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

New forces of attraction set up between haloalkanes and water molecules are weaker than forces already existing between water molecules (hydrogen bo nding) or haloalkanes

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Why crystalline is isotropic in nature

Posted by Sunny Sah 7 years, 8 months ago

CBSE > Class 12 > Chemistry

2 answers

Princesses Kaur 7 years, 8 months ago

Example is rubber which is a crystalline solid

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Saumya Agrawal 7 years, 8 months ago

No they are anisotropic in nature which means it have different physical properties in different directiins.

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Why do we require artificial sweetening agent

Posted by Shubham Tripathi 7 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Amit Arora 7 years, 8 months ago

1To prevent tooth decay 2 To control blood sugar level in diabetic patients

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Define Osmotic pressure

Posted by Princesses Kaur 7 years, 8 months ago

CBSE > Class 12 > Chemistry

2 answers

Princesses Kaur 7 years, 8 months ago

Thanks to give me ans

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Abhijeet Singh 7 years, 8 months ago

the pressure that would have to be applied to a pure solvent to prevent it from passing into a given solution by osmosis, often used to express the concentration of the solution.

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The mole fraction of benzene in a solution with toluene is 0.50. Calcuate the mass percent of benzene in the solution. Plzzz reply fast

Posted by Ravi Kumar 7 years, 8 months ago

CBSE > Class 12 > Chemistry

2 answers

Ravi Kumar 7 years, 7 months ago

Thnxx ritesh ???

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Ritesh Kumar 7 years, 8 months ago

Mole fration of C6H6 =0.5 0.5 = given mass /78 Given mass = 39gm... Mole fraction of C7H8=1-0.5=0.5 Given mass = 92*0.5=46 Mass of soln=46+39=85 Mass% of benzene =39÷85*100

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How to study chemistry

Posted by Aryan . 7 years, 8 months ago

CBSE > Class 12 > Chemistry

3 answers

Amit Arora 7 years, 8 months ago

Focus on previous years questions after studying chapter through NCERT

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Rishabh Sahu 7 years, 8 months ago

Best way to study chemistry is through ncert for school and proper , complete ,and concise notes for competitive exams.

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Princesses Kaur 7 years, 8 months ago

With relese mind

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Test to distinguish between ethanol and phenol

Posted by Swati Kandpal 7 years, 8 months ago

CBSE > Class 12 > Chemistry

3 answers

Amit Arora 7 years, 8 months ago

Add neutral FeCl3 .Phenol gives violet colour of ferric phenoxide while alcohol do not

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Vennila Murali 7 years, 8 months ago

Test for phenol: Phenol discolourise bromide water forming a white precipitate. Phenol gives violet colour with neutral ferric chloride.

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Swati Kandpal 7 years, 8 months ago

Plz answer this guys

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Why the dipole moment of chlorobenzene is lower than that of cyclohexylchloride?

Posted by Soundhariyaa Damodaran 7 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Sambhav Tyagi 7 years, 8 months ago

Because chlorobenzene has SP2 hybridised carbon whereas cyclohexylchloride has SP3 hybridised carbon. So SP2 carbon has greater electronegative than SP3 carbon . Thus SP2 hybridised carbon in chloro benzene has less tendency to release electrons to Cl than SP3 hybridised carbon . Hence C-Cl bond in chloro benzene is less polar than in cyclohexylchloride. U=Q*D

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What is the meaning of dynamic equilibrium

Posted by Sachin Rastogi 7 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Princesses Kaur 7 years, 8 months ago

Means reaction is not stopped till equilibrium is situp products will produce

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How we can got that a reaction is reversible or irreversible eg N2 +3H2gives 2NH3 is a reversible process but how we got this reaction is reversible and that of Cu+ 2 H2SO4 gives CuSO4+ 2H2O + SO2

Posted by Yuvraj Singh 7 years, 8 months ago

CBSE > Class 12 > Chemistry

3 answers

Princesses Kaur 7 years, 8 months ago

N2 +3h2 give 2nh3 is a reversible process

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Yuvraj Singh 7 years, 8 months ago

Hii anyone answer plz how

2Thank You

Yuvraj Singh 7 years, 8 months ago

Is irreversible reaction how ?

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Copper which crystallise a face centerd lattuce has a density of8.93g/cm3 at 29c calcutated the edge of the unit cell

Posted by Pratik Singh 7 years, 8 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Why AgBr show both defects

Posted by Aanshu Kumar 7 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Siddharth Khandelwal 7 years, 8 months ago

Ag+ ion is smaller in size in AgBr, hence when removed from lattice point occupy interstitial sites hence show both defects

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Effect of dilution on kappa?

Posted by Urja Singh Singh 7 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Siddharth Khandelwal 7 years, 8 months ago

On dilution, conductivity increases while specific conductivity decreases

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What is fluids

Posted by N P 7 years, 8 months ago

CBSE > Class 12 > Chemistry

2 answers

Addya Sharma 7 years, 8 months ago

The tendency of flow of liquid or gas is called fluids

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Manglaram Gurjar 7 years, 8 months ago

fluid is a compound which can flow even there is a restriction of flow

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ANSWER

what are alcohols

Posted by Manglaram Gurjar 7 years, 8 months ago

CBSE > Class 12 > Chemistry

2 answers

Kanchan Rar 7 years, 8 months ago

Functional group

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Rishabh Sahu 7 years, 8 months ago

Group of compounds having an OH group attached to carbon atoms of the molecule.

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How is ammonia molecule a good ligand

Posted by Mahak Rathore 7 years, 8 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

what is electrochemistry

Posted by Suryansh Mishra 7 years, 8 months ago

CBSE > Class 12 > Chemistry

3 answers

Manglaram Gurjar 7 years, 8 months ago

The branch of chemistry in which we study about "electron`s" properties and its production

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Nilesh Kumar Mishra 7 years, 8 months ago

Study of production of electric charges through chemical reactions

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Sanu Chauhan Chauhan 7 years, 8 months ago

Study of electron in chemistry

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Allylic and benzylic halide show high reactivity towards the SN1 reaction .explain

Posted by Shaily Ameta 7 years, 8 months ago

CBSE > Class 12 > Chemistry

2 answers

Sambhav Tyagi 7 years, 8 months ago

Because the carbocation formed is stablised by resonance then acquire =bond

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Amit Arora 7 years, 8 months ago

Their carbonation are stabilized by resonance which is formed as intermediate during SN1 rxn

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What is isomorphism? Explain with example.

Posted by Nancy Khatri 7 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Aj Style 7 years, 8 months ago

The existance of two or more crystalline solids having similar chemical compositions in the crystalline form is called Isomorphism Ex:-Na3PO4,Na3AlO4

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Why is quartz glass amorphous and regular quartz crystalline if they both are SiO2

Posted by Nancy Khatri 5 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Satnam Singh 7 years, 8 months ago

Quatrz glass is amorphous silicon because it is one of the best photovoltic material converts light energy into electrical energy as on the other hand regular quatrz is crystalline because they are very smooth on heating and flows down and make the bottom slightly thicker on heating.

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Why intravenous injections are always dissolved in water containing salt

Posted by Ananya Sharma 7 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Big Boss 5 years, 11 months ago

intravenous injections are always dissolved in water containing salts at particular ionic concentrations that match with blood plasma concentrations and so on.

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What is stochiometry defect

Posted by Shubham Prajapati 7 years, 8 months ago

CBSE > Class 12 > Chemistry