d-Block

Question 1

Sc³⁺

Answer 1

Colourless

Question 2

Ti⁴⁺

Answer 2

Colourless

Question 3

Ti³⁺

Answer 3

Purple

Question 4

V⁴⁺

Answer 4

Blue

Question 5

V³⁺

Answer 5

Green

Question 6

V²⁺

Answer 6

Violet

Question 7

Cr³⁺

Answer 7

Violet

Question 8

Mn³⁺

Answer 8

Violet

Question 9

Cr²⁺

Answer 9

Blue

Question 10

Mn²⁺

Answer 10

Pink

Question 11

Fe³⁺

Answer 11

Yellow

Question 12

Fe²⁺

Answer 12

Green

Question 13

Co³⁺

Answer 13

Blue

Question 14

Co²⁺

Answer 14

Pink

Question 15

Ni²⁺

Answer 15

Green

Question 16

Cu²⁺

Answer 16

Blue

Question 17

Zn²⁺

Answer 17

Colourless

Question 18

Highest Melting Point in 3d

Answer 18

Cr

Question 19

Lowest Melting Point in 3d

Answer 19

Lowest 3d element -> Zn
Lowest transition element -> Mn

Question 20

Highest Melting Point in d-block

Answer 20

W

Question 21

Lowest Melting Point in d-block

Answer 21

Hg

Question 22

Highest Enthalpy of atomisation in 3d

Answer 22

V

Question 23

Lowest Enthalpy of atomisation in 3d

Answer 23

Zn

Question 24

Highest density in 3d

Answer 24

Cu >Ni (8.9 gcm^-3)

Question 25

Lowest density in 3d

Answer 25

Sc (3.1 gcm^-3)

Question 26

Highest density in d-block

Answer 26

Os > Ir

Question 27

Lowest density in d-block

Answer 27

Sc

Question 28

Lowest I.E in 3d

Answer 28

Sc

Question 29

Highest I.E in 3d

Answer 29

Zn

Question 30

Group 12 I.E trend

Answer 30

Hg > Zn > Cd

Question 31

Highest Oxidation state

Answer 31

+8
Os, Ru, Xe

Question 32

Reduction Potential E^o M²⁺/M trend of 3d

Answer 32

Ti²⁺ < Mn²⁺ < V²⁺ < Cr²⁺ < Zn²⁺ < Fe²⁺ < Co²⁺ < Ni²⁺ < Cu²⁺

Question 33

Reduction Potential E^o M³⁺/M²⁺ trend of 3d (only the ones with +ve value)

Answer 33

Co³⁺ > Mn³⁺ > Fe³⁺

Question 34

Catalyst of Contact Process of Sulphuric Acid

Answer 34

V₂O₅

Question 35

Catalyst of Ostwald Process of Nitric Acid

Answer 35

Pt / Rhodium

Question 36

Catalyst of Haber’s Process

Answer 36

Fe

Question 37

Catalyst of Alkene Hydrogenation

Answer 37

Wilkinson’s Catalyst
[Rh(PPh₃)₃Cl]

Question 38

Catalyst for Waker’s Process (Alkene->Aldehyde)

Answer 38

PdCl₂

Question 39

Catalyst for Zieglar-Natta Polymers

Answer 39

TiCl₄ + Et₃Al
(Stannic Chloride + TriEthyl Aluminium)

Question 40

Brass is Alloy of

Answer 40

Cu+Zn

Question 41

Bronze is alloy of

Answer 41

Cu+Ti

Question 42

UK Silver Coins are made of

Answer 42

Cu+Ni Alloy

Question 43

UK Bronze Coins are made of

Answer 43

Copper Coated Steel

Question 44

Photography Industry uses

Answer 44

AgBr (Light Sensitive)

Question 45

Dry Cell Cathode is

Answer 45

MnO₂

Question 46

Pigment Industry uses

Answer 46

TiO (White Pigment)