Question

4. An element X is forming acidic oxide. Its most
probable position in the modern periodic
table is:
(a) Group 1 and Period 3
(b) Group 16 and Period 3
(c) Group 17 and Period 3
(d) Group 2 and Period 3
[CBSE 2020​

Answer 1

(c) Group 17 and Period 3

Explanation:

•Acidic nature of the oxides of elements increases across a period.

•This means that the element at the rightmost position in a period will have the most acidic oxide.

• Hence, most probably the oxide will be of Group 17 element and period 3.