Question 31

Given below are two statements:
Statement - I: Along the period, the chemical reactivity of the element gradually increases from group 1 to group 18.
Statement - II: The nature of oxides formed by group 1 element is basic while that of group 17 elements is acidic.
In the light of the above statements, choose the most appropriate from the options given below:

Statement I: Along the period, chemical reactivity does NOT gradually increase from group 1 to group 18. Reactivity first decreases (metals less reactive), then increases for non-metals, and noble gases (group 18) are least reactive. So Statement I is FALSE.

Statement II: Group 1 elements form basic oxides (like Na$$_2$$O, K$$_2$$O) and Group 17 elements form acidic oxides (like Cl$$_2$$O$$_7$$). This is TRUE.

The answer is Option (3): Statement I is false but Statement II is true.

Create a FREE account and get:

  • Free JEE Mains Previous Papers PDF
  • Take JEE Mains paper tests