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

Not necessary Bt if you want that sub for your higher studies,you should write it once more..... Is that sub physics??? If yes....don't worry friend The corrections will be liberal....

1Thank You

Tamanna Sharma 5 years, 9 months ago

Yes if you want to opt this subject for higher study but if English then it's compulsory to pass in it

0Thank You

ANSWER

Is ethylene-di-amine a chelating ligand???

Posted by Asna Khan 5 years, 9 months ago

CBSE > Class 12 > Chemistry

5 answers

Asna Khan 5 years, 9 months ago

Thanku#shreya

0Thank You

Shreya .. 5 years, 9 months ago

All polydentate ligands are chelating ligands asna......

1Thank You

Nishant Sharma 5 years, 9 months ago

YES.BECAUSE IT FORMS RING STRUCTURE..

1Thank You

Asna Khan 5 years, 9 months ago

Yeah i know that..... Bt a chelating ligand is that a ligand can bind through 2 donor atoms....same definition for bidentate alsooo..... So ask tht question....

0Thank You

Sanchari Roy 5 years, 9 months ago

Its a bidentate ligand.

1Thank You

ANSWER

Sucrose is a reducing sugar । Give reason......

Posted by Tapan Pandey?? 5 years, 9 months ago

CBSE > Class 12 > Chemistry

5 answers

Tapan Pandey?? 5 years, 9 months ago

0Thank You

Tamanna Sharma 5 years, 9 months ago

It's ok, vaise me phele hi samaj gai thi ki wrong typing he

1Thank You

Tapan Pandey?? 5 years, 9 months ago

Sorry..... typing error......?

1Thank You

Kriti Sharma 5 years, 9 months ago

Non reducing Sugars are those Sugars which do not have free aldehydic or Ketonic group and do not reduce fehling's solution on tollens reagent are called non reducing Sugars .....for example sucrose

1Thank You

Tamanna Sharma 5 years, 9 months ago

Sucrose is not reducing sugar it's non reducing sugar reason- not give fehling and tollen test

1Thank You

ANSWER

Yaar? till now i have not revised anything. How to revise complete chemistry in 2 days

Posted by Gaurav Rawat 5 years, 9 months ago

CBSE > Class 12 > Chemistry

5 answers

Vishal Pathak 5 years, 9 months ago

Just do those intext and back exercise ques. , refer to answers .. This way u will be revising the concepts and will also be getting ready to answer the same ques. in the exam itself ??

0Thank You

Nishant Sharma 5 years, 9 months ago

???????????

0Thank You

Kriti Sharma 5 years, 9 months ago

Why why !!!! Ist of all are you crazy ....but now dont feel tensed ...... Start revising chemistry in everyday life, polymers ,biomolecules, solutin ,surface chemistry ,metallury as these are esy and scoring ........see previous year questions of these chapters,' jo bhi karna ,wo perfectly karna okkkk '' udta udta ni.......learn naming reactions by heart ..one of them will surely come ,,,,surely!!!!! Understand....read notes of p block and dand f block elements ....get the pattern and you can solve the questions,,, GO AND SEE VEDANTU VIDEO OF ORGANIC CHEMISTRY SPRINT......it will be really helpful ....you wil get a basic idea by this video....????????????????????

0Thank You

Prakriti Semwal 5 years, 9 months ago

Tumne jo notes banae honge usse revise karo. Book padhne mat baith jana.

0Thank You

Rishabh Saxena 5 years, 9 months ago

Don't be panic say all is well ?

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ANSWER

Sign this petition https://www.change.org/p/cbse-cbse-physics-2020-appeal-for-lenient-checking

Posted by Saurabh Sharma 5 years, 9 months ago

CBSE > Class 12 > Chemistry

5 answers

Meghna Shrivastav? 5 years, 9 months ago

No site is open

0Thank You

Da Ya 5 years, 9 months ago

Not opening ur site

0Thank You

Saurabh Sharma 5 years, 9 months ago

And spread it as much as you can

0Thank You

Meghna Shrivastav? 5 years, 9 months ago

Offcourse

1Thank You

Vishal Singh 5 years, 9 months ago

Yes

2Thank You

ANSWER

SN2 mechanism.

Posted by Ayush Gautam 5 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Ashok Kumar 5 years, 9 months ago

Transisiton state formed in this mechanism and inversion occurs

0Thank You

ANSWER

Maximum oxidation state of nitrogen?

Posted by Akshay Tomar 5 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Tamanna Sharma 5 years, 9 months ago

+5 and covalancy is 4

0Thank You

Yogita Ingle 5 years, 9 months ago

In nitrogen, the oxidation states from +1 to +4 tend to disproportionate in acidic solution.

0Thank You

ANSWER

In ncert chap 11 alcohol phenol ether ncert back excecise ques 11.23 ka 5 ques

Posted by Ajax Shrimali 5 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Asna Khan 5 years, 9 months ago

1-Ethoxy-4,4-dimethylcyclohexane 4ethoxy is wrong one.... Bcoz ,when we start numbering ether have more preference than methyl group?

3Thank You

Pranjali Pandey 5 years, 9 months ago

4-ethoxy-1,1-dimethylcyclohexane

5Thank You

ANSWER

What are zwitter ions ????

Posted by Armaan Gur_Jar 5 years, 9 months ago

CBSE > Class 12 > Chemistry

5 answers

Armaan Gur_Jar 5 years, 9 months ago

Thanks Ka La. I m proud of ur CHEMISTRY. ?????

1Thank You

Sanchari Roy 5 years, 9 months ago

Sorry, it will be accepting a proton by amino group

1Thank You

Meghna Shrivastav? 5 years, 9 months ago

Zwitter ion is the dipolar ion

2Thank You

Sanchari Roy 5 years, 9 months ago

The dipolar ion formed due to lossing of a proton from the carboxyl group and accepting of a proton from amino group of an amino acid in aqueous solution is called zwitter ion.

2Thank You

Ka La 5 years, 9 months ago

Ions in twitter server is known as zwitter ions ??

1Thank You

ANSWER

Syllabus in2020

Posted by Robin Kapoor 5 years, 9 months ago

CBSE > Class 12 > Chemistry

3 answers

Saurabh Sharma 5 years, 9 months ago

Wrong Nancy Bagoria solution is included

0Thank You

Varun Chawla 5 years, 9 months ago

Solution is included in syllabus but solid state is not in syllabus

0Thank You

Nancy Bagoria 5 years, 9 months ago

Solution or p block ke 15 group ke alawa saara

0Thank You

ANSWER

What is assetion reason

Posted by Abhishek Giri 5 years, 9 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Is h2so4 a oxidising or dehydrating agent??

Posted by Max Creations 5 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Sanchari Roy 5 years, 9 months ago

H2SO4 is a powerful dehydrating agent but in hot and concentrated form it is a moderately strong oxidising agent. You may refer to NCERT as well as Xamidea books.

0Thank You

Shubham Ganvir 5 years, 9 months ago

Dehydrating

1Thank You

ANSWER

Biomolecules me kya important h

Posted by Shalini Singh 5 years, 9 months ago

CBSE > Class 12 > Chemistry

7 answers

Lakshya ? 5 years, 9 months ago

Kriti tum toh kuch jyda hi bhavnao m beh gyii....

0Thank You

Tamanna Sharma 5 years, 9 months ago

Kriti ne to biomolecules yahi revise kar diya

2Thank You

Abhishek Kumar 5 years, 9 months ago

Solve only chapterwise previous years question bank Arihant... This will help you to score 90% because in chemistry, question were repeating Every year

0Thank You

Kriti Sharma 5 years, 9 months ago

In biomolecules ,one of the most important concept is that of' reducing and non reducing Sugars '....you must know that reducing Sugars are those that reduce :fehling's solution and tollens reagent :and nonreducing are the just opposite of that.... second important thing is ::preparation of Carbohydrates ;like how are they prepared how is fructose prepared, structure ,cyclic structures haworth structures, reactions of glucose ......amino acids,, proteins and you must know about nucleic acids that is important....... questions always comes from scientific name of Vitamins like scientific name of Vitamin B1 is thiamine .....vitamin B2 is riboflavin...... vitamin B6 pyridoxine Vitamin C is ascorbic acid.... and the question from CBSE 2019 was..... what are the expected products of hydrolysis of lactose???? such sort of questions arises from the chapter ...........all the linkages like peptide linkage ,glycosidic linkage, you must know ??????????

1Thank You

Vishal Kaushik 5 years, 9 months ago

A biomolecule or biological molecule is a loosely used term for molecules and ions present in organisms that are essential to one or more typically biological processes ...

0Thank You

Shalini Singh 5 years, 9 months ago

Btaye

1Thank You

Ka La 5 years, 9 months ago

Only reproduction part.

0Thank You

ANSWER

Evidence of glucose important h kya

Posted by Shalini Singh 5 years, 9 months ago

CBSE > Class 12 > Chemistry

5 answers

Shalini Singh 5 years, 9 months ago

0Thank You

Tamanna Sharma 5 years, 9 months ago

Yes because 1marker me aa ne ke full chance hai

0Thank You

Shalini Singh 5 years, 9 months ago

Haa h...

0Thank You

Sanchari Roy 5 years, 9 months ago

Its not there in NCERT.

0Thank You

Shalini Singh 5 years, 9 months ago

Plz ans?

0Thank You

ANSWER

Physics moderation 2020

Posted by Mahesh M 5 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Mahesh M 5 years, 9 months ago

0Thank You

Vashu Yadav 5 years, 9 months ago

I think its not in 2020

0Thank You

ANSWER

Yaar i am very tensed for Chemistry. How to revise it.

Posted by Gaurav Rawat 5 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Aman Kumar 5 years, 9 months ago

Don't waste time, in taking tension.. jitne time mai tum tension karoge , utne derr mai ek chapter revise ho jayega.......JUST GIVE YOUR BEST. And leave it whatever will the result....last mai sab acha hi hoga

0Thank You

ANSWER

Why red phosphorus less reactive than white phosphorus.?

Posted by Sumit Roy 5 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Tamanna Sharma 5 years, 9 months ago

Due to sterogenic hindrence in red phosphorus

1Thank You

Riya Rana 5 years, 9 months ago

Bro it is not in syllabus...

2Thank You

ANSWER

Kya set 1 or set 2 ko grace mil raha 8 marks ka???????

Posted by Meghna Shrivastav? 5 years, 9 months ago

CBSE > Class 12 > Chemistry

6 answers

Armaan Gur_Jar 5 years, 9 months ago

Why not set 3 ??????????????☹☹☹☹☹

0Thank You

? ? 5 years, 9 months ago

No....the news was fake.....it was a screenshot of previous year board exam(2019).....no such statement has been made by board till now

0Thank You

Vashu Yadav 5 years, 9 months ago

Kya set 3 ko mil rahe h

0Thank You

Meghna Shrivastav? 5 years, 9 months ago

I am asking

0Thank You

Lakshay Khatri 5 years, 9 months ago

set 3 ko kuy nhi mila

0Thank You

Meghna Shrivastav? 5 years, 9 months ago

In physics

1Thank You

ANSWER

Kitne ch kar Liye abhi tak

Posted by Only A User 5 years, 9 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Only important Topics are Sufficient or not for exam ya full chapter k notes padne padenge

Posted by Only A User 5 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Uknow K 5 years, 9 months ago

Full chapter, coz marks are not distributed chapter wise.

1Thank You

ANSWER

Difference between amylose and amylopectin

Posted by Shivani Tyagi 5 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Xyz Abc 5 years, 9 months ago

These two are components of starch Amylose is less branched Soluble in water Constitutes 15-20% starch Glycosidic linkage take place bw C1-C4 of alpha glucose In amylopectin... It is not soluble in water due to high branching Constitutes abt 80% of starch Glycosidic linkage take place bw C1 C4 carbon of alpha glucose and branching bw C1 and C6

1Thank You

ANSWER

Chapter wise weightage plzz ?

Posted by Sanskar Singh 5 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Uknow K 5 years, 9 months ago

Not available this time. Only portion wise distribution is there, into 3 parts-physical,inorganic,organic.

0Thank You

ANSWER

Where does water prrsent in the egg go after boiling the egg

Posted by Abhishek Yadav 5 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Sanchari Roy 5 years, 9 months ago

On boiling egg, proteins undergo denaturation and the water present in the egg gets absorbed/adsorbed on the denatured proteins probably through H2 bonding

4Thank You

ANSWER

Write down formula of Rochelle salt ??............. Answer it soon।।।।।।।।

Posted by Tapan Pandey?? 5 years, 9 months ago

CBSE > Class 12 > Chemistry