Solved UPSC CDS/OTA Question
A solved UPSC CDS/OTA PYQ - decoded step-by-step.
Solve it the standard way once - then learn the shortcut.
Q · Classification of Elements Medium · 45s
Which period contains 32 elements?
TopicClassification of Elements
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained - no skipped algebra.
Period 6 includes 14 lanthanides, totaling 32 elements.
Final Answer: Option C - Sixth