If you are preparing for CBSE Class 12 Board Exam Term 1 which will be an objective type questions paper, then you need to practice multiple choice questions of Class 12 Chemistry Chapterwise. In this article of AKVTutorials, you will get d and f Block Elements CBSE Class 12 Chemistry MCQ Questions with Answer Keys.
d and f Block Elements MCQ Questions for Class 12 Question No 11:
Transition metals show variable oxidation states because of :
Option A : participation of nd electrons along with np electron
Option B : participation of (n-1)d and ns electrons
Option C : participation of (n-1)d and np electrons
Option D : None of these are correct
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Option B : participation of (n-1)d and ns electrons
d and f Block Elements MCQ Questions for Class 12 Question No 12:
Which does not belong to first transition series
Option A : Fe
Option B : V
Option C : Ag
Option D : Cu
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Option C : Ag
d and f Block Elements MCQ Questions for Class 12 Question No 13:
When SO2 is passed through acidified K2Cr2O7
Option A : the solution becomes blue
Option B : the solution decolourises
Option C : SO2 is reduced
Option D : green Cr2(SO4)3 is formed
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Option D : green Cr2(SO4)3 is formed
d and f Block Elements MCQ Questions for Class 12 Question No 14:
The spin-spin moment in units of Bohr magneton (μB) of Ni2+ ion in aqueous solution would be:
Option A : 2.84
Option B : 4.90
Option C : Zero
Option D : 1.73
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Option A : 2.84
d and f Block Elements MCQ Questions for Class 12 Question No 15:
If KMnO4 is reduced by oxalic acid in the acidic medium then oxidation number of Mn changes from :
Option A : +4 to +2
Option B : +6 to +4
Option C : +7 to +2
Option D : +7 to +4
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Option C : +7 to +2
d and f Block Elements MCQ Questions for Class 12 Question No 16:
Which one ion is colorless in aqueous solution ?
Option A : Mn2+
Option B : Fe2+
Option C : Zn2+
Option D : Cr2+
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Option C : Zn2+
d and f Block Elements MCQ Questions for Class 12 Question No 17:
The element which shows +8 oxidation state is :
Option A : Pt
Option B : Mn
Option C : Os
Option D : Cu
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Option C : Os
d and f Block Elements MCQ Questions for Class 12 Question No 18:
The salts of transition metals are colored because
Option A : d-orbitals are completely filled
Option B : they absorb ultraviolet light
Option C : d-d transition takes place
Option D : They absorb energy from electromagnetic radiation
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Option C : d-d transition takes place
d and f Block Elements MCQ Questions for Class 12 Question No 19:
The change in oxidation number during passing SO2 gas to aqueous solution of K2Cr2O7 is from :
Option A : +3 to +1
Option B : +6 to +3
Option C : +3 to +6
Option D : +6 to +4
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Option C : +6 to +3
d and f Block Elements MCQ Questions for Class 12 Question No 20:
Which one metal has the highest density among following ?
Option A : Pd
Option B : Hg
Option C : Os
Option D : Pt
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Option C : Os