CBSE > Class 12 > Chemistry | CBSE Board | Homework Help

Ziegler–Natta catalyst is a type of a catalyst made from a mixture of chemical compounds that are mainly used in the synthesis of polymers belonging to 1-alkenes such as alpha-olefins which are hydrocarbons containing a double carbon-carbon bond.

A German chemist named Karl Ziegler in the year 1950 first demonstrated the use of the catalyst during the polymerisation of ethylene.

The Ziegler-Natta catalysts today usually contain many mixtures of halides belonging to transition metals like titanium, vanadium, chromium, zirconium and organic derivatives of non-transition metals especially that of alkyl aluminium compounds.

1Thank You

Sulekha Singh 6 years, 1 month ago

Titanium tetrachloride and triethylaluminium known as ziegler natta catalyst

1Thank You

ANSWER

Ellihgham diagram???

Posted by Kriti Sharma 6 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

The plot of variation of delta G° vs T for the formation of metal oxides from metals are called Ellingham diagram. Ellingham diagram can be use to determine the optimum temperature at which a particular metal can reduce the metal oxide of other metal... yrr tumhare rose se irritation ho ro hai abb pura content rosey rosey lag ra hai ???

3Thank You

ANSWER

Name the chief ore of silver?????

Posted by Kriti Sharma 6 years, 1 month ago

CBSE > Class 12 > Chemistry

4 answers

Nishant Sharma 6 years, 1 month ago

ARGENTITE OR SILVER GLANCE :) ????

1Thank You

Rajat Barwar 6 years, 1 month ago

Yes,argentite. It is found as native silver also.

1Thank You

Sanchari Roy 6 years, 1 month ago

Argentite.

1Thank You

Ayushi Singh 6 years, 1 month ago

Bauxite

0Thank You

ANSWER

How is pig iron changed into Steel???????

Posted by Kriti Sharma 6 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Nishant Sharma 6 years, 1 month ago

????

0Thank You

ANSWER

Are frnds aplog 15 group ki. Rxns yaad kroge

Posted by Neha Choudhary 6 years, 1 month ago

CBSE > Class 12 > Chemistry

5 answers

Neha Choudhary 6 years, 1 month ago

Ohk theek h

0Thank You

Riti Bansal 6 years, 1 month ago

N out of syllabus hai ab ye

0Thank You

Ritss ?? 6 years, 1 month ago

Ni Vo syllabus me hi ni hai ?

0Thank You

Boby Negi 6 years, 1 month ago

Ya kya h..!

0Thank You

Riya Rana 6 years, 1 month ago

Nah . .

0Thank You

ANSWER

Why electrolytic reduction is preffered over chemical reduction??

Posted by Raman Brar 6 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 6 years, 1 month ago

More reactive metals i.e, alkali metals and alkaline earth metals are usually extracted by electrolysis of their fused salts because in electrolytic reduction, by aplying external potential from outside soure, reduction can be brought easily. Further, more reactive metals have more affinity with oxygen than that of carbon. That's why electrolytic reduction is preferred over the chemical reduction.

0Thank You

ANSWER

NCERT examples + exercise + in-text Are sufficient to get good marks in chemistry without knowing the concept !! Only rattafication

Posted by Mirza Ubaid 6 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Riya Rana 6 years, 1 month ago

Sodium huypobromite (NaBrO)....!! --------> which actually means no bro....

0Thank You

Awantika Deora 6 years, 1 month ago

It may help you in IOC but not in OC N PC

0Thank You

ANSWER

Henry's law constant of CO2 in water ay 25°c is 3 ×10^-2 mol/L atm^-1 . Find the mass of the CO2 present in 100L of soft drink bottled with a partial pressure of CO2 of 4 atm at the same temparature .

Posted by Ritss ?? 6 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Ritss ?? 6 years, 1 month ago

It support material of govt scls

0Thank You

Anmol Sidhu 6 years, 1 month ago

Sry u dont know the answer but can you please tell me is it a ncert question or something else??? Please reply jaroor jrna

0Thank You

ANSWER

Find the volume of 75% of H2SO4 by weight (density=1.8 gm/ml) required to prepare 1L of 0.2M solution .

Posted by Ritss ?? 6 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Ritss ?? 6 years, 1 month ago

Kese

0Thank You

Awantika Deora 6 years, 1 month ago

14.5ml

0Thank You

ANSWER

Predict the order of reactivity of thr four isomeric bromobutanes in sn1 and sn2 reactions!!!

Posted by Anmol Sidhu 6 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Tamanna Sharma 6 years, 1 month ago

Sn1 3>2>1 and in sn2 1>2>3

0Thank You

ANSWER

Do all the structures in chemistry in everyday life needed to be learnt?

Posted by Shreya .. 6 years, 1 month ago

CBSE > Class 12 > Chemistry

3 answers

Riti Bansal 6 years, 1 month ago

Nope

1Thank You

Ankan Rastogi 6 years, 1 month ago

Noo

1Thank You

Pavan Adi 6 years, 1 month ago

My Experts said that learning just the function grps of the structures is enough. Wbu?

1Thank You

ANSWER

What are saturated solutions

Posted by Vansh Prajapati 5 years, 11 months ago

CBSE > Class 12 > Chemistry

34 answers

Sukraj Subba 6 years, 1 month ago

Solution in which no more solute is dissolve at same temperature and pressure is known as saturated solution

0Thank You

Awantika Deora 6 years, 1 month ago

Dude you guys chatting on a ask n answer platform pick some social networking site ???

1Thank You

Devraj Malviya 6 years, 1 month ago

Hiii

0Thank You

Vansh Prajapati 6 years, 1 month ago

Ban gya account

0Thank You

Aayushi Attri 6 years, 1 month ago

Okh

1Thank You

Aayushi Attri 6 years, 1 month ago

Tu kde toh kti inna raji hoja h....ki udta hua pkdna mushkil hoja h...kde inna sad hoja h...ki mnana okha hoja h...

1Thank You

Vansh Prajapati 6 years, 1 month ago

Or ravina k msg pr deta hu tu pass chng kar liye

0Thank You

Vansh Prajapati 6 years, 1 month ago

Yrr m abhi 1 account bnata hu

0Thank You

Vansh Prajapati 6 years, 1 month ago

Kya system

0Thank You

Aayushi Attri 6 years, 1 month ago

Sry...aage se nhi bolungi...bt yrr gussa aara h uspe mne....ke kru....ibb tu ae bta...??

0Thank You

Vansh Prajapati 6 years, 1 month ago

Pr mere liye to meri jnn sbse pyari rhegi hmesha

0Thank You

Aayushi Attri 6 years, 1 month ago

Okh jnn...

0Thank You

Vansh Prajapati 6 years, 1 month ago

Or tu jitne achhe words bolegi utni hi pyari lgegi or jitna glt bolegi utnu buri

0Thank You

Vansh Prajapati 6 years, 1 month ago

Na gaali mt diya kr tu 1 ldki h

0Thank You

Aayushi Attri 6 years, 1 month ago

Tera system smjh na aaya mere ibb tk...???

0Thank You

Aayushi Attri 6 years, 1 month ago

Aapka kya h jnab...aapki toh mahima aapram paar h...???

1Thank You

Vansh Prajapati 6 years, 1 month ago

Mne dekh kde vi kujh na hota daily exercise krta hu 6 km running krta hu nonstop

0Thank You

Aayushi Attri 6 years, 1 month ago

Yrr aabhi weather change hora h na isliye thodi si ho jati hu

0Thank You

Aayushi Attri 6 years, 1 month ago

Bdhiya vali

0Thank You

Vansh Prajapati 6 years, 1 month ago

Yrr tu kitni beemar hoya kre h

0Thank You

Aayushi Attri 6 years, 1 month ago

Uski baat na kre....gaali nikl jagi

0Thank You

Aayushi Attri 6 years, 1 month ago

Mar sali ke goli...

0Thank You

Vansh Prajapati 6 years, 1 month ago

Passwrd mang ri thi

0Thank You

Aayushi Attri 6 years, 1 month ago

Aur kl vo id aala panga hoga

0Thank You

Aayushi Attri 6 years, 1 month ago

Yrr...aesa kuchh na h....viral fever tha mujhe

0Thank You

Vansh Prajapati 6 years, 1 month ago

Parso raat mg ne msg req bheji teri id pe

0Thank You

Vansh Prajapati 6 years, 1 month ago

Ha yrr schhi

0Thank You

Aayushi Attri 6 years, 1 month ago

Yrr...dekhiye....nire pange hon lg ge mere geel toh...??

1Thank You

Vansh Prajapati 6 years, 1 month ago

Mar rha tha

0Thank You

Aayushi Attri 6 years, 1 month ago

Jee lag gya...do din...??

1Thank You

Vansh Prajapati 6 years, 1 month ago

Mne taan lga tha k tne vi chadd ditta

0Thank You

Vansh Prajapati 6 years, 1 month ago

BdhiyA jnn

0Thank You

Aayushi Attri 6 years, 1 month ago

Ke haal chaal...???

0Thank You

Aayushi Attri 6 years, 1 month ago

Hlo...

0Thank You

ANSWER

How many of you are preparing for jee also.

Posted by Tamanna Sharma 6 years, 1 month ago

CBSE > Class 12 > Chemistry

9 answers

Tamanna Sharma 6 years, 1 month ago

87 only , but you all guys are rocking in jan attempt, that's awesome

0Thank You

Rajat Barwar 6 years, 1 month ago

How were ur results of jee main jan??

1Thank You

Ankan Rastogi 6 years, 1 month ago

Advane only Cleared mains..

1Thank You

Yuvraj Singh 6 years, 1 month ago

Jee main + jee advanced both

0Thank You

Yuvraj Singh 6 years, 1 month ago

Me also

0Thank You

Uttam Kumar Paul 6 years, 1 month ago

Did u indirectly mean who goes to coaching

1Thank You

Shreya .. 6 years, 1 month ago

0Thank You

Lakshya ? 6 years, 1 month ago

I ?‍♂

0Thank You

Asna Khan 6 years, 1 month ago

Am not preparing for jee... Bt going to attend that.. Jz for an experience Well who doesn't

0Thank You

ANSWER

How many chapters did u prepared yet?

Posted by Aryaman Singh 6 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Shreya .. 6 years, 1 month ago

9 chapters

1Thank You

Tamanna Sharma 6 years, 1 month ago

1st part NCERT

1Thank You

ANSWER

whate is Ionic radious?

Posted by Abhishek Yadav 6 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Tamanna Sharma 6 years, 1 month ago

Parent atom se electron nikalne ya dalne ke bad jo cation ya anion banta he uss atom ki radii ko ionic radii kehte he, anionic radii> parent > cationic radii

1Thank You

ANSWER

Which is reducing oxide in seo2 and Teo2 and how?

Posted by Manabendra Chatterjee 6 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Riti Bansal 6 years, 1 month ago

Seo2

0Thank You

Sanchari Roy 6 years, 1 month ago

SeO2 is a more reducing oxide than TeO2 because reducing property of oxides of gr.16 decreases from SO2 to TeO2

0Thank You

ANSWER

Which one have more shielding effect?LANTHANOIDS OR ACTINOIDS

Posted by Asna Khan 6 years, 1 month ago

CBSE > Class 12 > Chemistry

4 answers

Riti Bansal 6 years, 1 month ago

Actinoid

1Thank You

Shatayu Ganvir 6 years, 1 month ago

Actinoids because 5f e-s have poor sheliding than 4f so actinoid contractiob has ahiger valur

1Thank You

Asna Khan 6 years, 1 month ago

Bt #tammanna_sharma actinoids have poor sheilding than lanthanoids...nah

1Thank You

Tamanna Sharma 6 years, 1 month ago

Actinoids

1Thank You

ANSWER

Out of carbon and carbon monoxide which is a better reducing agent at lower temperature range in the blast furnace to extract iron from oxide ore.???????????

Posted by Kriti Sharma 6 years, 1 month ago

CBSE > Class 12 > Chemistry

7 answers

Riti Bansal 6 years, 1 month ago

0Thank You

Nishant Sharma 6 years, 1 month ago

YEAH :)?????????

0Thank You

Kriti Sharma 6 years, 1 month ago

Yes it is co i searched it yaar?....

2Thank You

Nishant Sharma 6 years, 1 month ago

REVISE METALLURGY KIRTI :) ?????????? ANSWER IS CO.IT CAN BE EXPLAINED ON THE BASIS OF INTERSECTION OF CURVE WITH FE2O3 AND FE304 WITH CO AND CO2 CURVE.??????????????????

0Thank You

Sanchari Roy 6 years, 1 month ago

CO is a better reducing agent at low temperature.

0Thank You

Asna Khan 6 years, 1 month ago

Oops...am sorry yaar.... At low temperature i think carbon monoxide... Because coke or arbon is used for giving appropriate temperature nah..... Well i think you should search in google or anything else...

1Thank You

Asna Khan 6 years, 1 month ago

Carbon #ELLINGHAM_DIAGRAM

0Thank You

ANSWER

Imp.topic for 2020 chemistry paper

Posted by Dinesh Kodan 6 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Riti Bansal 6 years, 1 month ago

Organic chemistry

0Thank You

Shreya .. 6 years, 1 month ago

See previous year papers, you'll get to know....?

2Thank You

ANSWER

Differentiate between pig iron and cast iron????????

Posted by Kriti Sharma 6 years, 1 month ago

CBSE > Class 12 > Chemistry

8 answers

Nishant Sharma 6 years, 1 month ago

ALL I SEE IS ROSES? ?????????????

1Thank You

Tamanna Sharma 6 years, 1 month ago

babu rao aapte style to chemistry ke paper me marna wo bhi full gulabri ke sath Nishant and kriti

2Thank You

Nishant Sharma 6 years, 1 month ago

YE BABU RAO KA STYLE HAI?? #TAMANNA ?????????

1Thank You

Tamanna Sharma 6 years, 1 month ago

Boards me bhi advertise kiya he kya

3Thank You

Tamanna Sharma 6 years, 1 month ago

I think tum lux soap ki advertisement karke hi rahoge

2Thank You

Nishant Sharma 6 years, 1 month ago

CAST IRON- HARD BUT BRITTLE FORM OF RAW IRON PRODUCED BY MELTING AND COOLING OF PIG IRON.CARBON CNOTENT OF CAST IRON IS 3% WHEREAS PIG IRON CONTAINS ABOUT 4%OF CARBON. :) ???????????????? IT SEEMS YOU HAVE LOT OF DOUBTS IN METALLURGY.REVISE IT PROPERLY KIRTI????

3Thank You

Tamanna Sharma 6 years, 1 month ago

Pig iron- ( kacha loha) 4% carbon and various impurities,,,,,,,cast iron- pig iron + O2+ coke ( less 3% only) hard and brittle.

2Thank You

Asna Khan 6 years, 1 month ago

The iron obtained from blast furnace is called pig iron 'nd it contains 4% carbon &other impurities. Cast iron obtained by melting pig iron with scrap iron 'nd it contains 3% carbon. Thats all;

2Thank You

ANSWER

Contact method for preparation of sulphuric acid ... Imp. H kya ????

Posted by Saloni Verma 6 years, 1 month ago

CBSE > Class 12 > Chemistry

4 answers

Shreya .. 6 years, 1 month ago

Yeah

0Thank You

Pushkar Gupta 6 years, 1 month ago

And prepration of k2 cr2 o7 is also

0Thank You

Pushkar Gupta 6 years, 1 month ago

Ha bhai ayega confirm hai

0Thank You

Tamanna Sharma 6 years, 1 month ago

Yes

0Thank You

ANSWER

Copper and silver lie below in the electrochemical series and yet they are found in the combined state as sulphides in nature why????????

Posted by Kriti Sharma 6 years, 1 month ago

CBSE > Class 12 > Chemistry

5 answers

Nishant Sharma 6 years, 1 month ago

YES?????TAKIYAKALAM????????????

0Thank You

Nishant Sharma 6 years, 1 month ago

I HOPE THAT IT HELPS YOU. #KIRTI???????

0Thank You

Tamanna Sharma 6 years, 1 month ago

Ye har question ke bad roses banana tumhara takiyakalam he kya

1Thank You

Kriti Sharma 6 years, 1 month ago

Yes ??

0Thank You

Nishant Sharma 6 years, 1 month ago

MAYBE DUE TO STRONG POLARIZING POWER OR DUE TO HIGH TEMPERATURE INSIDE EARTH THEY REACT TO FORM SULPHIDES. :) ????????????????????????????

1Thank You

ANSWER

Distinguish between beeta -- D -- GALACTOSE And beeta -- D -- Glucose.........

Posted by Tapan Pandey?? 6 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Tamanna Sharma 6 years, 1 month ago

Although the structure was quite similar the only difference at C4 because glucose and galactose are c4 epimer

1Thank You

ANSWER

What will be the level of chemistry paper? any idea.! Or the level will be exactly like physics. ???

Posted by Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

CBSE > Class 12 > Chemistry

8 answers

Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

Best of luck guys. ?

1Thank You

Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

thanks all of you hope paper simple aaye. physics jesa dhoka na ho issue bar. ??

1Thank You

Aman Kumar 6 years, 1 month ago

Let's see

1Thank You

Lakshya ? 6 years, 1 month ago

Chemistry hr bar bhut easy hi ataa h....but esme marking thodi hard kr dete h....

3Thank You

Aman Kumar 6 years, 1 month ago

Darshana?, mai tumhara jada time waste nhi karunga?..aur na hi jada unwanted chats karunga?( jaisa ki tumne pichle baar bola tha) ...but ye bata do ki ...Tum kaisi ho?.Tum thik toh ho na? I mean, waha bahot dange ho rahe h.. that's I asked? apna dhiyan rakhna....nd All the best for exam

1Thank You

Meghna Shrivastav? 6 years, 1 month ago

Right ??

1Thank You

Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

ohk thanks ?

2Thank You

Aman Kumar 6 years, 1 month ago

According to me, I think ?chemistry paper will not be like physics paper..becz, pore boards mai ek subject hard aata hi hai and uska kota physics ne pura kar diya hai...but then also we can't take any risk...WO kehte hai na:- " Dudh ka jala chasch bhi.. fuuk-fuuk ke pita hai"??

5Thank You

ANSWER

Is structure of PVC,bakelite,nylon 6,6 is important

Posted by Shalini Singh 6 years, 1 month ago

CBSE > Class 12 > Chemistry