GENERAL KNOWLEDGE

Detailed explanation-1: -The oxygen has two lone pairs which can be donated to form two other hydrogen bonds, so a water molecule can form four hydrogen bonds. So, the maximum number of hydrogen bonds formed by a water molecule are4. Therefore, option (D) 4 is correct.

Detailed explanation-2: -Each water molecule can form two hydrogen bonds involving their hydrogen atoms plus two further hydrogen bonds utilizing the hydrogen atoms attached to neighboring water molecules.

Detailed explanation-3: -There can be maximum of 4 hydrogen bonds in which a water molecule can participate.

Detailed explanation-4: -A water molecule has three atoms: two hydrogen (H) atoms and one oxygen (O) atom. That’s why water is sometimes referred to as H2O. A single drop of water contains billions of water molecules.

Detailed explanation-5: -Water is an ideal example of hydrogen bonding. Notice that each water molecule can potentially form four hydrogen bonds with surrounding water molecules: two with the hydrogen atoms and two with the with the oxygen atoms.