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Free download in PDF Class 12 Chemistry Chapter 8 the d and f Block Elements Multiple Choice Questions (MCQs) with Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like NEET, AIIMS, JIPMER etc. These short solved questions or quizzes are provided by Gkseries./p>
(1)
Which of the following does not considered as transition element ?
[A]
Au
[B]
Hg
[C]
La
[D]
Pt
(2)
Which of the following does not relevant with transition elements ?
[A]
Melting points of transition elements are high
[B]
Some ions of transition elements possesses paramagetic properties
[C]
All transition elements dissolves in acid
[D]
Transition elements processes various oxidation state
Answer: All transition elements dissolves in acid
(3)
Which elements have low ionisation enthalpy as compare to their neighbour element in first transition element ?
[A]
Cr, Cu
[B]
Cr, Zn
[C]
Cr, Mn
[D]
Cu, Zu
(4)
Thermal stability of transition metal elements depends upon which of the following ?
[A]
Atomic radii
[B]
Magnitude of ionisation enthalpy
[C]
On electrode potential
[D]
Shielding effect
Answer: Magnitude of ionisation enthalpy
(5)
In which of the following compound of trantion metal ion has 4.90 BM magnetic momentum?
[A]
KMnO4
[B]
NiCl2
[C]
CoCl2
[D]
FeSO4
(6)
Which of the following sentence is not suitable for the capacity of transition metal to form complex compounds ?
[A]
Transition metal ions are small in size
[B]
Nuclear charge of trantion metal ion in comparatively more
[C]
Co-ordination covalent bond is not directional
[D]
Transition metal ions possesses different oxidation states
Answer: Co-ordination covalent bond is not directional
(7)
Which of the following rules to prepare alloys should be obey ?
[A]
Difference in atomic radii should be less than 15%
[B]
Valence electron configuration should not be equal
[C]
Atomic volume should not same
[D]
Crystal lattice structure are different
Answer: Difference in atomic radii should be less than 15%
(8)
What is the difference in atomic radii of two metallic elements to prepare alloys ?
[A]
15%
[B]
more than 15%
[C]
less than 15%
[D]
24.5 %
(9)
What is the difference of atomic radii of Au and Cu in 22 carate gold ?
[A]
15%
[B]
more than 15%
[C]
less than 15%
[D]
24.5%
(10)
Mn, Co, Cu metals are generally useful to prepare alloys because
[A]
the difference in their atomic volume is more than 15%
[B]
the difference in their atomic volume is less than 2%
[C]
the difference in their atomic volume is 15%
[D]
the difference in their atomic volume is 2%
Answer: the difference in their atomic volume is less than 2%
(11)
Which alloy is used in preparation of coins ?
[A]
Brass
[B]
Bronze
[C]
German-Silver
[D]
Nichrome
(12)
Which alloy is used in preparation of antic - piece ?
[A]
Nitinol
[B]
Bronze
[C]
Cupronickle
[D]
German-Silver
(13)
Which alloy possesses facinating property of memory ?
[A]
Brass
[B]
Nitinol
[C]
Nichrom
[D]
Cupronicle
(14)
Where potasium dicromate is used ?
[A]
In leather industry
[B]
In textile industry
[C]
As germiside
[D]
As bleaching agent in cotton cloths
Answer: In leather industry
(15)
What is atomic volume of Au and Cu in 22 carrate gold ornaments ?
[A]
134 pm 118 pm
[B]
133 pm 118 pm
[C]
134 pm 117 pm
[D]
135 pm 117 pm
(16)
Potassium permangnate is used as _____
[A]
As reducing agent
[B]
As corrosion inhibitors
[C]
As decolouring agent in textile industry
[D]
In preparation of azo compound
Answer: As decolouring agent in textile industry
(17)
Which of following is used in dry cell ?
[A]
KMnO4
[B]
MnO2
[C]
K2 Cr2 O7
[D]
K2MnO2
(18)
Which of alloy is used to fill dental cavities ?
[A]
Sodium amalgam
[B]
Zinc chloride
[C]
Mercury
[D]
Mercury Amalgam
(19)
Which of following is used as gernlicide
[A]
K2Cr2O7
[B]
KMnO4
[C]
FeSO4
[D]
K2MnO4
(20)
Which of following elements are include in Lanthanoide series ?
[A]
La to Lu
[B]
Ce to Lu
[C]
La to yb
[D]
Ce to yb
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