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Schimidt rxn?

Posted by Harshit Bajpai 6 years, 5 months ago

CBSE > Class 12 > Chemistry

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What is the concentration in gram per litre at 2atm pressure and 27°C??

Posted by Rakesh Rana 6 years, 5 months ago

CBSE > Class 12 > Chemistry

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An acquous solution of 2% of non volatile solute exerts a pressure of 1.004 bar at the normal boiling point of the solvent . What is molecular mass of solute.

Posted by Renu Baswal 6 years, 5 months ago

CBSE > Class 12 > Chemistry

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Two beakers are placed side by side in a sealed encloser. The first beaker cobtains 100 mL of pure water, the other, an equal volume of an aqueous solution of sugar. What would be the volumes of the liquids in the two beakers when all physical changes stop, that is, when the equilibrium is reached ?

Posted by Chahat Tailor 6 years, 5 months ago

CBSE > Class 12 > Chemistry

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Why SeO is not formed

Posted by Chanya Sardana 6 years, 5 months ago

CBSE > Class 12 > Chemistry

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What is the name of the method which is used to prepare sulphur sol ?

Posted by Rahul_ Ry(ʘ‿ʘ) 6 years, 5 months ago

CBSE > Class 12 > Chemistry

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n - butyl chloride

Posted by Jaskaran Singh 6 years, 5 months ago

CBSE > Class 12 > Chemistry

2 answers

Pankaj Kumar 6 years, 5 months ago

No above explanation is wrong. n butyl chloride is the name in common nomenclature. And 1 chloro butane is iupac and n would not be there. But condensed formula is correct

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Soumya Kumari 6 years, 5 months ago

Its not n butyl chloride. It would be n clorobutane whose condensed formula is CH3-CH2-CH2-CH2-Cl

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Why is ether not miscible in water??

Posted by Mahadev Baraiya 6 years, 5 months ago

CBSE > Class 12 > Chemistry

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Sia ? 6 years, 5 months ago

Ether is not miscible in water because it cannot form H-bonds with water. However lower members of ethers are soluble in water. The solubility of ethers decreases from lower members to higher members due to increase in size of alkyl group which decreases the formation of hydrogen bonds with water.

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Define integrated rate equation

Posted by Meghna Shrivastav? 6 years, 5 months ago

CBSE > Class 12 > Chemistry

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Aastha Saxena 6 years, 5 months ago

concentration dependence on rate in form of equations for first , second and third order..are called integrated rate equations

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Sia ? 6 years, 5 months ago

Use of integrated rate equation:

The value of rate constant can be known when concentration of reactant at different times are known.
Order of a reaction can be determined by the knowledge of reaction concentration at different times.

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Ketone A undergoes Iodoform reaction to give a compound B on reduction. B on heating with H2SO4 gives C which forms an ozonide D. D on hydrolysis in the presence of zinc gives two molecules of acetaldehyde .Identify A,B,C,D and write the reactions involved

Posted by Rose Thomas 6 years, 5 months ago

CBSE > Class 12 > Chemistry

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What is meso compound?

Posted by Alok Kumar Shah 6 years, 5 months ago

CBSE > Class 12 > Chemistry

2 answers

Bank Of Baroda 6 years, 5 months ago

Meso =having. Pos. And. Cos. And. Superimposable. To. Mirror. Image.( Simple. Answer

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Yogita Ingle 6 years, 5 months ago

A meso compound contains at least two stereogenic centers, yet the molecule itself is not chiral. This is because meso compounds contain an internal plane of symmetry; the molecule can be split by an imaginary mirror so that all atoms on one side of the mirror are the exact reflection of the atoms on the other side. This can be seen below for cis-1,2-dimethylcyclopentane; there are two chiral centers in the molecule since the two carbons labeled with the red asterisk are each bonded to four different groups. A mirror placed through the molecule, along the plane indicated by the dashed line, will exactly bisect the molecule with all groups exactly reflected by their counterparts on the other side of the "mirror".

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Chlorobenzene is extremely less reactive toward a nucleophilic substution reaction. Give two reason for the same.

Posted by Alok Kumar Shah 6 years, 5 months ago

CBSE > Class 12 > Chemistry

2 answers

Athira Ssunil 6 years, 5 months ago

Due to 1. Resonance effect 2. Hybridisation 3. Electron-electron repulsion 4. Instabilty of cation

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Kajal Sanwal 6 years, 5 months ago

1. Due resonance it arrived the partial double on chlorine 2. As benzene ring is -vely charge so it does not allow the nuclear to attack on the chlorobenzene 3. Due to sp2 hybridization of carbon

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Why Grignard's reagent should be prepared under anhydrous condition?

Posted by Alok Kumar Shah 6 years, 5 months ago

CBSE > Class 12 > Chemistry

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Why alkyl halide immiscible with water?

Posted by Alok Kumar Shah 6 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Sia ? 6 years, 5 months ago

To be miscible with water, the solute-water force of attraction must be stronger than the solute-solute and water-water forces of attraction. Alkyl halides are polar molecules and so held together by dipole-dipole interactions. Similarly, strong H-bonds exist between the water molecules. The new force of attraction between the alkyl halides and water molecules is weaker than the alkyl halide-alkyl halide and water-water forces of attraction. Hence, alkyl halides (though polar) are immiscible with water.

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What happen when ethyl chloride is treated with aqueous KOH??

Posted by Alok Kumar Shah 6 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Ramakant Kushwaha 6 years, 5 months ago

Ethyl alcohol and KCl is formed as product

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What is lanthanoid contraction ?

Posted by Hemant Tiwari 6 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Gursharn Kaur 6 years, 5 months ago

Lanthanoid contraction is the decrease in size of lanthanoids. REASON: reason for this is that when we move from left to right in lanthwnoid series the atomic no. increases by 1 in each element. The atoms are added in same principle shell so nuclear charLl yu increases. Due to which the atomic and ionic radii decreases.

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I am suffer problem in join test series.....how i can join......please tell me

Posted by Atul Utsav 6 years, 5 months ago

CBSE > Class 12 > Chemistry

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Sia ? 6 years, 5 months ago

You need to go to 'Test Series' on mycbseguide app/dashboard.

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What is tindel effect

Posted by Xahil Badwal 6 years, 5 months ago

CBSE > Class 12 > Chemistry

2 answers

Meghna Shrivastav? 6 years, 5 months ago

When beam of light is passed through a colloidal solution and viewed perpendicular to the path of incident light the path of beam is illuminated by a bluish light this phenomenon is called tyndall effect

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Dàñïyã Ãrshãd? 6 years, 5 months ago

Tyndall effect:When a beam of light is paased through a colloidal solution , it gets scattered and the path of light becomes visible.This is known as Tyndall effect

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Give an example of positive colloid. Thank you!

Posted by Pratikshit Shubham 6 years, 5 months ago

CBSE > Class 12 > Chemistry

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K@Łp@N@ $Øđh!?? 6 years, 5 months ago

Fe(OH)3, Cr(OH)3 and Al(OH)3 etc.

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Ramakant Kushwaha 6 years, 5 months ago

Al(OH)3

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Manganese (z=25) as it atam has the maximum number of unpaired electrons

Posted by Murtuja Ansari Aatif Alam 6 years, 5 months ago

CBSE > Class 12 > Chemistry

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When 1.5g of non-volatile solute was dissolved in 90g of benzene, the boiling point of benzene raised from 353.23K-353.93K. calculate the molar mass of the solute.(kb for benzene=2.52kg/mol)

Posted by Furrukh Shaaz 6 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Anushka Tripathi 4 years, 9 months ago

ΔT b =353.93K−353.23K=0.7K Substituting W B =1.5g,W A =90g,ΔT b =0.7K,K b =2.52Kkgmol −1 in the expression M B = ΔT b ×W A K b ×W B ×1000 , we get M B = 0.7K×90g 2.52Kkgmol −1 ×1.5g×1000gkg −1 M B =60gmol −1

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All formula off chapter 2 solution

Posted by Arpan Tomer 6 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Ɽøⱨł₮ ₲Ʉ₱₮₳ 6 years, 5 months ago

From chemistry formula app we get

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Why lithium is stored in pyridine wht's the reason behind it

Posted by Moksha Maheta 6 years, 5 months ago

CBSE > Class 12 > Chemistry

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Sia ? 6 years, 5 months ago

Lithium has smaller size and therefore, high polarizing power. Therefore, lithium compounds has covalent character which is responsible for their solubility in pyridine (non-polar solvent).

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How can we check solubility if different alkali chains are present having same atomic mass just different strucutre also please comment on dipole moment of such compounds ???????

Posted by Moksha Maheta 6 years, 5 months ago

CBSE > Class 12 > Chemistry

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How to identify weather a closed compound is aromatic or not aromatic ?

Posted by Soumya Kumari 6 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Rajat Barwar 6 years, 5 months ago

Oh I have answered a similar ques. some days ago. Ok,it is decided by huckle's rule. Huckle's rule:- 1)compound should be cyclic planar. 2)It should have the complete delocalisation of pi electrons. 3) If it has 4n+2 pi electrons then it is aromatic. 4)If it has 4n pi electrons then it is anti aromatic.(n=1,2,3,4.....) and if none of thede then non aromatic. Hope it may help you.

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What is aromatic hydrocarbon?

Posted by Alok Kumar Shah 6 years, 5 months ago

CBSE > Class 12 > Chemistry

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Alok Kumar Shah 6 years, 5 months ago

Thank you for the answer.

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Yogita Ingle 6 years, 5 months ago

Aromatic Hydrocarbons are circularly structured organic compounds that contain sigma bonds along with delocalized pi electrons. They are also referred to as arenes or aryl hydrocarbons.
A few examples of aromatic hydrocarbons are provided below. It can be observed that all these compounds contain a benzene ring.

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Write a short note on Rosenmund reaction

Posted by Khushi Raikwar 6 years, 5 months ago

CBSE > Class 12 > Chemistry