Question

which of the following is responsible for the relatively high boiling point of water?
A. Hydrogen bonding
B. Ionic bonding
C. Metallic bonding
D. Non polar bonding
E. Polar covalent bonding

Answer 1

Hint: Water in general has a boiling point of ${100^o}C$ which is quite high compared to other liquids. The boiling point of any substance depends on various factors that is type of bond and molecular weight of the substance. If the intermolecular attraction between molecules is more than the boiling point increases.

Complete step by step answer:
Water consists of two hydrogen molecules and one oxygen molecule. It has a molecular formula of ${H_2}O$ . The two hydrogen molecules are bonded to the oxygen atom. It is a polar molecule due to the presence of a more electronegative oxygen atom which is bonded to a less electronegative hydrogen atom.
The hydrogen and oxygen are bonded together using the hydrogen bond and not a normal covalent bond. This bond is stronger compared to covalent bonds. This bond is formed due to a strong affinity of hydrogen with oxygen. The hydrogen bond is a result of dipole dipole interaction between hydrogen and a relatively higher electronegative atom. There is a hydrogen bond between two water molecules which increases the intermolecular attraction between two water molecules. Boiling in a sense attempts to separate two water molecules. This means that when water is boiling the water molecules are required to separate from each other. But since water molecules cannot do this at a lower temperature, they have a higher boiling point in order to separate.
Ionic bonding is formed between metals and nonmetals where electrons are completely transferred from the metal to the non metal.
Metallic bonding is found in metals and is comparatively stronger than most bonds.
Non polar bonding is found in compounds containing the same types of atoms.
Polar bonding is found in compounds that do not contain the same atoms.

So, the correct answer is Option A .

Note: All molecules in liquids at boiling point separate from each other and begin to boil. There is a hydrogen bond between the hydrogen of one water molecule and the oxygen of another molecule. The presence of hydrogen bonds increases the intermolecular attraction between the molecules.