The d- and f- Block Elements - Online Test

Q1. Electronic configuration of Mn2+ is
Answer : Option D
Explaination / Solution:

Mn has atomic number 25.

Q2. Maximum magnetic moment is shown by
Answer : Option D
Explaination / Solution:

Magnetic moment is maximum for the element having maximum unpaired electrons.

Q3. Maximum oxidation state is shown by
Answer : Option D
Explaination / Solution:

Os shows maximum oxidation state of +8.

Q4. Zinc carbonate is precipitated from zinc sulphate solution by the addition of
Answer : Option C
Explaination / Solution:


Q5. Which of the following sublimes on heating?
Answer : Option A
Explaination / Solution:

HgCl2 sublimes on heating.
Q6. Which one of the following compound is deliquescent?
Answer : Option A
Explaination / Solution:

ZnCl2 is deliquescent.
Q7. Which of the following ion has smallest radii?
Answer : Option A
Explaination / Solution:

In period when we move from left to right in a period atomic radii 1st decreases till nickel then starts increasing so Ni2+ has smallest radii.
Q8. Which of the following pairs of ions have same paramagnetic moment?
Answer : Option C
Explaination / Solution:

Cu2+, Ti3+will have same unpaired electrons and hence same paramagnetic moment.
Q9. Which of the following metals have only one oxidation state?
Answer : Option B
Explaination / Solution:

Al is not a d block element hence it shows only one oxidation state. While rest all others are d block elements which shows variable oxidation state.

Q10. Mohr’s salt is a
Answer : Option D
Explaination / Solution:

Mohr salt is an example of double salt. Mohr Salt is FeSO4. (NH4)2SO4.6H2O.