The d- and f- Block Elements Test

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The d- and f- Block Elements Test - 64

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following ion has magnetic moment 3.87 BM?

A
$Co^{2+}$

B
$Mn^{3+}$

C
$Cu^{+}$

D
$Ni^{2+}$
Question 2
1 / -0

The correct order of spin -only magnetic moments among the following is :
(Atomic number : $Mn =25, Co + 27 , Ni = 28, Zn = 30)$

A
$[ZnCl_4]^{2-} > [NiCl_4]^{2-} > [CoCl_4]^{2-} > [MnCl_4]^{2-}$

B
$[CoCl_4]^{2-} > [MnCl_4]^{2- } > [NiCl_4]^{2-} > [ZnCl_4]^{2-}$

C
$[MnCl_{ 4 }]^{ 2- }>[CoCl_{ 4 }]^{ 2- }>[NiCl_{ 4 }]^{ 2- }>[ZnCl_{ 4 }]^{ 2- }$

D
$[NiCl_{ 4 }]^{ 2- }>[CoCl_{ 4 }]^{ 2- }>[MnCl_{ 4 }]^{ 2- }>[ZnCl_{ 4 }]^{ 2- }$

Solution
Question 3
1 / -0

The effect of lanthanoid contration in the lanthanid series of elements by and large means:

A
decrease in atomic radii and increases in ionic radii

B
decrease in both atomic and ionic radii

C
increase in both atomic and ionic radii

D
increases in atomic radii and decrease in ionic radii
Question 4
1 / -0

A transition metal cation M $^{2+}$ has a magnetic moment $\sqrt35$ . what is the atomic number of the metal?

A
$24$

B
$25$

C
$26$

D
$27$

Solution
Question 5
1 / -0

Orbital angular momentum of $e^-$ (last filled ) in Cr is

A
Zero

B
$\sqrt { 2 } \frac { h }{ 2\pi }$

C
$\sqrt { 6 } \frac { h }{ 2\pi }$

D
$\sqrt { 12 } \frac { h }{ 2\pi }$
Question 6
1 / -0

An iron $_{25}Mn^{x+}$ has the magnetic moment of 4.9 BM. What is the value of x ?

A
3

B
4

C
2

D
5

Solution
Question 7
1 / -0

An orange solid (A) on heating gave a green residue (B), a colourless gas (C) and water vapour. The gas (C) on passing over heated Mg gave white solid (D) which on reaction with water gave a gas (E). The gas (E) forms white fumes with HCl.
An orange solid A is

A
Sodium dichromate

B
Potassium dichromate

C
Potassium chromate

D
Ammonium dichromate
Question 8
1 / -0

The metal ion which is not colored is:

A
${ Fe }^{ 3+ }$

B
${ V }^{ 2+ }$

C
${ Zn }^{ 2+ }$

D
${ Ti }^{ 3+ }$

Solution
Question 9
1 / -0

The d-electronic configuration of ${ Cr }^{ 2+ },{ Mn }^{ 2+ },{ Fe }^{ 2+ }$ and ${ Ni }^{ 2+ }$ are ${ 3d }^{ 4 },{ 3d }^{ 5 },{ 3d }^{ 6 }$ and ${ 3d }^{ 8 }$ respectively. Which one of the following aqua complexes will exhibit the maximum paramagnetic character?

A
$\left[ \left( Fe\left( { H }_{ 2 }O \right) \right) _{ 6 } \right] ^{ 2+ }$

B
$\left[ \left( Ni\left( { H }_{ 2 }O \right) \right) _{ 6 } \right] ^{ 2+ }$

C
$\left[ \left( { C }{ r }\left( { H }_{ 2 }O \right) \right) _{ 6 } \right] ^{ 2+ }$

D
$\left[ \left( { Mn }\left( { H }_{ 2 }O \right) \right) _{ 6 } \right] ^{ 2+ }$
Question 10
1 / -0

Which of the following lanthanum ions is diamagnetic?

A
${ Ce }^{ 4+ }$

B
${ Sm }^{ 2+ }$

C
$Eu^{ 2+ }$

D
$Yb^{ 2+ }$

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Re-Attempt Weekly Quiz Competition

The d- and f- Block Elements Test - 64

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The d- and f- Block Elements Test - 64

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Question 1

Co2+Co^{2+}Co2+

Mn3+Mn^{3+}Mn3+

Cu+Cu^{+}Cu+

Ni2+Ni^{2+}Ni2+

Question 2

[ZnCl4]2−>[NiCl4]2−>[CoCl4]2−>[MnCl4]2− [ZnCl_4]^{2-} > [NiCl_4]^{2-} > [CoCl_4]^{2-} > [MnCl_4]^{2-} [ZnCl4​]2−>[NiCl4​]2−>[CoCl4​]2−>[MnCl4​]2−

[CoCl4]2−>[MnCl4]2−>[NiCl4]2−>[ZnCl4]2− [CoCl_4]^{2-} > [MnCl_4]^{2- } > [NiCl_4]^{2-} > [ZnCl_4]^{2-} [CoCl4​]2−>[MnCl4​]2−>[NiCl4​]2−>[ZnCl4​]2−

[MnCl4]2−>[CoCl4]2−>[NiCl4]2−>[ZnCl4]2− [MnCl_{ 4 }]^{ 2- }>[CoCl_{ 4 }]^{ 2- }>[NiCl_{ 4 }]^{ 2- }>[ZnCl_{ 4 }]^{ 2- } [MnCl4​]2−>[CoCl4​]2−>[NiCl4​]2−>[ZnCl4​]2−

[NiCl4]2−>[CoCl4]2−>[MnCl4]2−>[ZnCl4]2− [NiCl_{ 4 }]^{ 2- }>[CoCl_{ 4 }]^{ 2- }>[MnCl_{ 4 }]^{ 2- }>[ZnCl_{ 4 }]^{ 2- } [NiCl4​]2−>[CoCl4​]2−>[MnCl4​]2−>[ZnCl4​]2−

Solution

Question 3

decrease in atomic radii and increases in ionic radii

decrease in both atomic and ionic radii

increase in both atomic and ionic radii

increases in atomic radii and decrease in ionic radii

Question 4

242424

252525

262626

272727

Solution

Question 5

Zero

2h2π \sqrt { 2 } \frac { h }{ 2\pi } 2​2πh​

6h2π \sqrt { 6 } \frac { h }{ 2\pi } 6​2πh​

12h2π \sqrt { 12 } \frac { h }{ 2\pi } 12​2πh​

Question 6

3

4

2

5

Solution

Question 7

Sodium dichromate

Potassium dichromate

Potassium chromate

Ammonium dichromate

Question 8

Fe3+{ Fe }^{ 3+ }Fe3+

V2+{ V }^{ 2+ }V2+

Zn2+{ Zn }^{ 2+ }Zn2+

Ti3+{ Ti }^{ 3+ }Ti3+

Solution

Question 9

[(Fe(H2O))6]2+\left[ \left( Fe\left( { H }_{ 2 }O \right) \right) _{ 6 } \right] ^{ 2+ }[(Fe(H2​O))6​]2+

[(Ni(H2O))6]2+\left[ \left( Ni\left( { H }_{ 2 }O \right) \right) _{ 6 } \right] ^{ 2+ }[(Ni(H2​O))6​]2+

[(Cr(H2O))6]2+\left[ \left( { C }{ r }\left( { H }_{ 2 }O \right) \right) _{ 6 } \right] ^{ 2+ }[(Cr(H2​O))6​]2+

[(Mn(H2O))6]2+\left[ \left( { Mn }\left( { H }_{ 2 }O \right) \right) _{ 6 } \right] ^{ 2+ }[(Mn(H2​O))6​]2+

Question 10

Ce4+{ Ce }^{ 4+ }Ce4+

Sm2+{ Sm }^{ 2+ }Sm2+

Eu2+Eu^{ 2+ }Eu2+

Yb2+Yb^{ 2+ }Yb2+

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$Co^{2+}$

$Mn^{3+}$

$Cu^{+}$

$Ni^{2+}$

$[ZnCl_4]^{2-} > [NiCl_4]^{2-} > [CoCl_4]^{2-} > [MnCl_4]^{2-}$

$[CoCl_4]^{2-} > [MnCl_4]^{2- } > [NiCl_4]^{2-} > [ZnCl_4]^{2-}$

$[MnCl_{ 4 }]^{ 2- }>[CoCl_{ 4 }]^{ 2- }>[NiCl_{ 4 }]^{ 2- }>[ZnCl_{ 4 }]^{ 2- }$

$[NiCl_{ 4 }]^{ 2- }>[CoCl_{ 4 }]^{ 2- }>[MnCl_{ 4 }]^{ 2- }>[ZnCl_{ 4 }]^{ 2- }$

$24$

$25$

$26$

$27$

$\sqrt { 2 } \frac { h }{ 2\pi }$

$\sqrt { 6 } \frac { h }{ 2\pi }$

$\sqrt { 12 } \frac { h }{ 2\pi }$

${ Fe }^{ 3+ }$

${ V }^{ 2+ }$

${ Zn }^{ 2+ }$

${ Ti }^{ 3+ }$

$\left[ \left( Fe\left( { H }_{ 2 }O \right) \right) _{ 6 } \right] ^{ 2+ }$

$\left[ \left( Ni\left( { H }_{ 2 }O \right) \right) _{ 6 } \right] ^{ 2+ }$

$\left[ \left( { C }{ r }\left( { H }_{ 2 }O \right) \right) _{ 6 } \right] ^{ 2+ }$

$\left[ \left( { Mn }\left( { H }_{ 2 }O \right) \right) _{ 6 } \right] ^{ 2+ }$

${ Ce }^{ 4+ }$

${ Sm }^{ 2+ }$

$Eu^{ 2+ }$

$Yb^{ 2+ }$