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

Chlorine ki oxidation state ko x maan kar solve kar dena hai For eg-HClO4 mein Cl ki oxidation state ko x maano phir H ki toh +1 hoti hai aur O ki -2 toh aise +1+x+4×(-2)=0 (0 isliye kyoki whole molecule ka charge 0 hai) So,x ki value +7 hai Yes if you wish you can learn elemental oxidation states but its not necessary as much

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How to convert propene to acetone

Posted by Md Saquib 6 years, 2 months ago

CBSE > Class 12 > Chemistry

3 answers

Ritwik Choudhary 6 years, 2 months ago

STEP 3 - Deprotonation by a base which gives acetone

3Thank You

Ritwik Choudhary 6 years, 2 months ago

STEP 2- Attack of nucleophile water molecule on that carbocation which creates oxonium ion

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Ritwik Choudhary 6 years, 2 months ago

STEP 1- Protonation of alkene to generate a stable carbocation.

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ANSWER

What is hybridisation and magnetic behaviour [Fe(en)2cl] with hybridisation chart

Posted by Suryansh Dedha 6 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Sambhav Jain 6 years, 2 months ago

This molecule cannot exist As Chlorine should be two in number

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Last 10 year 12 th chemistry paper solved online net pe kaha kaise milenge esa konsa aap h jaha sara solved bord paper milega

Posted by Taru Hada 6 years, 2 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

The molality of 98% H2SO4 (density=1.8g/mL) by weight is:

Posted by Namrata Upadhyay 6 years, 2 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Canizaro reaction

Posted by Satyjeet Parihar 6 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Raman Brar 6 years, 2 months ago

Aldehyde or ketone undergo this reaction in which alpha hydrogen is not present .ie 2molecules of HCHO reacts with concentrated NaoH then it gives methanil and sodium formate.

2Thank You

ANSWER

Is ncert exemplar of physics biology and chemistry is required to be revised during board exams

Posted by Ankita Khatri 6 years, 2 months ago

CBSE > Class 12 > Chemistry

4 answers

The Heroism 6 years, 1 month ago

Nahi..

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Sambhav Jain 6 years, 2 months ago

Yes

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Aditya Chauhan 6 years, 2 months ago

Yaa u can do it if you want to score higher And previous year quetion paper are must at this golden time

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Ammu Shrivastav 6 years, 2 months ago

Kon see class m ho

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What should I do or buy to revise the whole syllabus of chemistry in last few days ?

Posted by Keshav Sarangal 6 years, 2 months ago

CBSE > Class 12 > Chemistry

3 answers

Priya Dharshini ? 6 years, 2 months ago

U can refer arihant and read short notes from any of the studying app to brush up ur concepts.... u can see vedantu sprint for chemistry it is really helpful which covers all the important questions

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Keshav Sarangal 6 years, 2 months ago

Don't give the silly answers plz... I'm just asking for sample papers

1Thank You

Ashish Sharma 6 years, 2 months ago

Just study pal

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ANSWER

In rs 299 ...is i get all sample papaer of chemistry...

Posted by Vishal Aryan 6 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Priya Dharshini ? 6 years, 2 months ago

Arihant u can purchase..i succeed book which contain previous years and new sample paper

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Ch2

Posted by Fozan Saifi 6 years, 2 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

can i complete my course of 7 chapters in 20 days of organic chemistry

Posted by Nitesh Sahu 6 years, 2 months ago

CBSE > Class 12 > Chemistry

3 answers

Naveen Bisht 6 years, 1 month ago

Yes

0Thank You

Niranjan Prajapati 6 years, 2 months ago

Of course.I am also in your categoty

1Thank You

Pritish Mishra 6 years, 2 months ago

Yes by reading mainly the preparations of organic compounds

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What is gabriel phthallamide reaction

Posted by Pritish Mishra 6 years, 2 months ago

CBSE > Class 12 > Chemistry

2 answers

Naveen Bisht 6 years, 1 month ago

Reaction is in book

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Abdeali Najmi 6 years, 2 months ago

Phthalimide when treated with alcoholic potassium hydroxide is easily coverted into potassium pthalimide which on treatment with alkyl halide followed by hydrolysis with acid or alkali yields phthalic acid and primary amine ?

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What is mustard oil reaction

Posted by Shubham Singh 6 years, 2 months ago

CBSE > Class 12 > Chemistry

2 answers

Abdeali Najmi 6 years, 2 months ago

Carbon di sulphide react with primary amine in presence of Hgcl2 to form alkali isothiocynaide which has mustard like odour

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Riya Kumari 6 years, 2 months ago

It is preparation of alkylisothiocyanates by heating together a primary amine,mercuric chloride &carbon disulphide

1Thank You

ANSWER

Any one can guess the important questions or topics for board xam 2020..... Plzzzz

Posted by Satyam Kumar 6 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Mahesh M 6 years, 2 months ago

Solution book back numerical entire organic mainly conversion and conc more in general principal

1Thank You

ANSWER

Which will react fastest for SN2 reaction CH3-I or CH3-Br?

Posted by Sonali Singh 6 years, 2 months ago

CBSE > Class 12 > Chemistry

4 answers

Riya Rana 6 years, 2 months ago

Ch3I because due to its larger size and big bond lenght it can easily be broken .

0Thank You

Vavi Neeraja 6 years, 2 months ago

CH3-I

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Avichal Yadav 6 years, 2 months ago

ch3-I will react faster as I is a good leaving group than Br...

1Thank You

Raman Gupta 6 years, 2 months ago

CH3_br

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Ncert 4.12 exercise question

Posted by Shubham Mewari 6 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Riya Rana 6 years, 2 months ago

Please write the question

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what is electrophilic substitution reaction

Posted by Chaitany Sahu 6 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Vemula Chowdary 6 years, 2 months ago

Electrophilic substitution reactions are chemical reactions in which an electrophile displaces a functional group in a compound, which is typically, but not always, a hydrogen atom. ... The other main type of electrophilic substitution reaction is an electrophilic aliphatic substitution reaction.

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In organic chemistry how much test is 12th syllabus.

Posted by Anish Das 6 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Tamanna Sharma 6 years, 1 month ago

Near about 20 tests

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Name the alloy used to make bullets and shells ?

Posted by Sushila Garkoti 6 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Ritss ?? 6 years, 2 months ago

Misch metal

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Why does ZnO appears yellow on heating?

Posted by Sristy Bose 6 years, 2 months ago

CBSE > Class 12 > Chemistry

4 answers

Neha Choudhary 6 years, 2 months ago

Ye chapter ni h sylabus me ch1

0Thank You

Riya Rana 6 years, 2 months ago

d-d transition on heating

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Shivshankar Pathkak 6 years, 2 months ago

In ZnO, Zn2+ ions occupy the interstitial sites and electrons are trapped in the interstitial sites for the neutralisation. Crystals that shows such type of defects are generally colored

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Yogita Ingle 6 years, 2 months ago

Metal excess defect due to the presence of extra cations at interstitial sites: Zinc oxide is white in colour at room temperature. On heating it loses oxygen and turns yellow

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How to study in a month

Posted by Ayush Kumar 6 years, 2 months ago

CBSE > Class 12 > Chemistry

3 answers

Vinay Gautam 6 years, 2 months ago

Yeh u r right

0Thank You

Riya Rana 6 years, 2 months ago

I think you should now stick with only ncert questions in chemistry because that is from where the maximum chances are to ask a question because in a month it is not only chemistry bht other subjects as well but if your entire syllabus is done then you are free to do sample papers for building up your confidence.

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Ujjwal Pratap 6 years, 2 months ago

Solve more sample papers and do more questions............you can only do this for one month. Nothing else

1Thank You

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Name the iupac name of (CCl3)3CCh3 ?

Posted by Ritss ?? 6 years, 2 months ago

CBSE > Class 12 > Chemistry