Civil Services TNPSC Group 1 (New Syllabus) Mock Test 2025 General Science Chemistry Classification of Elements and Periodicity in Properties
Consider the following metals.
1. Sodium
2. Calcium
3. Potassium
Arrange the metals given above in the increasing order of their reactivity.
1
1-2-3
2
3-1-2
3
2-1-3
4
2-3-1