d- and f- Block Elements  MCQs

MCQs of d- and f- Block Elements

Showing 21 to 30 out of 158 Questions
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21.
With which metal transition metals can not form alloys ?
(a) Ca
(b) Ba
(c) Sr
(d) Au
Answer:

Option (d)

22.
Which ion of the following contains minimum magnetic moment ?
(a) Ti2+
(b) Cu2+
(c) Ni2+
(d) V2+
Answer:

Option (b)

23.
Which ion contains maximum electron pair in 3d-orbital ?
(a) Fe2+
(b) Cu2+
(c) Mn2+
(d) Co2+
Answer:

Option (b)

24.
General hydrides of Lanthanide series are of which type ?
(a) M(OH)2
(b) M(OH)3
(c) M(OH)4
(d) MOH
Answer:

Option (b)

25.
Which alloy is used in pandulum of clock ?
(a) Cupronickel (Invar)
(b) Nichrome
(c) Nitinol
(d) Germansilver
Answer:

Option (a)

26.
Name the series of the elements whose 4d orbital is incompletely filled by electrons.
(a) First
(b) Second
(c) Third
(d) Fourth
Answer:

Option (b)

27.
Which transition element from the following reacts very slow as reducing agent ?
(a) Fe
(b) Cu
(c) Pt
(d) Ag
Answer:

Option (c)

28.
What is the colourof [Co(NH3)6]3+ ?
(a) Red
(b) Green
(c) Yellowis orange
(d) Light violet
Answer:

Option (c)

29.
Which inner transition compounds are used in the following ?
(a) To make equipments
(b) To make machinery
(c) To make vehicles
(d) Given all
Answer:

Option (d)

30.
The difference between two atomic radii should not be more than_____to from an alloy.
(a) 15%
(b) 10%
(c) 5%
(d) 25%
Answer:

Option (a)

Showing 21 to 30 out of 158 Questions
1 2 3 4 5 6