CBSE > Class 11 > Chemistry | CBSE Board | Homework Help

Antimarkovnikov's rule: According to this rule the addition of HX is exactly opposite to that of Markovnikov's rule. As per this rule, the halide ion gets added to the less substituted doubly bonded carbon atom.

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Why Be3+ does not form ionic compound or halides

Posted by Vedika Pathak Pathak 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Prakhar J 6 years, 11 months ago

Since electronic configuration of Be is : 1s^2 2s^2 . If it looses elctrons it will only form Be2+ ion and to form Be 3+ a large amount of ionization enthalpy will be needed.

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Calculate [H3o+] and [OH-] for blood serum, the pH of which is 7.4.

Posted by Jasmine Jasmine 6 years, 11 months ago

CBSE > Class 11 > Chemistry

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All important questions of some basic concepts of class Xl

Posted by Luckshay Kukreja 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Adwitha Nair???‍??‍? 6 years, 11 months ago

Mole concept,laws of.chemical.combination,stoichiometeric calculations,molarity,molality

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What is ( n+l) rule

Posted by Singh Rajput 6 years, 11 months ago

CBSE > Class 11 > Chemistry

2 answers

Mohit Kaintura 6 years, 11 months ago

i dont know

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Lavanya ❤️? 6 years, 11 months ago

The rule is based on the total number of nodes in the atomic orbital, n + ℓ, which is related to the energy. In the case of equal n + ℓ values, the orbital with a lower n value is filled first.

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-Write the mechanism of free radical substitution reaction. Ch4+cl2------h√------> ch3--Cl+ Hcl

Posted by Affan Chaudhary 6 years, 11 months ago

CBSE > Class 11 > Chemistry

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What is zeemen effect

Posted by Singh Rajput 6 years, 11 months ago

CBSE > Class 11 > Chemistry

2 answers

Ankit Singh 6 years, 11 months ago

The Zeeman effect is the splitting of the spectral lines of an atom in the presence of a strong magnetic field. The effect is due to the distortion of the electron orbitals because of the magnetic field. The (normal) Zeeman effect can be understood classically, as Lorentz predicted.

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Akanksha Kumari? 6 years, 11 months ago

The splitting of a spectrum line into several component by application of magnetic field is called zeeman effect

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Sandmeyer's reaction?

Posted by Ejta Ardhi 6 years, 11 months ago

CBSE > Class 11 > Chemistry

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Sugar is soluble in water though it is a covalent compound.why?

Posted by Alok Raj 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Gaurav Seth 6 years, 11 months ago

Sucrose is a sugar and if you look at its structure there are a lot of OH groups these groups hydrogen bond to water and help to form a solvation sphere around the molecule. Ethanol has only one OH group it is less polar than water. There is a general adage that like dissolves in like, sucrose is polar, water is polar and so they dissolve, ethanol is less polar and so less like and therefore does not dissolve.

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Examples of dextrorotary compounds??

Posted by Kp Mourya 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Akanksha Kumari? 6 years, 11 months ago

D- lactic acid

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What is the liquid non metal

Posted by Jahnvi Singh 6 years, 11 months ago

CBSE > Class 11 > Chemistry

2 answers

Annu Sheraya 6 years, 11 months ago

Mercury

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Salaj Jaiswal 6 years, 11 months ago

Those non metal which is found in liquid state at room temperature called liquid non metal.

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Difference b/n orbits and orbitals? At least 3 -4 points.

Posted by Itss Me Jippo 6 years, 11 months ago

CBSE > Class 11 > Chemistry

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Molecular orbitol diagram of O2 ,N2

Posted by Ridham Katoch 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Affan Chaudhary 6 years, 11 months ago

In this app pic upload is not available .so MOT is only draw in note book

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Solution for the reaction p4+OH-=pH3+HPO2-

Posted by Ashu Fa 6 years, 11 months ago

CBSE > Class 11 > Chemistry

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O l CH3-C-O-COH

Posted by Ɽøⱨł₮ ₲Ʉ₱₮₳ 6 years, 11 months ago

CBSE > Class 11 > Chemistry

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Definition of kjeldahl's method

Posted by Hari Trvd 6 years, 11 months ago

CBSE > Class 11 > Chemistry

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CBSC important questions for board exam

Posted by Lokesh Kagodu 6 years, 11 months ago

CBSE > Class 11 > Chemistry

2 answers

Ankit Singh 6 years, 11 months ago

Yes u will get in this app

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Priya Dharshini ? 6 years, 11 months ago

U will get it in this app

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How are 0.5m NaOH and 0.5M are differ from each other

Posted by Ajitpal Dhillon 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Akanksha Kumari? 6 years, 11 months ago

Here m= molality M=molarity and both are different

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Solubility of ZnS in water is 0.97 g/L we mixed 2 moles of zn(NO3)2 in 5 L solution find new solubility of ZnS

Posted by Saba Elias 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Sugam Sharma 6 years, 11 months ago

Is answer of this question = 0.025 moles/litre

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What is formal charge??

Posted by Harjot Singh 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Yogita Ingle 6 years, 11 months ago

“The formal charge over an atom of a polyatomic molecule or ion is the difference between the valence electron of that atom in the elemental state and the number of electrons assigned to that atom in Lewis structure.”

Mathematically, it can be expressed by following formula:

F.C. = [Total no. of valence e^– in free state] – [total no. of e^– assigned in Lewis structure]
F.C. = [Total no. of valence e^– in free state] – [total no. of non-bonding pair e^– (lone pair)] – 1/2 [total no. of bonding e^–]
The factor of ½ is attached to the no. of bonding e^– because bonding e^– is shared between two atoms.

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What is salt bridge and its function

Posted by Janvi Dahre 6 years, 11 months ago

CBSE > Class 11 > Chemistry

2 answers

Gopal Ji Mishra 6 years, 11 months ago

salt bridge is the bridge contained in electrolytic cell and it is of u shaped.

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Yogita Ingle 6 years, 11 months ago

A salt bridge is a U- shape containing concentrated solution of an inert electrolyte like KCl, KNO₃, K₂SO₄ etc.or a solidified solution of those electrolytes in agar-agar solution and gelatin.
These inert electrolytes do not take part in redox reaction of the cell and even dont react with the electrolyte used.
The main functions of a salt bridge are;

They allow the movement of ions from one solution to another without mixing of the two solutions and complete the electrical circuit.
To maintain the electical neutrality of the solutions in the two half cells.

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What happens when boric acid is heated

Posted by Sejal Tamta 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Gaurav Seth 6 years, 11 months ago

Boric acid on heating above 170C gives metaboric acid, which on further heating above 300C gives tetraboric acid (or boric acid). Boric acid may sometimes refer to any of these acids. On further heating gives boron trioxide.

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Which will have higher boiling point : a non polar compund or polar?? .. why ??

Posted by Sanidhya Jadaun? 6 years, 11 months ago

CBSE > Class 11 > Chemistry

2 answers

Akanksha Kumari? 6 years, 11 months ago

Because of weak vanderwaal forces

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Shatayu Ganvir 6 years, 11 months ago

A non polar molecule

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Give 1to 10 name reaction

Posted by Nikhil Sharma 6 years, 11 months ago

CBSE > Class 11 > Chemistry

0 answers

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Explain why odd cummelenes do not form optical isomers?

Posted by Akanksha Kumari? 6 years, 11 months ago

CBSE > Class 11 > Chemistry

1 answers

Shatayu Ganvir 6 years, 11 months ago

Cumelenes means alkenes having odd number of double bonds... For optical activity we will need chiral carbon and it is sp3 hybridised but the carbon of cumelenes are not sp3 hybridised hence they are not optical active

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What is specific rotation and optical purity??

Posted by Akanksha Kumari? 6 years, 11 months ago

CBSE > Class 11 > Chemistry