MCQ: where does hydrogen come from generally?
(A). natural gas
(B). sodium carbonate
(C). calcium chloride
(D). hydrogen chloride
Question’s Answer: natural gas
Natural gas generally called methane (CH4) is formed from composition of carbon and hydrogen. While on decomposition it release hydrogen as its product. While other option does not contain hydrogen as their primary constituent or very expensive as a source of hydrogen.
| 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 |
More important MCQs on Hydrogen
- Where does hydrogen come from generally?
- which of the following biomolecules contain carbon hydrogen and oxygen?
- How many hydrogen bonds in water?