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

β-amino-carbonyl compound....... K/d mannic base..... is the product.... fir comp. reacn ?https://en.m.wikipedia.org/wiki/File:Mannich_Reaction_V.1.png ?

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Ayush Parija 7 years, 2 months ago

Sorry mannich reaction

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how will you convert benzene to diphenyl

Posted by Sourabh Pandram 7 years, 2 months ago

CBSE > Class 12 > Chemistry

2 answers

Ayush Parija 7 years, 2 months ago

To give diphenyl

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Ayush Parija 7 years, 2 months ago

Benzene on reaction with cl2 in presence of fecl3 give chlorobenzene and then na dry ether fitting reaction

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Why haloarenes are less reactive than haloalkanes towards nucleophilic substitution reaction

Posted by Yamini Chouhan 5 years, 8 months ago

CBSE > Class 12 > Chemistry

3 answers

Karan Kumar 7 years, 2 months ago

????????

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G K 7 years, 2 months ago

????

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Ayush Parija 7 years, 2 months ago

Haloarene less reactive than haloalkane because in haloarene the lone pair of halogen is involved in resonance with benzene ring due to which partial double character is formed and sn1 reaction is not possible due to unstable phenyl cation

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What is Mechanism of Sn1 reaction ?

Posted by Sarthak Kasaudhan 7 years, 2 months ago

CBSE > Class 12 > Chemistry

2 answers

G K 7 years, 2 months ago

So many thumbsup to u Aayush????.... U have plenty of knowledge..??.......

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Ayush Parija 7 years, 2 months ago

Sn1 reaction proceed in two step.first is the formation of carbocation then attack of nucleophile.sn 1 reaction generally occur in polar protic solvent such as water ethanol.rate of sn1 dpends on leaving group.rate of sn reaction directly proportinal to good leaving group.good leaving means weak conjugate base .for sn1 reaction weak nucleophile is required.rate of sn1 directly proportional to stability of carbocation.sn1 is not possible foe bridged compound because carbocation formed as intermediate .carbocation is planar which is not achieveable upto 10 carbon atom in bridged compound.three membered ring does not give sn1 reaction due to angke strain. Nature of substrate must be tetiary for good sn1 reaction .other factor such as carbocation stabilitybalso determine the rate of sn1. Follows first order kinetics.rate directly proportional to concentration of alkyl halide.conc of nucleophile does not affect the rate of sn1 .rate of sn1 reaction involve weak nucleophile .nucleophilicty order can be determined charge density or polarization of electron cloud .

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Difference between phenol and benzoic acid

Posted by Nitin Prakash 7 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

G K 7 years, 2 months ago

Benzene pe OH gp - phenol,..... and COOH gp - benzoic acid.......

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Why in fcc, atoms donot touch each other at ends, prove it

Posted by Rishabh Pandey 7 years, 2 months ago

CBSE > Class 12 > Chemistry

2 answers

Karan Kumar 7 years, 2 months ago

???

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Pranjal Sehrawat 7 years, 2 months ago

Ghanta

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Can i get compartement help papers ?

Posted by Mansi Shukla 7 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

#Arya # 7 years, 2 months ago

yes, you can download it from cbse.nic.in

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H3po2 ki reducing property btao koi with a reaction

Posted by Tarun Goswami 7 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Astha Sharma 7 years, 2 months ago

It will give H3po3

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Crystilline solid

Posted by Apoorv Srivastava 7 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Tarun Goswami 7 years, 2 months ago

Solids having short range order and irregularly arrengment of condtituent particles

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What is diastereomers?

Posted by Shivanshu Kulshrestha 7 years, 2 months ago

CBSE > Class 12 > Chemistry

0 answers

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Molecular mass of NACL determined by osmotic pressure measurement is found to be half of the actual value.account for it

Posted by Aastha Sharma 7 years, 2 months ago

CBSE > Class 12 > Chemistry

0 answers

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Why do we get abnormal molar mass from colligative properties?

Posted by Aastha Sharma 7 years, 2 months ago

CBSE > Class 12 > Chemistry

0 answers

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What is the work of H3PO4

Posted by Adnan Saleem 7 years, 2 months ago

CBSE > Class 12 > Chemistry

3 answers

G K 7 years, 2 months ago

Thnx bro...

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Himanshu❤ Bachish✌ 7 years, 2 months ago

Ehehehh...wow!! How deap u study ..aswm ✌

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G K 7 years, 2 months ago

It works with Ca to form strong bones and teeth?.......It also helps support kidney function..... nd the way ur body uses and stores energy.........

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What is mild oxidising agent?

Posted by Nandjee Rai 7 years, 2 months ago

CBSE > Class 12 > Chemistry

2 answers

Shivanshu Kulshrestha 7 years, 2 months ago

Mild oxidising agents are those which do not completely oxidise the alcohol to carboxylic acids.but stop the r*n at ketone only.

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G K 7 years, 2 months ago

Primary or secondary alcohol - - - - > ketone - - - - > carboxylic acid........ye oxidn r*n h..... agr hme yr r*n ketone per stop krni h then we use mild oxidising agents....... e. g. PCC....

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What type of propery is the browian movement of colloidal sol.

Posted by Srijan Koundal 7 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Deepak Pandey 7 years, 2 months ago

Mechanical property

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Why Nitrogen doesn't formed Pentahalides?

Posted by Arti Vishwakarma 7 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Minaxi Bishnoi 7 years, 2 months ago

Nitrogen have one s and three p orbitals only. So , nitrogen does not form pentahalide due to absence of d orbitals.

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Why selenium do not have lone pair ?

Posted by Anamika Anamika 7 years, 2 months ago

CBSE > Class 12 > Chemistry

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How do we convert cast iron into wrought iron?

Posted by Ashu Kr 7 years, 2 months ago

CBSE > Class 12 > Chemistry

0 answers

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Equal masses of chlorine and nitrogen are mixed in a container at 29 °C and 1 atm. The partial pressure of chlorine gas is closest to

Posted by Gulzar Begum 7 years, 2 months ago

CBSE > Class 12 > Chemistry

0 answers

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Define abnormal molar mass

Posted by Divyanshu Upadhyay 7 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 7 years, 2 months ago

Molecular masses of the solute can be easily determined with the help of colligative properties; relative lowering in vapour pressure, boiling point elevation, freezing point depression, and osmotic pressure easily. But, we derived the relation between the molecular mass of solute and colligative properties under some assumptions, which are:

The solution is diluted that is, solvent is available in large amount in order to obey Raoult’s Law
The solute neither went dissociation or association in the solution

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Why O2 is paramagnetic in nature

Posted by Aditya Sharma 7 years, 2 months ago

CBSE > Class 12 > Chemistry

2 answers

Saurabh Suman 7 years, 2 months ago

Paramagnetic nature of oxyge

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Ayush Parija 7 years, 2 months ago

Paramagnetic nature of oxygen can be explained by molecular orbital theory.i f you write the mo configuration of oxygen you will see that 2 unpaired electron pi abmo which gives it paramagnestism

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What is observed when electric current is passed through the colloidal solution?

Posted by Kalika Singh 7 years, 2 months ago

CBSE > Class 12 > Chemistry