d- and f- Block Elements  MCQs

MCQs of d- and f- Block Elements

Showing 11 to 20 out of 158 Questions
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11.
State the number of groups in d-block.
(a) 8
(b) 10
(c) 12
(d) 14
Answer:

Option (b)

12.
Which block elements are called innertransition elements ?
(a) s-block
(b) p-block
(c) d-block
(d) f-block
Answer:

Option (d)

13.
What is main quantum number of extreme outermost orbit of first transition elements ?
(a) 3
(b) 4
(c) 5
(d) 6
Answer:

Option (b)

14.
What is the change in ionic radii while going from Sc to Cu in m+2 ions ?
(a) Decreases
(b) Increases
(c) Remain same
(d) None of the above
Answer:

Option (a)

15.
Which block of transition series contain maximum oxidation state ?
(a) Primary
(b) Medium part
(c) Last part
(d) None of the above
Answer:

Option (b)

16.
State stable oxidation state of Fe.
(a) +2
(b) +3
(c) +4
(d) +5
Answer:

Option (b)

17.
In which formation rules of Hume and Rothery are connected ?
(a) Alloy of useful properties
(b) Formation of satable compounds
(c) Foemation interstitial compounds
(d) To decide atomic number.
Answer:

Option (a)

18.
What is the oxidation state of Sc ?
(a) +1
(b) +2
(c) +3
(d) +4
Answer:

Option (c)

19.
State percentage of carbon in soft iron.
(a) Less than 0.2 %
(b) 0.3 % to 0.6 %
(c) 0.2 % to 0.3 %
(d) More than 0.6 %
Answer:

Option (c)

20.
What is the % of Cr in stain less steel ?
(a) 8 %
(b) 18 %
(c) 20 %
(d) 32 %
Answer:

Option (c)

Showing 11 to 20 out of 158 Questions
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