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

In alkyl halides, there exist dipole-dipole attractions where as in water van der waal's forces or the hydrogen bonding exists.. It is difficuilt for alkyl halides to break these hydrogen bonds, hence making them almost insoluble in water..

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What happens when cdcl2 is doped with Agcl?

Posted by Dimpy Kaur 7 years, 9 months ago

CBSE > Class 12 > Chemistry

4 answers

Ankur Sardar 4 years, 7 months ago

Please read the question carefully, it is given that CdCl2 is Doped with AgCl not AgCl is doped with CdCl2. This means the impurity here is Ag+ from AgCl not Cd2+. In this case, we can say that it is possible that one Ag+ is occupying lattice site and another is occupying interstitial site. Another possibility which i think is possible is that only one Ag+ will occupy the lattice site and one Chlorine from the CdCl2 lattice will leave. Now this will make the crystal electrically neutral as a crystal should be. Also in this case as one chlorine has left the place, then it can develop electron holes in it as the Ag+ surrounding the Cl- will no longer have it so it may develop an electron hole. By this way it may conduct electricity. I'm not 100% sure also i am doing this question as my assignment now but i didnt got any proper answer.

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Prince Jaat 7 years, 9 months ago

Welcome

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Dimpy Kaur 7 years, 9 months ago

Tysm ?

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Prince Jaat 7 years, 9 months ago

When AgCl is doped with CaCl2 , Some of the sites of Ag+ Ions are occupied by Cd2+ Ions . As charge on Cd is +2 , One Cd+2 ion will replace Two Ag+ Ions. This lattice will have cationic vacancies and number of vacancies are same as the number of Sr2+ Ions. It increases electrical conductance due to vacancies.

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Red phosphorus is less reactive than white phosphorus?

Posted by Dimpy Kaur 7 years, 9 months ago

CBSE > Class 12 > Chemistry

5 answers

Prince Jaat 7 years, 9 months ago

Welcome

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Dimpy Kaur 7 years, 9 months ago

Tysm?

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Aastha Tripathi 7 years, 9 months ago

Bond

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Aastha Tripathi 7 years, 9 months ago

Due to angular strain in white P its bomd angle is 60degree so it is more reactive

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Prince Jaat 7 years, 9 months ago

White phosphorus is made up of discrete P4 tetrahedra which are subjected to very high angular strain as the angles is 60 degrees. Red phosphorus is a polymer of P4 tetrahedra, which has much less angular strain. This high angular strain makes white phosphorus unstable and highly reactive.

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sulphanilic acid is insoluble in water but is soluble both in aqueous bases and aqueous mineral acids taken separately

Posted by Dhruv Kaushik 7 years, 9 months ago

CBSE > Class 12 > Chemistry

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All the best Champs?

Posted by Ishu Chouhan 7 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

J Ranjan Parida 7 years, 9 months ago

Thnks

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Prince Jaat 7 years, 9 months ago

Thanks

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Orthophosphorus is reducing agent and hypophosphorus is non reducing?why?

Posted by Harmanpreet Sidhu 7 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Prince Jaat 7 years, 9 months ago

Obviously H3PO3 is more reducing agent because in H3PO3,P in +3 oxidation state So it can be oxidised to max +5 oxidation state,So it is a good reducing agent. On the other hand in H3PO4 P in +5 oxidation state So it is in max oxidation state So it can not be further oxidised so it can not reduce other so it is not a reducing agent.

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Ishu Chouhan 7 years, 9 months ago

No idea

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Fe(OH)3 sol gets coagulated on adding NaCl solution. Why?

Posted by Sakshi Nema 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Prince Jaat 7 years, 9 months ago

Becoz Fe(OH)3is a positively charged colloid which is coagulated by the addition of NaCl means by the addition of Cl-.

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Carboxylic acids do not give characteristic reaction of carbonyl group ? Why

Posted by Paras Tripathi 7 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Dhruv Kaushik 7 years, 9 months ago

carboxylic acids due to presence of resonance, the C=O group is not a pure carbonyl group & therefore they do not show characteristic reactions of carbonyl group

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Sidharth Verma 7 years, 9 months ago

May be due to presence of hydrogen bonding of OH group on carboxylic acid

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Mechanism of non ionic detergent

Posted by Sidharth Verma 7 years, 9 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Hybridzation of tetraamminecopper 2 ion? Explain

Posted by Minakshi Choudhary 7 years, 9 months ago

CBSE > Class 12 > Chemistry

3 answers

Dhruv Kaushik 7 years, 9 months ago

NH3 only show this behavior with Cu

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Arpita Mahata 7 years, 9 months ago

Yaa... It's dsp2 .... Because of strong field of the approaching ligand (NH3) the one unpaired electron shall move to one of the vacant p orbital and the other 2 p subshell shall accommodate the electrons if ligand

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Prince Jaat 7 years, 9 months ago

I think the hybridization should be dsp2. Let's come to the explanation. The Cu atom is in form of Cu+2 in the compound. In Cu+2, the electronic configuration would be .. 1s22s22p63s23p63d94s0

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Bakelite , polystyrene and isoprene arrange in increasing order of intermolecular forces

Posted by Sidharth Verma 7 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Sidharth Verma 7 years, 9 months ago

Isoprene ,Polystyrene ,Bakelite

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Shefali Mourya 7 years, 9 months ago

I also want to know

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Structure of xef6

Posted by Nakul Bhati 7 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Prince Jaat 7 years, 9 months ago

Hybridization=arounded atoms to central atom+1/2(valence e- of central atom -bonded e- ) SO,hybridization of XeF6=6+1/2(8–6) =6+1 i.e.6+1=(bonded e-) +(lonpair) So,hybridization=7=sp3d3 Its hybridisation is sp3d3 however its geometry is capped or distorted octahedral(square bipyramidal) one and not pentagonal bipyramidal. The flourine atoms occupy the vertices of the octahedron and lone pairs keeps on moving in space to minimise repulsion, and hence distorting the octahedral geometry

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Arpita Mahata 7 years, 9 months ago

SHAPE:Distroted tetrahedral HYBRIDISATION:sp3d3

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How to distinguish between Alcohol and Carboxylic acid? Name the tests used.

Posted by Arpita Mahata 7 years, 9 months ago

CBSE > Class 12 > Chemistry

4 answers

Sidharth Verma 7 years, 9 months ago

Benzene will not give?

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Abhi Aahi 7 years, 9 months ago

Rcooh+nahco3 --->rcoona+h2o+co2

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Sidharth Verma 7 years, 9 months ago

Reaction involved

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Abhi Aahi 7 years, 9 months ago

NaHco3 test

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Important questions of chapter aldehyde,keton n catboxylic acid

Posted by Ananya Jain 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Devansh Dutt 7 years, 9 months ago

Name reactions ?

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Difference between ethane and benzene

Posted by Sidharth Verma 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Ananya Jain 7 years, 9 months ago

Ethane is alkyl whereas benzene is a cyclic ring...both r totally different

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Derive the osmotic pressure

Posted by Arpit Vishwakarma 7 years, 9 months ago

CBSE > Class 12 > Chemistry

0 answers

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Vanderwalls equation

Posted by Aman Raj 7 years, 9 months ago

CBSE > Class 12 > Chemistry

0 answers

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Benzene to benzonitrile and chlorobenzene

Posted by J Ranjan Parida 7 years, 9 months ago

CBSE > Class 12 > Chemistry

3 answers

Prince Jaat 7 years, 9 months ago

Welcome bhai

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J Ranjan Parida 7 years, 9 months ago

Thanks bro..

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Prince Jaat 7 years, 9 months ago

How chlorobenzene obtained from the Benzene? Benzene is reacted with nitrating mixture (h2so4 and hno3) to form nitrobenzene. Then nitrobenzene is reduced by use of Sn and Hcl . It reduces it to aniline. We use that aniline to carry out dizo reaction (where we react it with NaNO2 and Hcl at 0-5 degree) we get benzene diazonium chloride. Benzene diazonium chloride is reacted with HCl and Cu2Cl2 (most of the book have written it as Cucl instead of Cu2Cl2 that is wrong, but for board level I recommend you to use the wrong one ie Cucl as your papers may be checked by teachers who have their knowledge limit only till board books). So coming back to the point when we react benzene diazonium chloride with CuCl and HCl we get chlorobenzene (this particular reaction is called sandmeyer reaction)

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Sir i have not completed my syllbes

Posted by Priya Adil 7 years, 9 months ago

CBSE > Class 12 > Chemistry

2 answers

Prince Jaat 7 years, 9 months ago

Apne kitne syllabus ker liye

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Prince Jaat 7 years, 9 months ago

Yhen per koi Sir nhi hai

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What is schotten baumen reaction

Posted by Samu Dr 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Prince Jaat 7 years, 9 months ago

Schotten–Baumann reaction is a method to produce amides from amines and acid chlorides it is a condensation reaction. example; phenol + benzoylchloride gives phenyl benzoate (ie,benzoylation of phenol

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Conversion of chlorobenzene to benzonitrile

Posted by J Ranjan Parida 7 years, 9 months ago

CBSE > Class 12 > Chemistry

3 answers

Prince Jaat 7 years, 9 months ago

ONE OR TWO NITRILE GROUPS CAN BE INTRODUCED ONTO AROMATIC (CARBOCYCLIC) RINGS BY REACTION BETWEEN HALOGENATED AROMATIC COMPOUNDS (OTHER THAN FLUORINATED), CARBON MONOXIDE AND A METAL CYANATE IN THE PRESENCE OF A NICKELOR PALLADIUM-CONTAINING CATALYST. FOR EXAMPLE, BENZONITRILE CAN BE PREPARED FROM CHLOROBENZENE, SODIUM CYANATE AND CARBON MONOXIDE IN THE PRESENCE OF A NICKEL SALT.

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Parru Kaur Brar 7 years, 9 months ago

???

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Samu Dr 7 years, 9 months ago

Tell this anyone

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Why dipole moment of CH3Br less than CH3Cl

Posted by Samu Dr 7 years, 9 months ago

CBSE > Class 12 > Chemistry

3 answers

Prince Jaat 7 years, 9 months ago

Why

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Samu Dr 7 years, 9 months ago

Incorrect

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Prince Jaat 7 years, 9 months ago

CH3Cl has larger dipole moment than CH3F because dipole moment is based on the product of distance and charge, and not just charge alone. Fluorine is more electronegative than chlorine, but, the carbon-fluorine bond is also much shorter than the carbon-chlorine bond: 139 pm vs 178 pm

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What is Lucas reagent pls reply soon

Posted by Shweta Singh 7 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Prince Jaat 7 years, 9 months ago

Lucas' reagent is a solution of anhydrous zinc chloride in concentrated hydrochloric acid. This solution is used to classify alcohols of low molecular weight. The reaction is a substitution in which the chloride replaces a hydroxyl group.

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Van 't off factor

Posted by Anish Singh 7 years, 9 months ago

CBSE > Class 12 > Chemistry