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← Bihar Board Class 12 PYQ
The d- and f-Block Elements
Bihar Board Class 12 · Chemistry · 31 past questions
Topic
Magnetic properties
2
Oxidation states
1
Colour and complex formation
0
Electronic configuration
0
Important compounds and biological roles
0
Introduction and general characteristics of transition elements
0
Lanthanoids and actinoids
0
Level
Easy
2
Moderate
1
Year
2026
2
2025
6
2024
3
2023
4
2022
6
2021
2
2019
1
2018
2
2017
2
2016
2
2015
2
3 of 31 ·
show all
Q9
2024 Set D
Which of the following has maximum number of unpaired electrons ?
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Q10
2024 Set D
The maximum oxidation state of chromium is
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Q11
2024 Set D
The number of unpaired electrons in $Cu^{2+}$ ion ( Z = 29 ) is
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