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Test: d & f-Block Elements - NEET MCQ

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25 Questions MCQ Test Chemistry Class 12 - Test: d & f-Block Elements

Test: d & f-Block Elements for NEET 2024 is part of Chemistry Class 12 preparation. The Test: d & f-Block Elements questions and answers have been prepared according to the NEET exam syllabus.The Test: d & f-Block Elements MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: d & f-Block Elements below.

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Test: d & f-Block Elements - Question 1

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Which among the following is not considered as a part of transition elements?

A.
Zinc
B.
Copper
C.
Zirconium
D.
Silver

Detailed Solution for Test: d & f-Block Elements - Question 1

A transition metal is one that forms one or more stable ions which have incompletely filled d orbitals. On the basis of this definition, scandium and zinc do not count as transition metals - even though they are members of the d block.

Test: d & f-Block Elements - Question 2

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Which among the following transition metal has lowest melting point?

A.
Titanium
B.
Cobalt
C.
Zinc
D.
Scandium

Detailed Solution for Test: d & f-Block Elements - Question 2

Zn has lowest melting point because it doesnot have any unpaired electrons.

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Test: d & f-Block Elements - Question 3

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Transition metals with highest melting point is

A.
Cr
B.
W
C.
Hg
D.
Sc

Detailed Solution for Test: d & f-Block Elements - Question 3

W belongs to 5d series and also it have lot of unpaired electrons thus it forms strong metallic bonding.

Test: d & f-Block Elements - Question 4

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Transition metals with lowest melting point is

A.
Hg
B.
Cr
C.
Cd
D.
Zn

Detailed Solution for Test: d & f-Block Elements - Question 4

- Mercury (Hg) is the transition metal with the lowest melting point.
- It is the only metal that is liquid at room temperature, with a melting point of -38.83°C.
- The low melting point is due to weak metallic bonding in mercury's lattice structure.
- Mercury's electrons are more tightly bound to the nucleus, reducing the overlap of electron clouds that contribute to metallic bonding.
- This results in weaker forces holding the atoms together, leading to a low melting point.

Test: d & f-Block Elements - Question 5

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Which is the most stable oxidation state of iron?

A.
+2
B.
+3
C.
0
D.
+1

Detailed Solution for Test: d & f-Block Elements - Question 5

Fe has d⁵ configuration in +3 oxidation state.

Test: d & f-Block Elements - Question 6

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Electronic configuration of Cu³⁺ is

A.
[Ar]3d⁸
B.
[Ar]3d²
C.
[Ar]3d¹
D.
[Ar]3d⁰

Detailed Solution for Test: d & f-Block Elements - Question 6

Cu has atomic number 29.

Test: d & f-Block Elements - Question 7

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Maximum magnetic moment is shown by

A.
d⁶
B.
d⁸
C.
d⁵
D.
d⁷

Detailed Solution for Test: d & f-Block Elements - Question 7

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

Test: d & f-Block Elements - Question 8

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Maximum oxidation state is shown by

A.
Os
B.
Co
C.
Cr
D.
Mn

Detailed Solution for Test: d & f-Block Elements - Question 8

Os shows maximum oxidation state of +8.

Test: d & f-Block Elements - Question 9

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Which one of the following compound is deliquescent?

A.
HgCl₂
B.
ZnCl₂
C.
Hg₂Cl₂
D.
CdCl₂

Detailed Solution for Test: d & f-Block Elements - Question 9

ZnCl₂is deliquescent.

Test: d & f-Block Elements - Question 10

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Which of the following ion has smallest radii?

A.
V²⁺
B.
Ni²⁺
C.
Mn²⁺
D.
Ti²⁺

Detailed Solution for Test: d & f-Block Elements - Question 10

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.

Test: d & f-Block Elements - Question 11

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Which of the following pairs of ions have same paramagnetic moment?

A.
Cu²⁺, Ti³⁺
B.
Ti³⁺, Ni²⁺
C.
Ti⁴⁺, Cu²⁺
D.
Mn²⁺, Cu²⁺

Detailed Solution for Test: d & f-Block Elements - Question 11

Cu²⁺, Ti³⁺will have same unpaired electrons and hence same paramagnetic moment.

*Multiple options can be correct

Test: d & f-Block Elements - Question 12

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Which of the following metals have only one oxidation state?

A.
Co
B.
Sc
C.
Fe
D.
Al

Detailed Solution for Test: d & f-Block Elements - Question 12

Sc,Al has only one oxidation state i.e. +3.

Co,Fe has various oxidation states; most common are +2 and +3.

Test: d & f-Block Elements - Question 13

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Mohr’s salt is a

A.
Acidic salt
B.
Double salt
C.
Basic Acidic salt
D.
Normal salt

Detailed Solution for Test: d & f-Block Elements - Question 13

Mohr salt is an example of double salt. Mohr Salt is

FeSO₄. (NH₄)₂ SO₄.6H₂O

Test: d & f-Block Elements - Question 14

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Red hot steel rods on suddenly immersing in water become

A.
Fibrous
B.
Hard and brittle
C.
Soft and malleable
D.
Tough and ductile

Detailed Solution for Test: d & f-Block Elements - Question 14

Red hot steel rods on suddenly immersing in water become hard and brittle.

Test: d & f-Block Elements - Question 15

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Which of the following methods is based on distribution law?

A.
Parke’s process
B.
Poling process
C.
Mond’s process
D.
Cupellation process

Detailed Solution for Test: d & f-Block Elements - Question 15

Parkes process is a process for removing silver from Pb. It is an example of Liquid liquid extractions

Test: d & f-Block Elements - Question 16

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Which is called chromic acid?

A.
Cr₂O₃
B.
Cr₃O₄
C.
CrO
D.
H₂CrO₄

Detailed Solution for Test: d & f-Block Elements - Question 16

Chromic Acid is a naturally occurring oxide with a formula H₂CrO₄.

Test: d & f-Block Elements - Question 17

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Which one of the following combines with Fe²⁺ ion to form a brown complex?

A.
N₂O
B.
N₂O₃
C.
N₂O₅
D.
NO

Detailed Solution for Test: d & f-Block Elements - Question 17

[Fe(H₂O)₅NO]²⁺is brown color complex.

Test: d & f-Block Elements - Question 18

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Lucas reagent is

A.
ZnCl₂ + HCl
B.
MnO₂ + H₂O
C.
H₂SO₄+ HCl
D.
NO + H₂O

Detailed Solution for Test: d & f-Block Elements - Question 18

Lucas Test is done to distinguish primary secondary and tertiary alcohols. Lucas reagent is ZnCl₂ + HCl

Test: d & f-Block Elements - Question 19

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Vitamin B₁₂ contains?

A.
Zn²⁺
B.
Co³⁺
C.
Fe²⁺
D.
Ca²⁺

Detailed Solution for Test: d & f-Block Elements - Question 19

Vitamin B₁₂ contains Co³⁺.

Test: d & f-Block Elements - Question 20

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Which is least soluble in water?

A.
Ag₂S
B.
AgBr
C.
AgCl
D.
AgI

Detailed Solution for Test: d & f-Block Elements - Question 20

Ag₂S is least soluble in water.

Test: d & f-Block Elements - Question 21

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A reduction in the atomic size with increase in atomic number is characteristic of the elements of

A.
high atomic masses
B.
d – block
C.
f – block
D.
radioactive series

Detailed Solution for Test: d & f-Block Elements - Question 21

In f block elements with increase in atomic number atomic radii decreases smoothly.

Test: d & f-Block Elements - Question 22

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Nitrous oxide is evolved when Zn is treated with

A.
Conc. Nitric acid
B.
Nitrous acid
C.
Dilute nitric acid
D.
None of these

Detailed Solution for Test: d & f-Block Elements - Question 22

4Zn + 10HNO₃ → 4Zn(NO₃)₂ + N₂O + 5H₂O

Test: d & f-Block Elements - Question 23

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Ferrous sulphate on heating gives

A.
SO₂ and SO₃
B.
SO₂ and O₂
C.
SO₂
D.
SO₃

Detailed Solution for Test: d & f-Block Elements - Question 23

FeSO₄on heating gives SO₂ and SO₃

Test: d & f-Block Elements - Question 24

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In the reaction, SnCl₂ + HgCl₂→ A + SnCl₄

A.
HgCl
B.
HgCl₃
C.
HgCl₂
D.
Hg

Detailed Solution for Test: d & f-Block Elements - Question 24

SnCl₂ + HgCl₂→ Hg + SnCl₄

Test: d & f-Block Elements - Question 25

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Ag⁺ ion is isoelectronic with

A.
Zn²⁺
B.
Cd²⁺
C.
Pd²⁺
D.
Cu²⁺

Detailed Solution for Test: d & f-Block Elements - Question 25

Ag⁺ is isoelectronic with Cd²⁺

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