D and F Block Flashcards
Definition of transition elements
D block elements having unpaired e- or partially
filled d-orbital in any O.S.
elements that are not transition elements but they are d-block
elements.
Cd,Hg,Zn
Elements in 3D series
Sc,Ti,V,Cr,Mn,Fe,Co,Ni,Cu,Zn
Elements in 4D series
Y,Zr,Nb,Mo,Tc,Ru,Rh,Pd,Ag,Cd
D block elements with Exceptional Electronic config
and the only element with a difference of 2 electron?
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
why do transition elements have typical metallic properties
because they have strong metallic bonds, they are hard, and have high enthalpy of ionisation
why do second and third transition series have greater enthalpies of atomisation
shielding effect
shielding effect order of spdf
s>p>d>f
mettalic bonds depends on?
unpaired electrons
mettalic bonds depends on?
unpaired electrons
why do MP and BP of transition elements increase at first and then decrease
because the metallic bonding increass first and decreses as they are directly realted to unpaired electrons which also first increase then decrease
whats the most important feature of transition elements
low difference in energy of ns and (n-1)d
radius order of transition elemtns
oxidation state table
whats the most common OS In 3D series
+2
why are transition elemnts are good catalyts
because they have variable valencies, they form unstable intermediates with less activation energy
they have suitable surfaces for catalysts
TI,Zr,Hf atomic radius order
d block atomic readius order down the grp
color of Fe2+ and Fe3+
Fe2+ :- green
Fe3+ :- yellow
exception in the atomic radius order dwon the grp of d block
O.S of Fe and NO in sodium nitroprusside
O.S. of Fe= +2
O.S. of NO= +1
elements of D block first period
Sc Ti V Cr Mn Fe Co Ni Cu Zn
Eu(Z=63) Electronic configuration
[Xe] 4f7 6s2
the Cr-O-Cr bond in Cr2O7 ion (dichromate) is
non-linear and symmetrical
KMnO4 on heating gives?
K2MnO4 (green) + MnO2(black) + O2
V2O3, V2O4, V2O5 is basic or acidic or amphoteric?
V2O3:- basic
V2O4:- less basic
V2O5:- amphoteric
CrO, Cr2O3 is basic or acidic or amphoteric?
CrO:- Basic
Cr2O3:- Amphoteric
Np(Z=93) electron configuration!?
4f14 5d10 6p6 7s2 5f4 6d1
AgCl with water is soluble or insoluble?
insoluble
CuCl2 with water is soluble or insoluble?
insoluble
electronic configuration of Europium (Z=63)
Xe 4f7 6s2
whats used in deacon’s process
CuCl2
whats used in deacon’s process
CuCl2
whats used in contact process
V2O5
whats used cracking of HC
ZSM-5
whats used in hydrogenation of vegetables oils
Ni
which manganate is diamagnetic?
permanganate or manganate
parmagnatiec is diamagnetic
potassium permangantate heated forms?
which is the only element in F block which doesnt forms MO2 oxide type
Yb
mention a CeO2 use
used in oxidation of aldehyde and ketones
whats the O.S of V in VOSO4
+4
EuSO4 in aqueous condition is strong oxidizing or reducing agent?
reducing agent
Cr2O3 is what kinda oxide
amphoteric
RuO4 acts as reducing or oxidising agent and why?
it acts as Oxidizing agent as the OS of Ru is +8
density order of
Cr Zn Co Cu Fe
density order of
Cr Zn Co Cu Fe
which metal shows the M2+/M electrode potential value positive
and which metal shows the M+/M electrode potential value positive
Cu
Ag
mischmetal consists of metals from where? lanthanoid or actinoid or both or none?
lanthanoids
which lanthanoid doesnt shos +4 OS?
Eu
some lanthanoid oxides can be used as?
phosphorous
does permanganate show satisfactory result in presence of HCl
nope
going right in the period does the catalytic activity increases or decreases for D block?
for hydrogenation reactions
the catalytic activity increased from grp 5 to grp 11 with maximum activity shown by grp 7-9
NaCl with K2Cr2O7 and H2SO4 forms?
CrO2Cl with NaOH forms
change
it
the atomic radius of Ag is closest to?
Au
composition of Ruby
why is the color of this compound violet?
because is absorbs yellow light
whats used in wacker’s process(making of ethanol)
PdCl2
TiCl4 + AlMe3 is used in?
preperation of polyethylene
zieglar natta catalyst
are interstitial compound chemically reactive?
no
Lu3+ is colorful or less?
color less as it has 4f14 config
which has similar radius with Mo
W
MnO2 with NaCl and H2SO4 forms?
.
MnO2 with KOH and O2 forms?
K2MnO4 with HCl
KMnO4 with H2O and KI
