5.Which among the following element is an essential constituent of acids? [A] Nitrogen [B] Hydrogen [C] Helium [D] Oxygen Show Answer
Detailed Solution. An acid is a molecule or ion capable of donating a hydron (proton or hydrogen ion H+), or, alternatively, capable of forming a covalent bond with an electron pair (a Lewis acid). The first category of acids is the proton donors or Bronsted acids, which have hydrogen as an essential constituent.
