D and F Block

Question 1

Definition of transition elements

Answer 1

D block elements having unpaired e- or partially

filled d-orbital in any O.S.

Question 2

elements that are not transition elements but they are d-block
elements.

Answer 2

Cd,Hg,Zn

Question 3

Elements in 3D series

Answer 3

Sc,Ti,V,Cr,Mn,Fe,Co,Ni,Cu,Zn

Question 4

Elements in 4D series

Answer 4

Y,Zr,Nb,Mo,Tc,Ru,Rh,Pd,Ag,Cd

Question 5

D block elements with Exceptional Electronic config

and the only element with a difference of 2 electron?

Answer 5

Nb Cu Cr Rg Mo Tc Ru Rh Pd Au Ag Pt
(Navab Cu kare(Cr) Raag Maut Tak Rooh Raah Pade Aur Aaj Pitaai hogi)

only Pd has a difference of 2 electrons and rest have only one electron difference

Question 6

why do transition elements have typical metallic properties

Answer 6

because they have strong metallic bonds, they are hard, and have high enthalpy of ionisation

Question 7

why do second and third transition series have greater enthalpies of atomisation

Answer 7

shielding effect

Question 8

shielding effect order of spdf

Answer 8

s>p>d>f

Question 9

mettalic bonds depends on?

Answer 9

unpaired electrons

Question 9

mettalic bonds depends on?

Answer 9

unpaired electrons

Question 10

why do MP and BP of transition elements increase at first and then decrease

Answer 10

because the metallic bonding increass first and decreses as they are directly realted to unpaired electrons which also first increase then decrease

Question 11

whats the most important feature of transition elements

Answer 11

low difference in energy of ns and (n-1)d

Question 12

radius order of transition elemtns

Answer 12

Question 13

oxidation state table

Question 14

whats the most common OS In 3D series

Answer 14

+2

Question 15

why are transition elemnts are good catalyts

Answer 15

because they have variable valencies, they form unstable intermediates with less activation energy
they have suitable surfaces for catalysts

Question 16

TI,Zr,Hf atomic radius order

Answer 16

Question 17

d block atomic readius order down the grp

Answer 17

Question 17

color of Fe2+ and Fe3+

Answer 17

Fe2+ :- green

Fe3+ :- yellow

Question 18

exception in the atomic radius order dwon the grp of d block

Answer 18

Question 19

O.S of Fe and NO in sodium nitroprusside

Answer 19

O.S. of Fe= +2

O.S. of NO= +1

Question 20

elements of D block first period

Answer 20

Sc Ti V Cr Mn Fe Co Ni Cu Zn

Question 21

Eu(Z=63) Electronic configuration

Answer 21

[Xe] 4f7 6s2

Question 22

the Cr-O-Cr bond in Cr2O7 ion (dichromate) is

Answer 22

non-linear and symmetrical

Question 23

KMnO4 on heating gives?

Answer 23

K2MnO4 (green) + MnO2(black) + O2

Question 24

V2O3, V2O4, V2O5 is basic or acidic or amphoteric?

Answer 24

V2O3:- basic V2O4:- less basic V2O5:- amphoteric

Question 25

CrO, Cr2O3 is basic or acidic or amphoteric?

Answer 25

CrO:- Basic Cr2O3:- Amphoteric

Question 26

Np(Z=93) electron configuration!?

Answer 26

4f14 5d10 6p6 7s2 5f4 6d1

Question 27

AgCl with water is soluble or insoluble?

Answer 27

insoluble

Question 28

CuCl2 with water is soluble or insoluble?

Answer 28

insoluble

Question 29

electronic configuration of Europium (Z=63)

Answer 29

Xe 4f7 6s2

Question 30

whats used in deacon's process

Answer 30

CuCl2

Question 30

whats used in deacon's process

Answer 30

CuCl2

Question 31

whats used in contact process

Answer 31

V2O5

Question 32

whats used cracking of HC

Answer 32

ZSM-5

Question 33

whats used in hydrogenation of vegetables oils

Answer 33

Ni

Question 34

which manganate is diamagnetic? permanganate or manganate

Answer 34

parmagnatiec is diamagnetic

Question 35

potassium permangantate heated forms?

Answer 35

Question 36

which is the only element in F block which doesnt forms MO2 oxide type

Answer 36

Yb

Question 37

mention a CeO2 use

Answer 37

used in oxidation of aldehyde and ketones

Question 38

whats the O.S of V in VOSO4

Answer 38

+4

Question 38

EuSO4 in aqueous condition is strong oxidizing or reducing agent?

Answer 38

reducing agent

Question 39

Cr2O3 is what kinda oxide

Answer 39

amphoteric

Question 40

RuO4 acts as reducing or oxidising agent and why?

Answer 40

it acts as Oxidizing agent as the OS of Ru is +8

Question 41

density order of Cr Zn Co Cu Fe

Answer 41

Question 41

density order of Cr Zn Co Cu Fe

Answer 41

Question 42

which metal shows the M2+/M electrode potential value positive and which metal shows the M+/M electrode potential value positive

Answer 42

Cu Ag

Question 43

mischmetal consists of metals from where? lanthanoid or actinoid or both or none?

Answer 43

lanthanoids

Question 44

which lanthanoid doesnt shos +4 OS?

Answer 44

Eu

Question 45

some lanthanoid oxides can be used as?

Answer 45

phosphorous

Question 46

does permanganate show satisfactory result in presence of HCl

Answer 46

nope

Question 47

going right in the period does the catalytic activity increases or decreases for D block?

Answer 47

for hydrogenation reactions | the catalytic activity increased from grp 5 to grp 11 with maximum activity shown by grp 7-9

Question 48

NaCl with K2Cr2O7 and H2SO4 forms?

Answer 48

Question 49

CrO2Cl with NaOH forms

Answer 49

Question 50

change

Answer 50

it

Question 51

the atomic radius of Ag is closest to?

Answer 51

Au

Question 52

composition of Ruby

Answer 52

Question 53

why is the color of this compound violet?

Answer 53

because is absorbs yellow light

Question 54

whats used in wacker's process(making of ethanol)

Answer 54

PdCl2

Question 55

TiCl4 + AlMe3 is used in?

Answer 55

preperation of polyethylene | zieglar natta catalyst

Question 56

are interstitial compound chemically reactive?

Answer 56

no

Question 57

Lu3+ is colorful or less?

Answer 57

color less as it has 4f14 config

Question 58

which has similar radius with Mo

Answer 58

W

Question 59

MnO2 with NaCl and H2SO4 forms?

Answer 59

.

Question 60

MnO2 with KOH and O2 forms?

Answer 60

Question 60

K2MnO4 with HCl

Answer 60

Question 61

KMnO4 with H2O and KI

Answer 61