Chapter 6, Problem 4STP

Interpretation Introduction

Interpretation:

The group to which element X belongs needs to be determined.

Concept introduction:

In the periodic table, two groups, Group I and II are known as s-block elements. Group I elements are known as alkali metals and group II elements are known as alkaline earth metals.

Answer to Problem 4STP

A is correct, X belongs to group 1.

Explanation of Solution

Given that the element X belongs to s block and is a soft solid and readily reacts with oxygen. As X is an s-block element, it must be from group I or II. But in the options only group 1 is present. So, A is the correct answers.

Conclusion

Group 4, group 18 and 17 not belongs to s-block. So, B, C and D are incorrect options.