gas |
| Oxidation states | +1, -1 |
| Ionization energy | 1312.0 kJ/mol |
| Isotopes | Hydrogen has three isotopes;
1. protium (1H) 2. deuterium (2H) 3. tritium (3H). |
| Melting point | -259.14°C |
| Boiling point | -252.87°C |
