Question

Question 21
Which of the following elements will form an acidic oxide?

(a) An element with atomic number 7
(b) An element with atomic number 3
(c) An element with atomic number 12
(d) An element with atomic number 19

Answer 1

Option (a) is correct.

Nonmetals form acidic oxides and metals form basic oxides. In the given case, all the elements except the one with atomic number 7 are metals so they will form the basic oxide. Element with atomic number 7 is a nonmetal hence it will form an acidic oxide.