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

Isme H apne e- C ko de deta h or momentarily as H+ us compound ki vicinity me hi float krta h.... Jitne zyada H bonge utne zyada hyperconjugating structures honge or utni hi zyada stability hogi...... Aa gya madam smjh

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Deepa Chanwariya 8 years ago

The transfer of sigma e- of C-H bond in b/w C-C is called H-effect. Or Sigma - pie conjugation is called H effect

1Thank You

Aisha Grewal 8 years ago

Kisi ko ata v h ya ratttt k baithe ho sbi????

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ANSWER

What causes electrophoresis

Posted by Sonu Jindal 8 years ago

CBSE > Class 12 > Chemistry

2 answers

Aisha Grewal 8 years ago

Hi yr missing all of u

1Thank You

J Ranjan Parida 8 years ago

The movement of charged particles towards negative or positive electrode of colloidal solution under an applied electric field is known as electrophoresis

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ANSWER

Main main topics in chemistry

Posted by Pawan Awana 8 years ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Which of the 2 isomer of butane is more stable at 25° n but Del H= -120 kg/mol iso but = -130kg/mol

Posted by Go Pi 8 years ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Plz , change the topic

Posted by Pooja Bora 8 years ago

CBSE > Class 12 > Chemistry

8 answers

Pooja Bora 8 years ago

6 chapters only??

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Ayushi Tyagi 8 years ago

Wbu

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Yaduvanshi Yaduvanshi 8 years ago

1Thank You

Pooja Bora 8 years ago

Good

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Ayushi Tyagi 8 years ago

Physical done... Inorganic started

1Thank You

J Ranjan Parida 8 years ago

Me ne 8chapter

1Thank You

Pooja Bora 8 years ago

How many chapters u prepared?

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Ayushi Tyagi 8 years ago

Chl pdhai ki bat krte h..... Puch koi qsn

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ANSWER

What is meant by'reducing sugars'????

Posted by Anurag Yadav 8 years ago

CBSE > Class 12 > Chemistry

5 answers

Anurag Yadav 8 years ago

Ya ????

1Thank You

Go Pi 8 years ago

Functional groups like aldehydic or ketonic are free, then those sugars are kniwn as redusong sugars (maltose , lactose)

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Ayushi Tyagi 8 years ago

No need to say thnxx.... Frnds don't say thnxxz..... Okk

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Anurag Yadav 8 years ago

Thanxxxx

1Thank You

Ayushi Tyagi 8 years ago

The carbohydrates which can reduce both tollen's reagent as well as fehling's solution

4Thank You

ANSWER

Reason for stability of lyophilic sols?

Posted by Go Pi 8 years ago

CBSE > Class 12 > Chemistry

3 answers

Anurag Yadav 8 years ago

Charge present on the lyophilic sol

1Thank You

Go Pi 8 years ago

Done da

1Thank You

Ayushi Tyagi 8 years ago

They r highly hydrated

2Thank You

ANSWER

Haloalkanes easily dissolve in organic solvents,why?????

Posted by Anurag Yadav 8 years ago

CBSE > Class 12 > Chemistry

4 answers

Anurag Yadav 8 years ago

Ok I got it thanks???

1Thank You

Go Pi 8 years ago

Sufficient energy is released, when the bonds between the haloalkanes break, to break bonds between organic solvents. Hence the new bonds hence formed will be stronger.

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J Ranjan Parida 8 years ago

Due to covalent bonding between organic compound and haloalkane

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Ayushi Tyagi 8 years ago

The already existing forces between haloalkanes r very strong so they don't react with polar solvents bt react with non polar organic solvents like benzene

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ANSWER

Who have not yet decided to sleep!

Posted by Go Pi 8 years ago

CBSE > Class 12 > Chemistry

5 answers

Go Pi 8 years ago

Saw you getting angry! Cool! Chill up.. Hope you are :)

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Ayushi Tyagi 8 years ago

Bt i guess its 1:14 ryt now

2Thank You

Go Pi 8 years ago

Aushi you said your gonna sleep at 1:30

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Ayushi Tyagi 8 years ago

M bhi ni

1Thank You

J Ranjan Parida 8 years ago

Me philal nhi so rha hu okk

1Thank You

ANSWER

Important naming rxns.....nd easy way to learn them?

Posted by Sidharth Bhasin 8 years ago

CBSE > Class 12 > Chemistry

3 answers

Ayushi Tyagi 8 years ago

Gud idea

1Thank You

Anurag Yadav 8 years ago

Easy way u can check on utube

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Anurag Yadav 8 years ago

All name reaction approximately 30 r imp

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ANSWER

Anyone from kv

Posted by Go Pi 8 years ago

CBSE > Class 12 > Chemistry

5 answers

Nk Pandey 8 years ago

Nope ..mp wala ? AI

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Go Pi 8 years ago

Up border right?

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Go Pi 8 years ago

Cool!

1Thank You

Nk Pandey 8 years ago

KV sgrl

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Nk Pandey 8 years ago

I am

1Thank You

ANSWER

How many of you are studying leaving behind all aieshoaram??

Posted by Nk Pandey 8 years ago

CBSE > Class 12 > Chemistry

4 answers

Ayushi Tyagi 8 years ago

Ni... Khana pina m basic necessity me include krti hu

3Thank You

Nk Pandey 8 years ago

Khana pina chor k

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Ayushi Tyagi 8 years ago

Me bs kuch dino se

1Thank You

Go Pi 8 years ago

Sorry?

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ANSWER

How many chapters did you complete

Posted by S Divya 8 years ago

CBSE > Class 12 > Chemistry

10 answers

Anurag Yadav 8 years ago

Hmm ????

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Ayushi Tyagi 8 years ago

Same same?

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Anurag Yadav 8 years ago

I have also completed physical nd qp. of last year ...organic is still left

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Ayushi Tyagi 8 years ago

No organic still left... Wbu

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Anurag Yadav 8 years ago

#ayushi have u prepared chemistry??????

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Anurag Yadav 8 years ago

No of course not bt I was not giving ans. Only I was checking ans frm here

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Ayushi Tyagi 8 years ago

Ok sry u r anshu.... Bt which one... R u new over here

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Anurag Yadav 8 years ago

#ayushi plz listen to me I m not your frnd Rochie god promise ur misunderstanding try to understand

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Ayushi Tyagi 8 years ago

*done

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Ayushi Tyagi 8 years ago

Physical dine inorganic going on

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ANSWER

what are some imporatnt topics of d and f block element from which questions are come??

Posted by Samiksha Chaturvedi 8 years ago

CBSE > Class 12 > Chemistry

2 answers

Go Pi 8 years ago

Go through examples and book back. You'll get idea.

2Thank You

Ayushi Tyagi 8 years ago

Lanthanides contraction....

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ANSWER

A 6.90M solution of KOH in water contains 30% by mass of KOH. Calculated the density of the KOH solution. Molecular masses of KOH is 56 g/mol

Posted by Go Pi 8 years ago

CBSE > Class 12 > Chemistry

9 answers

Go Pi 8 years ago

Thanks yaar

0Thank You

Go Pi 8 years ago

-_- what? I asked that i wanted to cross check.

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Ayushi Tyagi 8 years ago

Sry i can't tell

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Go Pi 8 years ago

Numerical value? Answer dude

0Thank You

Ayushi Tyagi 8 years ago

I didn't solve it just told u the method...... I never do calculations except in the xam

1Thank You

Go Pi 8 years ago

What's the answer you get. I just wanted a cross check yaar

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Ayushi Tyagi 8 years ago

I hv answered dear... Plz check

1Thank You

Go Pi 8 years ago

I anyone trying?

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Ayushi Tyagi 8 years ago

30%by mass means 30 g of KOH is presnt in 70g of water.... Molarity is given..... Use it to find volume of KOH n then use density =mass/volume.... U will get ur answer

1Thank You

ANSWER

Hey anyone going previous year question paper wise? Or even one are going chapter wise from ncert?

Posted by Go Pi 8 years ago

CBSE > Class 12 > Chemistry

9 answers

Nk Pandey 8 years ago

Started from inorganic rush less now at organic waiting station

2Thank You

Ayushi Tyagi 8 years ago

I hv just cmpltd physical now inorganic going on

1Thank You

Go Pi 8 years ago

Same here! How many chapters over? I not able to complete anylesson very properly. sO I'm JUST Brushing UP WITH Previous YEAR Questions

0Thank You

Anurag Yadav 8 years ago

10 years papers of outside delhi

1Thank You

Ayushi Tyagi 8 years ago

Pprs done... Now chapter wise revision going on

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J Ranjan Parida 8 years ago

Both

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Go Pi 8 years ago

Oh!cool. From which year?

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Sushmita Mishra 8 years ago

Both

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Anurag Yadav 8 years ago

Previous year papers+ ncert

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ANSWER

Which component of starch is a branched polymer of alpha glucose and insoluble in water??????

Posted by Anurag Yadav 8 years ago

CBSE > Class 12 > Chemistry

2 answers

Go Pi 8 years ago

Amylopectin*

1Thank You

Go Pi 8 years ago

Amtlopectin

1Thank You

ANSWER

From where to start organic or physical???

Posted by Rida Khan 8 years ago

CBSE > Class 12 > Chemistry

3 answers

Ayushi Tyagi 8 years ago

If u hv pcm then start with physical otherwise with organic

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Anurag Yadav 8 years ago

Start with physical because marks weightage is more from this

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Diya Dyan 8 years ago

Which one is toughest then start with it....

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ANSWER

How to prepare chemistry?

Posted by Vidushi Jain 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Swati Bhandari 8 years ago

Pado prepare ho jaya ge ??

1Thank You

ANSWER

Someone can explain ellingham diagram its urgent...

Posted by J Ranjan Parida 8 years ago

CBSE > Class 12 > Chemistry

4 answers

Ayushi Tyagi 8 years ago

Jr mne ek qsn post kiya tha... Ek bar niche jake dekh le plz

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Ayushi Tyagi 8 years ago

Wlcm... Anything for my frnds

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J Ranjan Parida 8 years ago

Thanks yrr

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Ayushi Tyagi 8 years ago

Bs ye yad rkhna h k jo niche vala curve h vo upr vale ko reduce kr dega..... Or ek do k graph yad rkhiyo jse ki Mn or Al vala.... Baki ek blast furnace vala qsn h NCERT me vo imp h

1Thank You

ANSWER

P block elements important bata do

Posted by Om Gupta 8 years ago

CBSE > Class 12 > Chemistry

3 answers

Anurag Yadav 8 years ago

Reasoning ,structures,reactions

1Thank You

Adarsh Agrahari 8 years ago

Electronic configuration Metal name Physical and chemical properties

1Thank You

Virangna Roy 8 years ago

Hlo

1Thank You

ANSWER

Radius ratio for tetrahedral voids??

Posted by Anurag Yadav 8 years ago

CBSE > Class 12 > Chemistry

2 answers

Anurag Yadav 8 years ago

Ans do koi

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Abc Arora 8 years ago

0.225 to 0.414

1Thank You

ANSWER

Whts the Best way to solve conversion

Posted by Nk Pandey 8 years ago

CBSE > Class 12 > Chemistry

3 answers

Nk Pandey 8 years ago

THQ so much

0Thank You

Ekta Shekhawat 8 years ago

Learn all name reactions and practice.....

1Thank You

Anurag Yadav 8 years ago

Firstly learn all name reaction and then u will find it easy to solve

1Thank You

ANSWER

What happens when emulsion is subjected to high speed centrifugation???

Posted by Ekta Shekhawat 8 years ago

CBSE > Class 12 > Chemistry

2 answers

Anurag Yadav 8 years ago

The emulsion breaks down upon application of centrifugation. It separates emulsion to its constituent liquids........

1Thank You

Ekta Shekhawat 8 years ago

Plzz answer....

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ANSWER

Why phenol become pink

Posted by Shivam Sood 8 years ago

CBSE > Class 12 > Chemistry

4 answers

Nishikant Kumar 8 years ago

Due to f-centre

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Anurag Yadav 8 years ago

That's why it turns in pink colour

2Thank You

Anurag Yadav 8 years ago

When it comes in exposure to light nd air it forms p-benzoquinone

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Ayushi Tyagi 8 years ago

Due to oxidation with air

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ANSWER

Solid state imp topics?

Posted by Lalit Maan 8 years ago

CBSE > Class 12 > Chemistry

3 answers

Nk Pandey 8 years ago

Numerical prt

1Thank You

Lalit Maan 8 years ago

1Thank You

Ayushi Tyagi 8 years ago

Defects

2Thank You

ANSWER

Alkyl halide is polar & water is also polar yet alkyl halide is not soluble in water . Why?

Posted by Shreedhar Babar 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Ruby Bajwa 8 years ago

Alkyl halide are unable to break or form H bonds with water molecule.

3Thank You

ANSWER

Agr koi do compounds de rkhe h to kse btaenge ki vo raoult's law se positive deviation dikhaenge ya negative.......... Plz ans in simple language

Posted by Ayushi Tyagi 8 years ago

CBSE > Class 12 > Chemistry

4 answers

Anurag Yadav 8 years ago

Where as if there is no interaction at all between solute and solvent then both molecules are in a race to escape from solution and exert vapour pressure. Here there will be more vapour pressure then expected ,hence a positive deviation...... E.g acetone and choloroform

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Ruby Bajwa 8 years ago

Mostly chloroform wale negative deviation show krte h.

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Anurag Yadav 8 years ago

If both compounds are polar then there will be definitely an interaction between them which will result in the suppression of escaping tendency of both compounds and this will lead to less vapour pressure of solution then expected hence negative deviation...... E.g ethanol + water

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Ayushi Tyagi 8 years ago

Koi ans bta do jldi se

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ANSWER

Difference between aphla-helix and beta-pleated structure of protein

Posted by Kanishk Aggarwal 8 years ago

CBSE > Class 12 > Chemistry