Incorrect URL accessed!!!!

Anushree Agarwal 5 years, 9 months ago

CH3CH(Cl)CH(CH3)CH2CH3

Tapan Pandey?? 5 years, 9 months ago

ANSWER

Classification of polymers is not in the syllabus ?

Posted by Anushree Agarwal 5 years, 9 months ago

CBSE > Class 12 > Chemistry

4 answers

Varsha Tripathy 5 years, 9 months ago

It is there

Tapan Pandey?? 5 years, 9 months ago

It is!!!!!!!!!!!

Manjay Jha 5 years, 9 months ago

Noooo from copolymerisation is coming

Yashika Gulati 5 years, 9 months ago

It is...

ANSWER

What is natural polymer

Posted by Shivam Basti 5 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Tapan Pandey?? 5 years, 9 months ago

Yogita Ingle 5 years, 9 months ago

Natural polymers: The polymers which are obtained naturally are called natural polymers. A natural polymer has its origin in plants and animals. Starch, cellulose, proteins, natural rubber etc. are the examples of natural polymers.

ANSWER

Kitno ki tyari ho gyi ?

Posted by Varsha Tripathy 5 years, 9 months ago

CBSE > Class 12 > Chemistry

8 answers

Tapan Pandey?? 5 years, 9 months ago

Ni yrr...... physics ke baad sb nill lg rha h.......I don't have words to express my paper

Tamanna Sharma 5 years, 9 months ago

Tapan, you are also very fast

Tapan Pandey?? 5 years, 9 months ago

Tapan Pandey?? 5 years, 9 months ago

Tez ho sab

Ďãřşháñăã Yadav ? ? ? 5 years, 9 months ago

???yahi nhi ho rahi yrr.

Meghna Shrivastav? 5 years, 9 months ago

Me too

Manjay Jha 5 years, 9 months ago

Meeeeeee

Tamanna Sharma 5 years, 9 months ago

ANSWER

Which equation will help to find i(van't off factor) when dissociation constant is given..?

Posted by Arsh Pandher 5 years, 9 months ago

CBSE > Class 12 > Chemistry

3 answers

Tapan Pandey?? 5 years, 9 months ago

?✍️✍️✍️✍️

Ritss ?? 5 years, 9 months ago

First find degree of dissociation K=C( degree of dissociation)^2/1-(degree of dissociation) Then from the value of degree of dissociation u can find i value degree of dissociation= i-1/n-1

Pushkar Gupta 5 years, 9 months ago

To find the value of i

ANSWER

can Gatterman-koch rxn be considered similar to friedel crafts acylation? Discus.

Posted by Ďãřşháñăã Yadav ? ? ? 5 years, 9 months ago

CBSE > Class 12 > Chemistry

5 answers

Ďãřşháñăã Yadav ? ? ? 5 years, 9 months ago

tujh mein dimag he kaha hai ??? khali mala hai tera toh. ???

Řøhăň Řąjpůť ✌️✊ 5 years, 9 months ago

arrey ye toh dimag mein aaya he nhi. ???

Ďãřşháñăã Yadav ? ? ? 5 years, 9 months ago

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Řøhăň Řąjpůť ✌️✊ 5 years, 9 months ago

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Řøhăň Řąjpůť ✌️✊ 5 years, 9 months ago

???howz the Josh ????.. Yes Gatterman-koch rxn can be considered similar to the friedel craft acylation. The reason being that in FC acylation benzene is treated with an acid chloride in presence of anhydrous AlCl3 since HCoCL is not stable, therefore in Gatterman-koch rxn, it is prepared in situ by rxn Co with Hcl gas in presence of anhydrous AlCl3 thus Gatterman-koch rxn is similar to FC acylation rxn.

ANSWER

What to study in p-block elements? Plz anyone tell immediately...

Posted by Upasana Bastia 5 years, 9 months ago

CBSE > Class 12 > Chemistry

3 answers

Tapan Pandey?? 5 years, 9 months ago

In-text and excercise questions.....

Upasana Bastia 5 years, 9 months ago

Thnqq...

Sulekha Singh 5 years, 9 months ago

Group 13 to group 18 elements briefly

ANSWER

Elevation in boiling point.?

Posted by Nawab Shaykh 5 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Tapan Pandey?? 5 years, 9 months ago

T= kb*m

Kartik Tyagi 5 years, 9 months ago

When we dissolve volatile solute in solvent liquid and vapour phase comes in equilibrium then vapour pressure decreases boiling poit increases this process is known as elavation in BP

ANSWER

What to study in d and f-block elements? Importants plz anyone tell...

Posted by Upasana Bastia 5 years, 9 months ago

CBSE > Class 12 > Chemistry

4 answers

Abhishek Dubey 5 years, 9 months ago

Ncert

Tamanna Sharma 5 years, 9 months ago

Do only previous year

Upasana Bastia 5 years, 9 months ago

Thnq...

Kartik Tyagi 5 years, 9 months ago

Preparation of K2Cr2O7 or KMnao4 lanthanide or acitinaid contraction

ANSWER

Define activation energy (Ea.)

Posted by Nawab Shaykh 5 years, 9 months ago

CBSE > Class 12 > Chemistry

3 answers

Meghna Shrivastav? 5 years, 9 months ago

The energy difference between activated complex molecule and reactant molecule is called activation energy. And the total energy of activated complex molecule molecule is called thershhold energy.

Sulekha Singh 5 years, 9 months ago

The energy needed to form activated complex or intermediate is called activation energy

Kartik Tyagi 5 years, 9 months ago

Energy which is just to start the reaction means energy required other than a reaction have energy

ANSWER

What is van't hoff factor?

Posted by Nawab Shaykh 5 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Meghna Shrivastav? 5 years, 9 months ago

The ratio of normal molecular mass to observed molecular mass

Anushree Agarwal 5 years, 9 months ago

It is the ratio of normal molar mass to the observed molar mass.

ANSWER

Why SO2 is a gas and SeO2 is solid ????? Please aannsswweerrrrr.

Posted by Armaan Gur_Jar 5 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Armaan Gur_Jar 5 years, 9 months ago

Thanks Yogita

Yogita Ingle 5 years, 9 months ago

SO₂ is a gas whereas SeO₂ is solid. This is because SeO₂ has a chain polymeric structure consisting of alternate selenium and oxygen atoms. This one dimensional chain forms strong interactions thus it exists as solid. Whereas SO₂ is molecular and no such strong interactions is present between them. It forms discrete units. Thus it exists as gas.

ANSWER

Hii cbse guide. Com i just ask to one question that I follow this site I got 95 percent in board exam

Posted by Sachin Rajput 5 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Armaan Gur_Jar 5 years, 9 months ago

Of course dear ????

ANSWER

Why carboxylic acid has higher boiling point than alcohol

Posted by Sunita Kunwar 5 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Akhil Kumar 5 years, 9 months ago

All carboxylic acids have higher boiling pt. than alcohols.

Yogita Ingle 5 years, 9 months ago

Carboxylic acids have higher boiling point than alcohols due to more extensive association of carboxylic acid molecules through intermolecular hydrogen bonding. The hydrogen bonds are not broken completely even in the vapour phase. Hence carboxylic acids have higher boiling points than alcohols.

ANSWER

How to distinguish b/w sn1 and sn2 mechanisms

Posted by Prem Chandra Maurya 5 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Tamanna Sharma 5 years, 9 months ago

Conversion aur inversion product ki amount compare karke

ANSWER

What is chelate ?

Posted by Ankit Singh 5 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Kriti Sharma 5 years, 9 months ago

Actually ......it is a ring like structure which is formed when when two or more ligands donate electron pair to the central metal atom in coordination compound..... the compounds showing chilate effect are more stable than other compounds due to the ring like structure...?

Shefu ??????? 5 years, 9 months ago

Having more than one donating atom and occur most of time in ring form so called chelate

ANSWER

yaar dostoon Koi mujhe chemistry in everyday life ki imp tropic bata de ..

Posted by Ahmad Kashan Zain 5 years, 9 months ago

CBSE > Class 12 > Chemistry

3 answers

Meghna Shrivastav? 5 years, 9 months ago

No its Anionic

Ahmad Kashan Zain 5 years, 9 months ago

waise kriti ji mujhe lagta hai aap ka chemistry full tayyar hai .mujhse kuch imp question puchen.?☺

Kriti Sharma 5 years, 9 months ago

It is a fairly easy chapter..... what you need to remember is about the types of drugs,,, that is analgesics ...........under which comes non narcotic drugs which are the drugs which are ...non addictive ....and ....narcotic drugs which are..... addictive tranqulizers. which are used to relieve anxiety stress ,irritability ,, and antihistamines.... antimicrobial drugs in which comes on...... antiseptics and disinfectants......... antibiotics ......antifertility drugs............ artificial sweetening agents like saccharin sugar used for diabetic persons aspertame limited to cold foods only alitame. which is the high potency sweetener ...........sucralose derivative of sucrose .................you need to know about detergents as I have seen from the last years lot of questions have came from types of detergents,,,,, that is an... ionic detergents .....which are sodium salt of sulphonated long chain alcohols and ........cationic detergents which are......... quaternary ammonium salts of amines....... and .......non ionic detergents which are neutral that do not contain any ion. you must know about sleeping pills......... learn the cleansing action of soap.......... ?

7Thank You

ANSWER

chemistry me kon kon se topics hat gye h

Posted by Ishika Soni 5 years, 9 months ago

CBSE > Class 12 > Chemistry

3 answers

Nishant Kumar 5 years, 9 months ago

Nd polymer bhi to ! copolymerisation se aa rha h

Ahmad Kashan Zain 5 years, 9 months ago

solid state

Ritwik Choudhary 5 years, 9 months ago

Nitrogen family n solid state

ANSWER

define column chromatography!

Posted by Nishant Kumar 5 years, 9 months ago

CBSE > Class 12 > Chemistry

4 answers

Nishant Kumar 5 years, 9 months ago

rohit ? wht ?

Nishant Kumar 5 years, 9 months ago

thnks ! kriti

Kriti Sharma 5 years, 9 months ago

In column chromatography and absorption of solutes of a solution through a stationary phase occurs and the solute separates from the mixture into individual components this is based upon affinity towards mobile phase and stationary phase?

Rohit Kumar 5 years, 9 months ago

What is good name?

ANSWER

How would you account for the increasing oxidising power of 3d series??

Posted by Ankan Rastogi 5 years, 9 months ago

CBSE > Class 12 > Chemistry

3 answers

Nishant Kumar 5 years, 9 months ago

table s hi sb ho jaega bhai

Ankan Rastogi 5 years, 9 months ago

Reason??

Nishant Kumar 5 years, 9 months ago

table ratt ll

ANSWER

Is it necessary to explain the terms in formulas? While doing numericals.

Posted by Shivam Garg 5 years, 9 months ago

CBSE > Class 12 > Chemistry

3 answers

Kriti Sharma 5 years, 9 months ago

No it is not important to explain the terms in formulas........... it will be a waste of time time in your exam........ just write down the formulas. correctly?

Shivam Garg 5 years, 9 months ago

Ok thanks ??

Amrit Amrit 5 years, 9 months ago

Not necessary. But, you should solve by writing the given information (with formula symbols) so, examinner can understand

ANSWER

What is the use of Depersent in froth flotation ?

Posted by Amrit Amrit 5 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Kriti Sharma 5 years, 9 months ago

Depressants. ------are the chemical substances which selectively prevent certain type of substances from coming into froth for example and NacN is used as a depressant in zns and PbS it forms a complex with zinc sulphide so that it cannot come in the froth with pbs?

Shivam Garg 5 years, 9 months ago

In case of mixture of two sulphide ores , a depresent is added that prevent one of the sulphide ore to form froath

ANSWER

How henry's law and Roults law related to each other?

Posted by Amrit Amrit 5 years, 9 months ago

CBSE > Class 12 > Chemistry

4 answers

Kriti Sharma 5 years, 9 months ago

Raoults law and Henry's law has been identical except that there proportionality constant are different ......it is equal to Po...for raoults law and kh..for Henry's law therefore raoults law become a special case of henry law in which KH become equal to the vapour pressure of pure component....?

Neha Choudhary 5 years, 9 months ago

Raults s law is a special case of henry law it obey henry law when any one component exist in volatile state at room temp

Riya Rana 5 years, 9 months ago

Raults law is a special case of henrys law when kh=p since both of them depend upon X (mole fraction) directly.

Shivam Garg 5 years, 9 months ago

When the value of p° becomes equal to KH

ANSWER

Anyone up??

Posted by Ankan Rastogi 5 years, 9 months ago

CBSE > Class 12 > Chemistry

3 answers

Ankan Rastogi 5 years, 9 months ago

Okay

Lakshya ? 5 years, 9 months ago

Bolliye

Manjay Jha 5 years, 9 months ago

Boliye

ANSWER

Preparation ho gya

Posted by Shalini Singh 5 years, 9 months ago

CBSE > Class 12 > Chemistry

10 answers

Shalini Singh 5 years, 9 months ago

Ho gyi....done

Tamanna Sharma 5 years, 9 months ago

Ahmad Kashan Zain 5 years, 9 months ago

aap ki hui preparation

Ahmad Kashan Zain 5 years, 9 months ago

mujhe part 1 revision karna hai

Ayush Verma 5 years, 9 months ago

Its completed☺️☺️

Ankan Rastogi 5 years, 9 months ago

Going on...

Nishant Kumar 5 years, 9 months ago

yep! bio molecules and metallurgy bcha hh bs

Lakshya ? 5 years, 9 months ago

Nope

Manjay Jha 5 years, 9 months ago

Part 2 ke starting 4 chp ka tension h baki is done!

Rajput Boy 5 years, 9 months ago

Nahi

ANSWER

What is antihintamine

Posted by Pushkar Gupta 5 years, 9 months ago

CBSE > Class 12 > Chemistry

3 answers

Riya Rana 5 years, 9 months ago

Antihistamines are the type of drugs that are used to prevent the binding of the histamines on the receptor located on the stomach wall which lowers down the production of acid and hence prevents acidity. Eg.. rantidine, seldone, cimetidine.

Manjay Jha 5 years, 9 months ago

For*

Manjay Jha 5 years, 9 months ago

It is a drug that is used dor the treatment of hypersensitivity or allergies.

ANSWER

Polymer syllabus for 2019-20

Posted by Himanshu K 5 years, 9 months ago

CBSE > Class 12 > Chemistry

3 answers

Kriti Sharma 5 years, 9 months ago

From polymers...... you must know that Polymers are very high molecular mass substances ......and process of formation of polymers known as polymerization....... two types of polymerization...... addition ......condensation....... based on molecular forces they are divided as elastomers .....fibres....... thermoplastic and thermosetting...... you must know the difference between thermoplastic and thermosetting polymers..... one of the most important is ...free radical mechanism ....and structure of polythene ......natural rubber..... polypropene .....polystyrene .....polyvinyl chloride ....Teflon .....nylon 66 ....nylon 6 .....dacron .....bakelite .....glyptal..... urea formaldehyde resin .....biodegradable polymers .......you should know about all the monomeric units of the following Polymers for example the monomeric units .....of nylon 66 are hexa methyl diamine and adipic acid..... nylon 6 is caprolactam .....dacron is ethylene glycol and telepathlic acid..... bakelite is phenol and formaldehyde..... glyptal is ethylene glycol and pathalic acid......?

Nishant Kumar 5 years, 9 months ago

shruti jha...are topics bfore Co polymerisation hv been removed?

Manjay Jha 5 years, 9 months ago

From copolymerisation. You can check it from mycbseguide.com itself!