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What is the unit of rate constnt k ?

Posted by Vishal Singh 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Srilakshmi Ranjith 7 years, 1 month ago

For zero order-mol/L s For 1st order-/s For 2nd order-L/mol s

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Why are flourine more electronegative than chlorine?

Posted by Dishika Arora 7 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Yogita Ingle 7 years, 1 month ago

The electron affinity of an element is the energy given off when a neutral atom in the gas phase gains an extra electron to form a negatively charged ion. A fluorine atom in the gas phase, for example, gives off energy when it gains an electron to form a fluoride ion.
F(g) + e^- -----> F^-(g) deltaHo = -328.0 kJ/mol
The electron cloud of F is more dense than that of Cl because Cl is larger in size. So electrons can't enter in Florine's valence shell because of electrostatic force of rapultion of electro &electron cloud. So, electron affinity of fluorine is comparatively less than chlorine.

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Chhavi Sachdeva 7 years, 1 month ago

May be because of its small size.

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Diazo coupling is used in which chemical tests?

Posted by Snehashish Datta 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Chhavi Sachdeva 7 years, 1 month ago

It is used for the preparation of diazo dyes using C6H5N2+Cl- .

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Solutions,electrochemistry,chemical kinetics has some derivatios also like that of half life nernst equation etc .are those derivations asked in boards or only questions /numericals baaed on those formulas are asked in boards?

Posted by Ayushi Kachhwaha 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Vishal Kumar 7 years, 1 month ago

mostly num. and 1 or 2 maeks ques

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What are the tings to prepare for 65+ out of 70

Posted by Hanu Saini 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Vishal Singh 7 years, 1 month ago

Study chemistry......

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How many element present in perodic table

Posted by Shubham Singh 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Abhishek Anjan 7 years, 1 month ago

118 element

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Write the reason for the stability of colidal sols.

Posted by Abhishek Anjan 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Muskan Saxena 7 years, 1 month ago

Due to charge on colloidal particle and brownion movement

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what is muta rotation

Posted by Mehak Bhardwaj 7 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Sameer Khan 7 years, 1 month ago

When either two forms of glucose dissolved in water ,a change in specific rotation occur which is known as Muta rotation. Muta means "change".

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Hanu Saini 7 years, 1 month ago

When d and l are in equilibrium

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What is α-helix Structure?

Posted by Utkarsh Vishwakarama 7 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Vishal Singh 7 years, 1 month ago

A-hexalic has intramolecular hydrogen bonding .

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Gaurav Seth 7 years, 1 month ago

α-Helical structure: In α-Helix structure, a polypeptide chain forms all possible hydrogen bonds by twisting into a helix with -NH group of each amino acid residue and hydrogen bonded to >C=O of an adjacent turn of the helix.

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is ethanol-acetone an ideal or non-ideal solution

Posted by Sks Gamerking 7 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Suhani Rana? 7 years, 1 month ago

Non ideal showing positive deviation

1Thank You

Himanshu Upadhyay 7 years, 1 month ago

Non ideal

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5 marks questions kaha se aayenge?? Koi jaldi batao

Posted by Anjali Anjali 7 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Dev Pratap Singh 7 years, 1 month ago

Aldehyde & Ketones ,d & f block & (Solutions or Electrochemistry)

3Thank You

Yash Ojha 7 years, 1 month ago

Jada tar d and f blocks seh aateh hai

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Improvement kitnee baar de sakte hai

Posted by Raghav Thakur 7 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Dev Pratap Singh 7 years, 1 month ago

1 bar or result me bhi mention ho jaega with compartment

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Himanshu Upadhyay 7 years, 1 month ago

3 bar

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Important reaction from organic chemestry class 12

Posted by Shivam Jaiswal 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Pooja Bhatia 7 years, 1 month ago

All name rxns are important . You can watch a video of anirudh walia on unacademy he has discussed all the bame rxns

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Organic chemestry kaise kare

Posted by Shivam Jaiswal 7 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Muskan Saxena 7 years, 1 month ago

You have to learn all naming rxn and distinguish test + conversion or bhagwan ka name lekar roj revise kro?

1Thank You

Dev Pratap Singh 7 years, 1 month ago

Practice atleast 10 times

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Electrolysis pross

Posted by Richa Singh 7 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Why conductivity decreases with dilution

Posted by Ritik Saini 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Snehashish Datta 7 years, 1 month ago

On dilution concentration decreases, so number of ions per unit volume also decreases. Therefore conductivity decreases.

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What is Molal conductivity

Posted by Sumit Yadav 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Himanshu Upadhyay 7 years, 1 month ago

Kappa×1000/C

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What is the blue print for board 2019???

Posted by Ayush Singh 7 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Why the solutions of intext questions not given in this app?

Posted by Asmita Khati 7 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Ayush Kumar Behera 7 years, 1 month ago

Use app "class 12 chemistry ncert solutions" in playstore... Offline app

0Thank You

Dev Pratap Singh 7 years, 1 month ago

Use Vedantu for more precise things

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Why glass is a pseudo solid

Posted by Swati Agarwal 7 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Anirban Biswas 7 years, 1 month ago

1Thank You

Shivam Jaiswal 7 years, 1 month ago

Because it has ability to flow

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Aluminum crystallizes in a face centred cubic close-packed structure its atomic radius is (a) What is the length of the edge of the unit cell? (b) How many such unit cells are there in a 1.00 m piece of aluminium? [3]

Posted by Suhani Dash 7 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Is i prefer ncert back questions in last 6 days to score 90 marks?

Posted by Saksham Shrivastava 7 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Abhishek Singh 7 years, 1 month ago

yes offcourse mostly the paper is comes from the ncert and the example most important. so pay attention toward the exampler question..

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Vishal Gupta 7 years, 1 month ago

Yes offcorse

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How I prepare my litreture section of hindi core?

Posted by Bipanshu Kumar Bharti 7 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What type of stoichiometric defect is shown by agbr or agl

Posted by Vicky Manhotra 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Shivam Jha 7 years, 1 month ago

AgBr shows both frenkel and schotky defect

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Chapter wise marks distribution of chemistry

Posted by Abeer Ahmad 5 years, 11 months ago

CBSE > Class 12 > Chemistry

2 answers

Tanmay Garg 7 years, 1 month ago

There it is not writen for each chapter

0Thank You

Amit Kumar 7 years, 1 month ago

Watch from cbse syllabus

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Co-ordination compound important questions

Posted by Shubham Dhawan 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Shivam Jha 7 years, 1 month ago

Isomerism hybridization and nomenclature

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Allyl chloride can be distinguished fron vinyl chloride by NaOH and silver nitrate test .comment

Posted by Nidhish Yadav 7 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Shivam Jaiswal 7 years, 1 month ago

Organoc chemestry kaose karu

0Thank You

Sanskriti S 7 years, 1 month ago

reaction of allyl chloride with NaOH to give alcohol nd NaCl is nucleophilic substn. reac. NaCl produced gives white ppt. of NaNO3 on reacn. with silver nitrate whereas vinyl chloride doesn't undergo nucleophilic subs. reacn. due to 'double bond character' in C-Cl bond(resonance).

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Common name of ch2cl2 should be methyllidene chloride not methlene chloride because it is a geminal dihalide

Posted by Sonam Malik 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Sanskriti S 7 years, 1 month ago

when both func. group(-Cl) are present on same carbon, it is called geminal dihalide nd is named as methylidene chloride. Nd when it is attached to diff. C, it is called vic dihalide nd is named as methylene chloride

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ANSWER

Can anyone tell all the reactions known by the names of scietists eg Fredel crafts reaction

Posted by Harsha Phansalkar 7 years, 1 month ago

CBSE > Class 12 > Chemistry