Question

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

NCERT Class X
Science - Exemplar Problems

Chapter_Periodic Classification of Elements

Answer 1

Option (a) is correct.

Answer 2

Answer: Option (a) is the correct answer.

Explanation:

Oxygen present in the air reacts with non-metals such as nitrogen, sulfur etc as a result, non-metals tend to form oxides which are acidic in nature.

For example, oxides such as nitrogen oxide and sulfur oxide are responsible for acid rain. When they get mixed into the rain water then rain water becomes acidic solution.

Also, oxides of non-metals form oxyacids which results in the formation of hydronium ions in an aqueous solution.

Thus, we can conclude that out of the given options an element with atomic number 7 is nitrogen which is a non-metals and hence it forms acidic oxides.