View
218
Download
0
Category
Preview:
Citation preview
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
1/72
METALLURGY-II- 4Hrs X1.5 =6 marks
1
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
2/72
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
3/72
Q 2.Name the process used for desilverisationo ea pr une ar
300 1300
lead molteninsilverof Conc.cmolten Zininsilverof Conc.
efficient-co partition===
3
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
4/72
[March 08 &09] (3Marks)
Parkes process is based on the following ac s r nc p e :
*Argentiferrous lead contains up to 2% silver o en z nc mo en ea can ecome
immiscible liquid mixture ,
300 times more soluble in the molten Zn layer com ared to that of molten lead* Zn Ag alloy solidifies more readily compared to that of molten lead ,when cooled.
4
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
5/72
Alexander ParkesDate of birth : 1831 12 29Date of death : 1890 06 29Birthplace : Birmingham, England
Credited as : Engineer metallurgist, invented the earliest form of lastic * The son of a brass lock manufacturer, Parkes was born on December 29, 1831, in Birmingham, England .* Parkes held 66 patents on processes and products related to electro plating and plastic development
5
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
6/72
6
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
7/72
Process: Argentiferrous lead is melted to 800 oC.It is mixed with molten zinc
As
silver
300
times
more
soluble
in
molten
zinc ,most of the Ag moves in to the Zn ayer.
On
cooling
,the
upper
Zn
Ag
alloy
solidifies
rs . s s mme o . The Zn Ag alloy is distilled in retort to
separa e
z nc
rom
s ver The traces of lead impurity is removed by
upe a on7
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
8/72
ng am agrams Ellingham diagrams are plots of change in
temperature for various reactions like the
elements
oxides obtained by plotting the standard free ener chan e v/s Tem erature for the oxidation process involving one mole of oxygen at various temperatures.
8
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
9/72
ng am agrams
9
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
10/72
The graphs for the formation of metal oxides .
increases with temperature The sudden chan e in the slo e of the ra hs
indicate M.P & B.P For
oxides
of
Ag
and
Hg
the
std.free energy
temperatures4A +O 2A O2Hg +O2 2HgO
The metal oxides placed below are stable
10
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
11/72
The metal of metal oxide placed below can
diagram The line for the formation of CO is arallel to
temperature axis as change in free energy
remains
constant. (S)
2(g) 2(g) The graph for the formation of CO has negative
slo e as entro increases and free ener decreases
2C (S)+ O2(g) 2 CO(g)
11
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
12/72
Q.5 With the help of the Ellinghams diagram,explain why silver oxide can be thermodynamically decomposed at relatively lower temperature [july 2009] (2 Marks)
Chan e in std.free
energy
change v/sTemperature curves
Ag & Hg crosses zero
line
&
their
change
in
s . ree energy become +ve even at lower tem erature
So these oxides become unstable & readily decompose on heating
12
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
13/72
Q.6With the help of the Ellinghams diagram, explain
manufacture of chromium from chromic oxide. [April 2007] (2Mark)
Std. Change in free energy va ue or e orma on o Al2O3 is always less than that
2 3. Al2O3 is more stable
Cr2O3(Chromic oxide)
Goldschmidt aluminothermic process
Cr2O
3+2Al Al
2O
3 +2Cr
13
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
14/72
Q.7 With the help of Ellingham diagram,explain why
carbon monoxide acts as reducin a ent in the production of cast iron from Haematite.(2Mark)
, .in free energy for the formation of Fe O is more than that of
formation
of
CO2 form
. ere ore s better reducing agent for Fe O below 710 0C.
Fe2O3 +3CO 2Fe +3CO2
14
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
15/72
Above 710 0C, the std
.
value for the formation of Fe O is more than
that
of
CO
formation
from Carbon(Coke) Hence above 710 0 C,
coke (carbon
)
is
better
reducing agent for Fe2O3.
Fe2 3 +3C
Fe
+3CO
15
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
16/72
Q 8.Explain the chemical reactions that occurduring the extraction of iron from haematite
ore by smelting in a blast furnace (3 Marks)
Q 9 Explain the chemical reactions that occur during the extraction of cast iron At i Zone o combustion ii zone of reduction iii)zone of slag formation of blast funace.
OR (3 Marks)Q 10 Draw a neat labelled diagram of blast
furnace used in the extraction of cast iron. Give
e c em ca reac ons a a e p ace n edifferent zones of the furnace. [April-2007]3Marks
16
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
17/72
Haematite Fe2O3 Magnetite Fe3O4 Limonite 2Fe O .3H O Siderite FeCO3
2
17
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
18/72
M ll r f Ir n F
I. Concentration of Haematite
with a current of water
calcination Vo at e mpur t es are remove . If there is any traces FeO, it is oxidised to
Fe2O3. The ore become orous .
18
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
19/72
19
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
20/72
20
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
21/72
A mixture of haematite Ore +lime stone+ Coke (8:1:4) is introduced in to a tall cylindrical blast urnace y means o cup ou e cone a e op
of the furnace.
Boshes
Hot air is blasted into the furnace just below the boshes using tuyers
I. Zone of combustion (1500 0 C)
C
(S)+
O2(g) CO2(g)+406kJDue to this exothermic reaction , the temperature
21
ra ses o a e com us on zone .
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
22/72
As the CO2 raises up the furnace,coke
combines
with
CO2 to
form
CO
CO + C 2CO 163kJ This reaction is endothermic. Therefore the
bottom(1500 0C) towards the top(400 0C)
22
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
23/72
0 0
At about 600 0C, Fe2O3 is reduced by CO to give
Fe2O3 +3CO
2Fe
+3CO2
furnace called pig iron or cast iron
III.Zone of sla formation: at 900 0CCaCO3 CaO + CO2
+
(flux) (gangue) (slag)
23
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
24/72
Q.12 What is the function of lime stone & coke in the smelting of haematite ? 1Mark
acts as flux 3
2
CaO +
SiO2 CaSiO3(flux) (gangue) (slag)
Coke roduces CO which acts as reducin
agent Fe2O3 +3CO 2Fe +3CO2
24
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
25/72
. of combustion in the blast furnace july 2009
Coke
burns
with
air
to
produce
carbon
dioxide C (S)+ O2(g) CO2(g)+406kJ
temperature raises to 1500 0C at the
25
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
26/72
IndustriallyI C dmportant Compounds
4hrs X 1.5 =hrs X 1.5
26
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
27/72
. Q.14 .With a neat labelled digram explain the
manu acture o caustic soda usin Nelson cell (July 07 &2011)
Principle:a a +
H2O H+ + OH
Na +, Cl , H+ and OH
During electrolysis, only H + ion reduced to H2 at
cathode .Similarly only Cl is oxidized to Cl2 at anode
e so ut on ecome r c er n a ons27
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
28/72
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
29/72
29
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
30/72
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
31/72
At Cathode;(Reduction) 2H+ +2e H2 At ano e : Oxi ation 2C 2e + C
2 The solution becomes richer in NaOH.It
collects in the catch basin at the bottom The
steam
is
circulated
to kee the electrolyte warm & to keep the pores clean and clear Purification: The 98% pure NaOH is further
31
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
32/72
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
33/72
Uses o NaOH: , In Baeyers process Re ining o petro eum & vegeta e oi
In
the
form
of
sodalime (NaOH +
CaO)
used
as decarboxylating agent In mercerizin cotton in textile industr in volumetric analysis
33
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
34/72
Manufacture of ammonia By Habers processQ.How is ammonia manufactured by Habers process?
Habers process involves the direct com nat on o 2 2
N2+ 3H2 2NH3 + Heat According to Le Chateliers principle ,The
followin
favorable
conditions
ive
better
ield
of ammonia; i)Finely divided Fe catalystii a romoter like Mo or K O or Al O .iii)a moderate temperature of 773K (500 0C)
34
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
35/72
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
36/72
It
is
thought
that
two
in
five
people
owe
their existence to the discoveries made by one brilliant chemist. However despite his incredible
discovery
many
people
still
call
Fritz
Haber a
mur erer. It has been suggested that without this process,
Germany
would
not
have
fought
the
war,
or
would have had to surrender years earlier
36
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
37/72
Manufacture of ammonia
By Ha er s process
37
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
38/72
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
39/72
Step III: Cooling The gaseous mixture is passed through
. 3Step IV: Recycling The unreacted gases are collected & recycled NH as
is
dried
over
CaO to
et li uor ammonia
39
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
40/72
In the manufacture of fertrilisers like ,
As refrigerant due to its high heat of
In the manufacture of HNO3 by Ostwalds
As a non aqueous solvent
2 3
process
40
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
41/72
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
42/72
Manufacture of H2SO4 by Contact process
42
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
43/72
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
44/72
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
45/72
45
St II P ifi ti f G
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
46/72
Step II; Purification of Gasesx ure
o
2
2 s
pur e
y
pass ng
through a series of Chambers;
1)Dust chamber: Steam
is
passed.
Steam
condenses on the dust articles which settle at the bottom
passing through cooling pipes
3)Scrubber: Water
is
sprayed
from
the
top
of the tower. Water soluble im urities are removed.
46
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
47/72
4) Cottrell precipitator: Electrically charged colloidal particles are removed
spraying Con.H 2SO4. 6)Arsenic purifier: As2O3 impurity is
removed
b
usin
Fe OH t. 7)Tyndall box: Pure & dry gas is passed
presence of colloidal impurities
47
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
48/72
Step III; Oxidation of SO2 to SO3. 0
passed
in
to
the
converter. 2 5
catalyst & maintained at 500 0C. 2SO2(g)+O2(g) V2O5 or Pt 2SO3(g)+188
48
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
49/72
SO3 gas is absorbed by using Con.H 2SO4
or Fuming sulphuric acid . SO3 + H2SO4 H2S2O7
(OLEUM)
O eum is care u y i ute wit ca cu ate amount of water to obtain 98% H2SO4.
H2S2O7 +
H2O
2H2SO4.
49
Q17 N h l d i h C
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
50/72
Q17.Name the catalyst used in the Contact
process
u y
mar
50
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
51/72
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
52/72
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
53/72
St III:C v r i n N Cr t N Cr
Na2CrO4 is treated with calculated amount of . 2 4 Na 2Cr2O7
2Na 2CrO4 +H2SO4 Na2Cr2O7 +Na2SO4 + H2O
The less soluble Na2SO4 crystals are removed
.
53
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
54/72
St IV:C v r i n N Cr t K Cr
treated
with
calculated
amount
of
KCl2 2 7 2 2 7
(Sod.dichromate) (pot.dichromate)
The solution is concentrated ,less soluble K2Cr2O7 separates out. The crystals are
removed
by
filtration.
54
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
55/72
As
primary
standard
in
volumetric
analysis Use to c ean g ass apparatus in t e orm o
Chromic acid Used in Chromyl test In Chrome tannin of leather As mordant in dyeing industry
55
Chemical properties of H SO
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
56/72
Chemical properties of H2SO4e y ra on
proper y: Q19.How does Conc.H 2SO4 react with oxalic acid
.
H2C2O4 +Conc.H2SO4 CO
+
CO2+[H2SO4.H2O]
. 2 4 2 4. 2
Oxidation propety:
. 2 4 reaction, H 2SO4 H2O + SO2 +(O)
2
2
c)H2S to S d)C to CO2 e)S to SO2 etc .
56
Q 20 H S cannot be dried with con H SO
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
57/72
Q 20.H 2S cannot be dried with con.H 2SO4.ve reason u y
Conc.H2SO4 oxidizes H2S to S H2S +ConH2SO4 SO2 +2H2O +S
Q. What happens when con.H 2SO4 reacts with
PCl 5? (
March11)
2mark
H2SO4 + PCl5 SO3H Cl + POCl3 + HClchlorosul honic acid
H2SO4 + 2PCl5 SO2Cl2 + 2POCl3 +2HCl
57
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
58/72
Q 22 Explain Chromyl chloride reaction ( june 2011)
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
59/72
Q 22. Explain Chromyl chloride reaction ( june 2011)
mar
W en a mixture o potassium ic romatecrystals and a water soluble chloride is heated with Con.sulphuric acid , red vapoursof chromyl chloride is evolved
K2Cr2O7 + 4KCl + Con.6H 2SO46KHSO + 2CrO Cl +3H O
(chromyl chloride)
59
Q Write the molecular formula of Chromyl
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
60/72
Q. Write the molecular formula of Chromyl
c or e.
une
mar
2CrO2Cl
2
60
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
61/72
61
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
62/72
jagadeeshaiah@gmail.com, 62
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
63/72
63
Q23.Mention two reasons for the formation of
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
64/72
(2m)
Hig c arge size ratio i.e ig po arization
power
64
Q 24.Why are transition elements &their
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
65/72
Q y
compoun s goo cata yst xp a n (2m)
Presence o vacant or ita s using w ic unstable intermediate compounds can be orme w c ecompose g v ng pro ucts
c)In
their
finely divided form
they
can
produce
lar e sur ace area for adsor tion
65
Q 25.Which among Cu+ &Cu+2 salts is
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
66/72
Q g
co oure 1m 2+
unpaired electron2+ 9 0 .
E.C of Cu+ :[Ar]3d 10 4s 0 No unpaired electron
4 2
4
66
Q 26.Among Sc3+(Z=21) &Cr3+(Z=24),which is
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
67/72
g ( ) ( )
co oure .
y (2m)
3+ 0.
In
Sc3+,there
are
no unpaired electron.
E.C of Cr3+ is [Ar]3d 3 4s 0
There are three unpaired electrons in 3d orbitals. Hence it should be paramagnetic &
coloured
67
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
68/72
Q 28.Write the electronic configuration of 3d series of + 3+
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
69/72
+ 3+.
are colourless ii)Zn 2+ ions are diamagnetic a)E.C of 3d series of elements
[Ar]3d (1 10)4s (1 2)
i) E.C of Cu+ :[Ar]3d 10 4s 03+ 0 0.
There are no unpaired electrons in both of them.
ere ore ey are colorless & diamagnetic .
ii) E.C of Zn2+ :[Ar]3d 10 4s 0
Zn2+
also
has
no unpaired
electron. It is also diama netic and colorless
69
Q 29.Name the transition metal in 3d series
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
70/72
w c
s ows
max mum
ox at on
state (1m)
maximum oxidation state of +7
permanganate solution
4
70
Wh F 3+ i n i m r ta l than F 2+i n?
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
71/72
.Wh F i n i m r ta l than F i n?
OR Sma er t e size ig er t e sta i ity
OR Higher the oxidation state ,more is the
stabilit
71
TH NK YOUH NK YOU
8/10/2019 e2_ppt.pdfbjvnfngoijpg nm hgigojh90-tkit94 v8ybicgbhjmkg l9h tmiy90ht jukvbkg v
72/72
TH NK YOUH NK YOU
WISH YOU GOOD LUCK
72
Recommended