In an electrolytic cell, the cathode is the electrode where: MCQ with Answer and Explanation

Explanation:
Vitamins are classified into fat-soluble (A, D, E, K) and water-soluble (B-complex and C) groups. Vitamin C (ascorbic acid) is water-soluble, meaning it dissolves in water and is not stored in the body to a significant extent, requiring regular dietary intake. Vitamins A, D, and K are fat-soluble.

Explanation:
Hydrogen has a very high calorific value of about 141.9 kJ/g (higher heating value) or ~150 kJ/g approximate. This makes it an excellent fuel, though storage is challenging. Methane ~55 kJ/g, petrol ~47 kJ/g. Hydrogen fuel cells use it efficiently.

Explanation:
Chlorine forms hypochlorous acid (HOCl) which is a strong oxidizing agent that destroys bacteria and viruses. It does not remove particles (filtration does) or dissolved salts.