d and f Block Elements MCQs | Question – Paper 5

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Topic: d and f Block Elements, Test No.: 05, Total MCQs: 10

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Question 1
The spin only magnetic moment of Fe2+ ion (in BM) is approximately
A
4
B
7
C
5
D
6
Question 2
When AgNO3 solution is added in excess to 1 M solution of CoCl3, XNH3 one mole of AgCl is formed. What is the value of X
A
1
B
2
C
3
D
4
Question 3
When I– is oxidized by MnO4– in alkaline medium, I– converts into
A
IO3–
B
I2
C
IO4–
D
IO–
Question 4
Which do not decolourise KMnO4 aqueous solution?
A
C2O4–
B
HSO3–
C
CO32–
D
SO32–
Question 5
Which is the chief ore of copper?
A
Galena
B
Copper pyrites
C
Sphalerite
D
Siderite
Question 6
Which of the following is a Ferrous alloy
A
German silver
B
Gunmetal
C
Nichrome
D
Devarda’s alloy
Question 7
Which of the following pairs of elements cannot form an alloy?
A
Fe, C
B
Fe, Hg
C
Zn, Cu
D
Hg, Na
Question 8
Which of the following types of metals form the most efficient catalysts?
A
alkali metals
B
alkaline earth metals
C
transition metals
D
all the above 
Question 9
What is the correct order of spin only magnetic moment (in BM) of Mn2+, Cr2+ and V2+?
A
Mn2+ > V2+ > Cr2+
B
V2+ > Cr2+ > Mn2+
C
Mn2+ > Cr2+ > V2+
D
Cr2+ > V2+ > Mn2+
Question 10
What would happen when a solution of potassium chromate is treated with an excess of dilute nitric acid?
A
Cr3+ and Cr2 O72–
B
Cr2 O72– and H2O are formed
C
Cr2 O42– is reduced to +7 state of Cr
D
Cr2 O42– is reduced to +3 state of Cr
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