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Why the volume of ice is more and volume of water is less?

Posted by Ujjwal Joshi 7 years, 10 months ago

CBSE > Class 11 > Chemistry

1 answers

Aashita Sharma 7 years, 10 months ago

Due to presence of inter molecular Hydrogen bonding in ice surface area increases density decreases volume increases.

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What is the oxidation state of sulphur in the following compounds: A)Na2S2O3 B)Na2S2O4 C)Na2S4O6

Posted by Shaista Shaista 7 years, 10 months ago

CBSE > Class 11 > Chemistry

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Give the group,period, electronic configuration and valency of the elements having atomic number 119 ???..

Posted by Shaista Shaista 7 years, 10 months ago

CBSE > Class 11 > Chemistry

1 answers

Aashita Sharma 7 years, 10 months ago

8 period (Uun)8s^1 1 gp

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What is the preparation of D2O2?

Posted by Shaista Shaista 7 years, 10 months ago

CBSE > Class 11 > Chemistry

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Energy level diagram of O2+

Posted by Avinash Yadav 7 years, 10 months ago

CBSE > Class 11 > Chemistry

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why I-cl compound is non polar

Posted by Rudra Singh 7 years, 10 months ago

CBSE > Class 11 > Chemistry

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an alkene x on ozonolysis give pent-2-one and ethanal identify x and write the reaction involved

Posted by Tausif Raza 7 years, 10 months ago

CBSE > Class 11 > Chemistry

0 answers

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Strong and weak liganda

Posted by Abhishek Chaudhary 7 years, 10 months ago

CBSE > Class 11 > Chemistry

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Strong and weak ligand

Posted by Abhishek Chaudhary 7 years, 10 months ago

CBSE > Class 11 > Chemistry

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Why alkanes are sp3 hybridized??

Posted by Aanchal Bajpai 7 years, 10 months ago

CBSE > Class 11 > Chemistry

2 answers

Tushar Jaryal 7 years, 10 months ago

due to 4 sigma bonds not 3..!!

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Hari Om Gobind 7 years, 10 months ago

Because they have 3 sigma bonds

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What rule do we follow while naming an ether compound?

Posted by Sayena Simron 7 years, 10 months ago

CBSE > Class 11 > Chemistry

1 answers

Khushi Garg 7 years, 10 months ago

Ethers are compounds having two alkyl or aryl groups bonded to an oxygen atom, as in the formula R1–O–R2. The ether functional group does not have a characteristic IUPAC nomenclature suffix, so it is necessary to designate it as a substituent. To do so the common alkoxy substituents are given names derived from their alkyl component

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Pyrolysis of C6H14

Posted by Umang Verma 7 years, 10 months ago

CBSE > Class 11 > Chemistry

2 answers

Bharjil Borah 5 years, 11 months ago

why c5h10 + ch4 is not shown

2Thank You

Sayena Simron 7 years, 10 months ago

Pyrolysis of C6H14 is:- CH3-CH2-CH2-CH2-CH2-CH3 ------C6H12 + H2 / C4H8 + C2H6/ C3H6 + C2H4 + CH4 We just have to take care that C6H14 is broken down into smaller compounds.

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What is difference in oxo acids and hydoxides of alkali metals of s block?

Posted by Khushi Garg 7 years, 10 months ago

CBSE > Class 11 > Chemistry

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Name of HOOCCH2-C-CH2COOH

Posted by Sakshi Kumari 7 years, 10 months ago

CBSE > Class 11 > Chemistry

2 answers

Tushar Jaryal 7 years, 10 months ago

pentane dioic acid .... bcz 2 COOH groups

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Khushi Garg 7 years, 10 months ago

If an unbranched chain is directly linked to more than two carboxy groups, these carboxy groups are named from the parent hydride by substitutive use of a suffix. ‘carboxylic acid’ This is such a case hence the parent chain is propane: Propane-1,2,3-tricarboxylic acid

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Explain Solvay-ammonia-process in detail..

Posted by Muskan Sharma 7 years, 10 months ago

CBSE > Class 11 > Chemistry

2 answers

Muskan Sharma 7 years, 10 months ago

Bt why so its not explain here?

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Niraj Yadav 7 years, 10 months ago

If u wnt in dtail thn its givn in ncert txtbook

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Gyanasthali vidyalaya rewa last year question paper

Posted by Surya Surya 7 years, 10 months ago

CBSE > Class 11 > Chemistry

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Why are half and fully filled orbitals are more stable

Posted by Anushree Sonotra 7 years, 10 months ago

CBSE > Class 11 > Chemistry

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Explain the non-formation of helium molecule acc.to valence bond approach.

Posted by Anushree Sonotra 7 years, 10 months ago

CBSE > Class 11 > Chemistry

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The volume of a gas is reduced to half from its original volume. Predict the change in its specific heat

Posted by Anushree Sonotra 7 years, 10 months ago

CBSE > Class 11 > Chemistry

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Why orthodichlorobenzene has more dipole moment than para dichlorobenzene

Posted by Abhey Mittal 7 years, 10 months ago

CBSE > Class 11 > Chemistry

1 answers

Abhey Mittal 7 years, 10 months ago

Due to bond angle. O dichlorobenzene has less bond angle than p-dichlorobenzene

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Out of nh3 and NF3 which has higher dipole moment

Posted by Karan Chhabra 7 years, 10 months ago

CBSE > Class 11 > Chemistry

1 answers

Ashu Sahib 7 years, 10 months ago

Just looking at NH3 and NF3, you might assume that NF3 will have high dipole moment than NH3 as 'F' is more electronegative. But, NH3 has more dipole moment than NF3.In NH3, N is more electronegative than H. So, N pulls the electrons from H towards itself and so, the direction of moment due to the N-H bonds is in the same direction as that of the lone pair of electrons on Nitrogen.In NF3, F is more electronegative than N. So, all F atoms pull the electrons towards themselves. And, this resultant moment is opposite to the directions of that of the lone pair of electrons on the 'N' atom. And, since Dipole Moment is a vector quantity, the net dipole decreases.And, so we have NH3 whose dipole moment is much higher than that of NF3.

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What is the effect of concentration change, pressure, temperature, or catalyst on Equilibrium.

Posted by Vedika Mourya 7 years, 10 months ago

CBSE > Class 11 > Chemistry

1 answers

Ankitha R 7 years, 10 months ago

If concentration of reactants is more then the equilibrium shifts to forward direction if concentration of products is more then the equilibrium shifts to back ward direction If pressure is increase the equilibrium shifts to less number of mole if pressure is decreased then in the direction of more number of moles Catalyst has no effect on equilibrium

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What is wurtz fittig reaction??

Posted by Aman Chauhan 7 years, 10 months ago

CBSE > Class 11 > Chemistry

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Why CO2 is gas

Posted by Prashasti Gupta 7 years, 10 months ago

CBSE > Class 11 > Chemistry

1 answers

Àñshul Shärmã 7 years, 10 months ago

Carbon dioxide is a linear structure with two double bonds between carbon and oxygen it is a small molecule and nonpolar with only weak bonds between the molecules hence it is a gas

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Why Co2 is gas but SiO2 is solid ?

Posted by Prashasti Gupta 7 years, 10 months ago

CBSE > Class 11 > Chemistry

1 answers

Ayush Kaushik 7 years, 10 months ago

1) Co2 consist of individual molecules with one central Carbon atom double bonded to two oxygen atoms.But Silicon does not form double bonds with oxygen. 2) SiO2 is giant molecular structure but CO2 is simple molecular structure. Becoz of these two reasons CO2 is gas but SiO2 is solid.

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Lithium chloride covalent while sodium chloride is ionic in nature

Posted by Suraj Kumar 7 years, 10 months ago

CBSE > Class 11 > Chemistry

1 answers

Riya Goel 7 years, 10 months ago

Size of lithium is very small as compared to sodium. Due to high effective nuclear charge of lithium it is unable to show ionic nature and hence bond b\w Li and Cl is covalent whereas Na shows ionic nature due to less effective nuclear charge. Na can donate e- this makes it ionic and hence forms ionic bond.

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General configuration of s, or, and D black elements

Posted by Shraddha Kamble 7 years, 10 months ago

CBSE > Class 11 > Chemistry