SPINELS: Normal, Inverse, Mixed | Easiest Explanation | Solved PYQs | CSIR NET | GATE

[@hirenbusa5102]

1) D 2) C || 2 Cr+3 cation so there is CFSE = 2*12 = 24 Dq

[@morgediyum8922]

normal

[@mhome6236]

Thanks

[@athirasnair4467]

Thanku

[@anushreebhats5444]

Thank you!

[@fatimah2955]

May Allaah bless you immensely... I used to be so confused on this concept and MashaAllaah you explained it so brilliantly...

[@AllBoutChemistry]

Thank you so much for the wishes 🥰

[@ranitram1728]

1st Q : ans. is option (d) Fe3O4 and NiFe2O4 are inverse spinels. 2nd Q : ans. is option (c) normal spinel with total CFSE -24 Dq.

[@100vip]

Yes

[@manjeshwariachari111]

Very good explanation sir... I understood.....I'm a lecturer.... U r my inspiration to take graduation clses ....

[@somdattarudra6151]

1 -D 2-C very nicely explained. thank you sir

[@beautyofscience7612]

Q. 1 D and Q. 2 ans is C.....thnku so much sir crystal clear concept now😍😍😍😍😇😇😇😇😇😇😇😇

[@khushbu4297]

Very good explanation sir thnqq☺️☺️☺️☺️

[@sameerasaleem7966]

This page really help me every time.. great job and thank you very much .. I really appreciate your effort to make things easy for us.🙂

[@mathankasthuri]

Thank you so much sir I don't have any idea about spinel you have to explain clearly in spinel one again thank you so much sir

[@AllBoutChemistry]

Glad to know that 😊

[@VinayKumar-ef5lt]

Very very easily explained..

[@kalaimanisundararaj5830]

Really fantastic explanation.

[@pragatisahu8042]

Thanku so much sir.. it was very confusing but you explained a very simple way.. .

[@thelastking9167]

According to author Ajay Kumar, MgFe2O4 is inverse Spinel

[@vishaljena5863]

tHANK YOU, sIR. cHOTA TOPIC THA. bAHUT BADHIYA SE AAPNE SAMJHAYA.. nA ZYTADA NA KAM.. pERFECT FOR eXAMS OBJECTIVE QUESTIONS.

[@gowsan658]

Crystal clear sir. Thank you so much 🙏

[@chandrugondavenkateswarlu8864]

sir this video is very useful to me,excellent explanation with prepared material.I want organic and pericyclic videos also

[@targetwitharjun7219]

You teaching style is very good, you explain all the things releted to topic

[@gowsan658]

Grateful to you master. 🙏

[@sonikumari9426]

Thanku so much sir. You are really make it easy

[@annudhiman77]

Cleared all the confusions😊

[@varshasailwal3195]

Sir this was very informative. Very nicely made and organised video.

[@athirasnair4467]

Sir, thank u so much... You done a great job sir🙏 hats off u sir🤝

[@srishtipriya6228]

Thank you so much!

[@chemistrynatural2874]

Great explanation sir

[@ajaybongoni1714]

Thank you ..ur lesson ..most usefull...

[@itsmenisa2024]

Than u Sir for making this concept simple

[@sairas6089]

Thanks sir nice explanation, all are very very clear

[@ManveerSingh-ip7mg]

Very good sir

[@firdosjahanzabiullah6707]

Thnx sir🙏

[@shalinimishra9497]

Ans 1) d inverse inverse Ans 2) c normal and -24dq for 2 cr+3

[@chetanmishra30]

2 ka ans how did u calculated can u plz miss shalini....

[@shalinimishra9497]

For 1cr III youll get -12 but here 2 cr are there so 12 *2 = 24

[@chetanmishra30]

Oo....oh ya we have to multiply it....thank u so much miss.....r u preparing fr csir?

[@susha9885]

How can scientists consider molecular term symbols like capital sigma phi Del from quantum chemistry????... Please reply

[@AllBoutChemistry]

kzbin.info/www/bejne/gWmliKieiLN9r8k Watch this video I've explained it here

[@susha9885]

Tq... Sir... I saw... But what is the link between these symbols and molecular term symbols???... Please reply

[@sivan9219]

Excellent trick Sir..

[@tapasmallik4599]

Sir in Gate 2012 one question was asking from cfse i.e Co3O4,Fe3O4,Mn3O4 which one is the inverse spinel structure...

[@vivakkandpal2520]

Fe3O4 is inverse..Co3O4 and Mn3O4 are normal...

[@sivaprabu6108]

Super explanation sir

[@najmulhoda4566]

Thanks sir to make it so easy

[@DivneyMusic]

Sir your lecture was awesome😊

[@arathiramachandranp8083]

Thank you

[@krishnabakchi8732]

Sir why Hg+2 ion not formed spinels.?????

[@Manishk519]

Sir plz explain 2nd question which you have asked

[@samrodriguez8111]

how can you compare Fe3+ and Zn2+ size along the period. As size of 3+ is always smaller than 2+.

[@trishaghosh5618]

I also have doubt..

[@chemistrywherethemistry]

Which have more d electron and compare electronegativity from left to right and than analysis size

[@himanshushrivastava8929]

Or u can think in this way (which i found helpful in solving such questions) .. Higher O.S will have more C.N. Here ... Fe = +3 (so it can be in octahedral) Zn2+ can be in tetrahedral. Therefore :- Normal spinel.

[@pavithraNarasiman]

How to find total cfse should we add both M+2&M+3 cfse together

[@poojakulal1154]

Yes

[@pujasarmah2030]

Sir ,what about Co3O4..as this rule it should be inverse but actually it is normal

[@nikitadubey9496]

1-d 2-Normal

[@Ramandeepkaur-pf6ey]

Sir pls make a video on angular overlap model

[@justflywithyourself]

Thank you sir

[@pg-trb-chemneetcsirchem5282]

1_d 2-c Thank you sir

[@rathodiya_chemistry.7319]

Nice sir very helpful

[@raji82]

Devudu 🙏

[@suphalsen7711]

Awesome.... Thanks sir

[@kumarsunil7530]

1-d and 2nd-c

[@sujathag3512]

11.18 Third point d5 is there Sir .Can u clarify that.

[@sreelakshmitr714]

Thank u so much sir

[@maryamdaneen7190]

Thank you 🙂

[@sujaltripathi3830]

High spin lenge ya low spin ????

[@krishnakumarg2664]

Very usefull

[@sreelakshmitr714]

Sir, pls make video on water exchange and isomerism

[@aditiagrawal4515]

Sir thank you. 1) d 2)c

[@kalaimanisundararaj5830]

What about Co3O4?

[@reshmajolly5892]

Calculate % of occupancy of Ni+2 ion Oh void in spinel NiAl2O4 having λ=0.4? How to solve such questions?

[@mukundsharma2607]

Is the answer 10%?

[@Sai-qb2fh]

@@mukundsharma2607 No 20 %

[@jeyarajsekar5926]

Thank you very much sir!

[@shaikhrizwan191]

Thank you 😊

[@sureshkumargunupuru4824]

Can you please explain co3co4

[@rajnishsinghrajput280]

In last question the total cfsc is -12 Delta. But in option it is not there ,so suggest the correct answer.

[@cnschemistry8109]

2 Ions of Cr3+ is here so it becomes 2*12=24Dq

[@sharmisharmila8531]

@@cnschemistry8109 thank you sir

[@tanushreesutradhar6769]

Very helpful

[@pratimasharma7730]

M(Al2O4) M= Fe,Co,Ni,Zn ??? How these are normal spinels??

[@AllBoutChemistry]

These are exceptional cases where Al+3 has a strong affinity towards oh voids. So they will be Normal Spinel always.

[@pratimasharma7730]

@@AllBoutChemistry okay sir!!.. Thankyou!

[@ranitram1728]

@@AllBoutChemistry normal spinel even for Ni2+ (d8)?

[@parveenahmed2166]

Sir, plz do the second question

[@maripandianp492]

What is the condition for mixed spinels?

[@nailaraavi9941]

Thank u sir 😊

[@krushna7459]

NiAl2O4 में Ni +2 ka hybridisation kya आयेगा???

[@NEHAKUMARI-zt1ro]

Sir cfse high spin k lie ya low spin k lie nikanle

[@designerworld7972]

High spin

[@designerworld7972]

Because oxygn is weak fild lignd

[@mamtagupta6092]

Nice....

[@Aajkafun1]

Sir second last ka answer (d) aayega and for last normal spinel and -24 Dq aayega.

[@Preet-multani]

Sir, is this topic important for csir net or not?

[@hafijulislam5019]

1 d 2 is normal What about total cfse

[@satyanarayandubey7885]

It will be -24Dq

[@satyanarayandubey7885]

If you find the cfse of cr in +3 you will get -12, but their r 2 cr present in +3 state therefore u will get-24 Dq

[@swapnildodhad2037]

Plzzz make videos on isolable analogy

[@AllBoutChemistry]

kzbin.info/www/bejne/pITJYWaspZtklbc It's already there, plz check

[@readyon3506]

what's the mixed spinel of MgAl2O4 ?

[@Nandu560]

Normal spinel

[@ultimateanswers2830]

Qn1 option d Qn2 option c

[@parishnadutta3406]

Sir Co3O4 is normal or inverse

[@josechemistryintamil11than53]

Spinel

[@swapnildodhad2037]

Sir plzz answer this question SnCO2O4 This is normal or inverse spinel

[@ranitram1728]

Normal spinel!

[@himanshushrivastava8929]

It's normal spinel.

[@adityayadav649]

3:17 pr A+ tetrahedral voids m hi jata hai

[@msd8264]

1 answer d. Second one is normal but cfse is confuse sir

[@amitdey4743]

1-d 2-c

[@rajkumarpr5269]

Sir Co3O4??

[@khanaadil1817]

May Allah bless u...

[@abhinavkumarsingh5747]

1(d) & 2(c)

[@ananthkumar864]

Trans effect make vedio sir

[@AllBoutChemistry]

Ok I'll try

[@satvinderkhatker9813]

1-d & 2-c

[@sumanaraychemistry4478]

Is it imp for csir

[@manab_kalita_iitg]

1.d & 2.c

[@sureshkumargunupuru4824]

1 ) d, 2)c

[@beingchemist8086]

1)D 2) Normal spinel & -24dq

[@RSivaSanjayChannel]

Bro, while filling up Electrons in cfse Should we always fill all the orbitals? I mean shouldn't we pairup after filling all the lower orbitals?

[@beingchemist8086]

@@RSivaSanjayChannel bro while filling electron's into Orbitals based on strong field or weak field ligands first prefer to fill t2g then go to eg orbitals with weak field ligands

[@RSivaSanjayChannel]

@@beingchemist8086 so he filled them all in that manner(in the beginning of the video) because, Oxygen is a weaker ligand

[@beingchemist8086]

@@RSivaSanjayChannel yes O2- is weak lingand

[@ravirocket8353]

Q1 ans option d. Q2 option c

[@mattikore5796]

Among the compound fe3o4

[@sarathidas2575]

2 number example pe Both are tradition metal so According to 4. No point of ur This will inverse..

[@sukladas5426]

1) d 2) c

[@saikatpal9761]

Question 1...answer d...Question 2...answer c

[@bhargaviyarlagadda1881]

Q1 option d Q2 option c

[@Rashayanic]

1.d 2.c

[@krishpriya3301]

1) ans D 2) ans A

[@sooryaprakashkv5424]

1)D 2) C

[@manishaizardar2702]

How 2nd ans c plzz explain how come to 24 dq

[@SimranjeetKaur-uv9ks]

1(d) 2(a)

[@SeemaYadav-mt4ej]

How did this cfse value come out ?

[@SimranjeetKaur-uv9ks]

@@SeemaYadav-mt4ej cfse value 12 aa rhi h ... Mujhe b doubt h isme .. 15.5 aas paas lga isliye bol diya a

[@saikatpal9761]

2 Cr (+3) ions are present..so 12Dq ×2 = 24Dq