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

The lone pair of halogen atom delocalizes in the phenyl ring and develops a partial double bond character in C—X bond,making it more strong. But no such resonance possible in case of saturated halo-alkanes. So there is a difference in hybridisation of the C-X bond i.e.,in haloalkanes,the hybridisation is sp3 but in haloarenes it is sp2 . So halogen atom is hold more tightly in halo-arenes.So c-x of haloarene is smaller than c-x of haloalkane.

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WHAT IS THE VALUE OF VAN'T HOFF FACTOR IF SOLUTE MOLECULES UNDERGO DIMERISATION

Posted by Preejith Ps 7 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Ramesh Babu 7 years, 3 months ago

Vant Hoff's factor(i)=1-x/2 where x=degree of dissociation

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My chemistry de 4 chapter ho gye ne ke tuhanu lagda ga ke syllabus complete ho jo ga

Posted by Gurmeet Singh 7 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Anjali Sharma 7 years, 3 months ago

Lagda h ho jaga march tak

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How much syllabus of chemistry done

Posted by Gurmeet Singh 7 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Rehan Khan 7 years, 3 months ago

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The decomposition of N2O5

Posted by Chandan Nishant 7 years, 3 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

why ionisation energy of nitrogen is very very high?

Posted by Prateek Srivastav 7 years, 3 months ago

CBSE > Class 12 > Chemistry

2 answers

Ramesh Babu 7 years, 3 months ago

Due to half filled stable electronic configuration,the energy required for the removal of electron from Nitrgen is very high .Hence its IP is high

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Shivani Gupta 7 years, 3 months ago

Becoz nitrogen is one of the most electonegative element so it becomes hard to loose a electron hence ionisation energy is high

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A salt water solution has a concentration of 1% by mass . Some water is evaporated such that concentration becomes 2% by mass . By how much percentage mass of the solution changes due to evaporation

Posted by Nirupam Bhardwaj 7 years, 3 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What is the difference between sigma bond and pi bond

Posted by Navneet Kumar Niraj 7 years, 3 months ago

CBSE > Class 12 > Chemistry

2 answers

Ayushi Kumari 7 years, 3 months ago

Sigma bond is strong and pi bond is weak

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Anjana Sherawat 7 years, 3 months ago

Sigma bond is formed by end to end overlapping and pi bond is formed by sidewise overlapping

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Class 12th p block.....what is the meaning of polarising power

Posted by Sudhakar Gothwal 7 years, 3 months ago

CBSE > Class 12 > Chemistry

0 answers

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Why H2O is liquid and H2S is gas at room temp.

Posted by Sardaar Ji 7 years, 3 months ago

CBSE > Class 12 > Chemistry

4 answers

Samir Mughal??????️? 7 years, 3 months ago

Due to H-H intermolecular bonding.

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Kiara Khurrana 7 years, 3 months ago

sardaar ji tu kutte ke maut marega

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Sardaar Ji 7 years, 3 months ago

Tnx miss jashanpreet kaur

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Jashanpreet Kaur 7 years, 3 months ago

Due to high electronegativity of oxygen and its small size there are strong hydrogen bonding in water As a result the molecules exists as associated and is liquid at room temperature but there is negligible hydrogen bonding in H2S beacuse of low electronegativity of S

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Why freezing point of solution is lower than that of solvent

Posted by Ishu Arora 7 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Sara Aijaz 7 years, 3 months ago

Due to the presence of non volatile solute in your solvent

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Why does the value of molar conductivity and equivalent conductivity increases with dilution but the value of specific conductivity decreases

Posted by Sujata Kumari 7 years, 3 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Why is glass considered a super cooled liquid?

Posted by Atul Chahar Chahar 7 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Suparna Bhattacharjee 7 years, 3 months ago

Glass is an amorphous solid. It has tendency to flow very slowly . Thus glass is a supercooled liquid.

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Raoults law when solute is non voaltile

Posted by Khushpreet Kaur 7 years, 3 months ago

CBSE > Class 12 > Chemistry

0 answers

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Conversion butene to propanol

Posted by Shivam Singh 7 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Xyz Xyz 7 years, 3 months ago

but1ene+o3zn/h2o___propanal+h2/ni__propnol_

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ZnO is white when cold and yellow when heated.why??

Posted by Satyam Singh Gurjar 7 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Suparna Bhattacharjee 7 years, 3 months ago

Zinc oxide which is white in colour on heating it loses oxygen an turns yellow. Due to the excess 9f zinc ions in the crystal its formula becomes zn1+xO. Thule excess zn2+ions move to interstitial site and electrons to neighboring intersititial sites..

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What is reshmisation

Posted by Pooja Pooja 7 years, 3 months ago

CBSE > Class 12 > Chemistry

0 answers

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What is Bismuth called as typical metal...can anybody help me out that what is actually a typical metal???

Posted by Nikita Gupta 7 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Shivani Gupta 7 years, 3 months ago

Bcoz of being radioactive

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In which one of the following equilibria the increase of pressure over the equilibrium will favour the backward reaction? A decomposition equilibrium of HI b formation equilibrium of SO3. c decomposition equilibrium of NH3 d formation equilibrium of PCL5

Posted by Vishal Singh 7 years, 3 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Why is frenkel defect not found in pure alkali metal halides

Posted by Iqbal Singh 5 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Suparna Bhattacharjee 7 years, 3 months ago

This defect is not shown by alkali metal halides because alkali metal ions have large size which cannot fit into the interstitial sites.

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Convert acetone to tertiary butyl alcohol

Posted by Ananya Mukherjee 7 years, 3 months ago

CBSE > Class 12 > Chemistry

2 answers

Vishal Singh 7 years, 3 months ago

Conversion: CH3COCH3 -->(CH3)3C-OH. CH3-CO-CH3 +CH3-MgBr---->(CH3)3-C-OH

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Prashant Kumar 7 years, 3 months ago

You can convert acetone to tertiary butyl alcohol with the help of grignard reagent CH3 - CO -CH3 + CH3 - Mg -Br. ----------------->(CH3 )3 - OH

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Explain "the π-complexes are known for the transition metals only.

Posted by Aarushi Dhiman 7 years, 3 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Calculate the potential OF hydrogen electrode IN contact with a solution whose pH is 10

Posted by Mansi Thakur 7 years, 3 months ago

CBSE > Class 12 > Chemistry

2 answers

Xyz Xyz 7 years, 3 months ago

ph=-log H+ion

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Astha Sharma 7 years, 3 months ago

Ph =log H+

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Is Nacl is neutral colloid ??

Posted by Mohammad Amaan 7 years, 3 months ago

CBSE > Class 12 > Chemistry

2 answers

Payal Verma 7 years, 3 months ago

Yesss......it is

0Thank You

Rohit Pathak 7 years, 3 months ago

Yes

3Thank You

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What is henry's law

Posted by Sonali Nayak 7 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Avnii Singh 7 years, 3 months ago

HENRY LAW state that at the constant temp.the solubility of a given gas compound is directly proportional to the partial pressure of a gas exerted on the surface of liquid P= kh. m Where kh is HENRY CONSTANT.

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