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The d-block of the periodic table holds the groups:
A3 to 12
B1 and 2
C13 to 18
D4 and 5
Answer & Solution
Correct answer: A. 3 to 12
1. The d-block sits between the s-block and the p-block.
2. Its d orbitals fill progressively across each long period.
3. It runs from group 3 through group 12.
_Source: NCERT Class 12 Chemistry Part I, Chapter 8, The d- and f-Block Elements._
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