MCQ: How many hydrogen bonds in water?
(A).2
(B).3
(C).4
(D).none of these
Question’s Answer: 4
Four hydrogen bonds are present in water. out of four two hydrogen bonds are due to two hydrogen atom while other two are formed due to presence of lone pair on oxygen.
| 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 |