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

Suno jisko bhi chemistry me prblm hai wo sonipat Rakesh Kumar sir (my tution teacher)ke notes padho it's my guarantee that you will score above 65out of 70

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Calculate the bond enthalpy of N-H bond in NH3 (given) 1/2N2(g)+3/2H2(g)---------=NH3(g) delta H = -46Kmol

Posted by Kamaal Ansari 7 years, 10 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What are reducing sugar?

Posted by Shefali Shrivas 7 years, 10 months ago

CBSE > Class 12 > Chemistry

3 answers

Hitesh Kumar 7 years, 10 months ago

Yaar what is toilet reagent???????just kidding

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Insha Fatima 7 years, 10 months ago

They are basically carbohydrates which are capable of reducing feeling solution and toilets reagent.

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Hitesh Kumar 7 years, 10 months ago

A reducing sugar is any sugar that is capable of acting as a reducing agent because it has a free aldehyde group or a free ketone group. Example of reduving sugar are all monosaccharides etc....??

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The molecule which has zero dipole moment is

Posted by Ambrish Yadav 7 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Radhika Tyagi 7 years, 10 months ago

Any regular geometry

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Hitesh Kumar 7 years, 10 months ago

CCL4 and CO2

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Difference between polymers nd macromolecules

Posted by Astha Mishra 7 years, 10 months ago

CBSE > Class 12 > Chemistry

4 answers

Hitesh Kumar 7 years, 10 months ago

Question bhi to 1 he hai toh answer bhi 1 he hoga na yaar???

1Thank You

Aisha Grewal 7 years, 10 months ago

Baat to ek hii h

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Hitesh Kumar 7 years, 10 months ago

Macromolecules are molecules made of smaller subunits. Polymers are macromolecules made of repeating subunits.

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Aisha Grewal 7 years, 10 months ago

A polymer is made up of small repeating structural unit.... Whereas macromolecular are not composed of repeating units

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ANSWER

What are cationic and anionic detergents?

Posted by Love Sidhu 7 years, 10 months ago

CBSE > Class 12 > Chemistry

5 answers

Shalini Tiwari 7 years, 10 months ago

ANIONIC DETERGENT- these are sodium salts of sulphonated long chain alcohols or hydrocarbons. CATIONIC DETERGENT- these are quartenery ammonium salts of halides.

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Aisha Grewal 7 years, 10 months ago

Anionic in which polar part of molecule is negative ion. While cationic are those in which polar part is cation ion

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Vijeta Kanwar 7 years, 10 months ago

Hloo shtabdi

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Shatabdi Biswas 7 years, 10 months ago

Sorry see in ncert book

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Shatabdi Biswas 7 years, 10 months ago

See in never book

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ANSWER

How to get 50+ marks in chemistry out of 70 marks

Posted by Sheetal Wankhede 7 years, 10 months ago

CBSE > Class 12 > Chemistry

10 answers

Unique Person Arupitw 7 years, 10 months ago

Welcome

2Thank You

Hitesh Kumar 7 years, 10 months ago

Thanks Unique person ?

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Unique Person Arupitw 7 years, 10 months ago

By the way arihant is best

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Unique Person Arupitw 7 years, 10 months ago

Only 50+

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Hitesh Kumar 7 years, 10 months ago

Arihant is the best for all subjects ??

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Aisha Grewal 7 years, 10 months ago

According to me, arihant is best for physics....

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Hitesh Kumar 7 years, 10 months ago

Yeah I no that. But if you want to score good in less time then Arihant is more better than Xam Idea.???

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Aisha Grewal 7 years, 10 months ago

Xam idea better than arihant

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Hitesh Kumar 7 years, 10 months ago

Arihant +cbse guide app

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Aisha Grewal 7 years, 10 months ago

Xam idea

1Thank You

ANSWER

How we take anion and cation in nomenclature of coordination compound

Posted by Shivani Tyagi 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Hitesh Kumar 7 years, 10 months ago

See in NCERT notebook???

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How to write electronic configuration auflous rule

Posted by Kaushal Kumar 7 years, 10 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

write significance of henry's constant?

Posted by Anjali Tamboli 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Hitesh Kumar 7 years, 10 months ago

?.During scuba diving, driver breathes in the compressed air from supply tank , more Nitrogen is dissolved in blood because of more pressure at depth ?. Henry's constant plays a vital role in environmental chemistry.

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why ammonia and hcl do not obeys henry's law ?

Posted by Anjali Tamboli 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Radhika Tyagi 7 years, 10 months ago

Nh3 and hcl react to form nh4cl which may lead to a change in composition. Therefore Henry's law is not applicable as composition changes

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why helium is used in diving apparatus?

Posted by Anjali Tamboli 7 years, 10 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Is derivation of nerns't equation is important for exam point of view?

Posted by Sheetal Wankhede 7 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Radhika Tyagi 7 years, 10 months ago

Do only numericals

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Aisha Grewal 7 years, 10 months ago

No....

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So2 is reducing agent while Teo2 is an oxidizing agent. How? If I write the sulphur configuration then it's end with 3p orbital. It have no d orbital so how it's reduction number changes from 4 to 6

Posted by Ashish Singh 7 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Ashish Singh 7 years, 10 months ago

How can you proof. That it's oxides from 4 to 6.

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Radhika Tyagi 7 years, 10 months ago

So2 tends to oxidize itself from +4 to +6 therefore acting as reducing agent whereas due to inert pair effect teo2 tends to reduce itself thereby acting as oxidizing agent

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Define solid state

Posted by Aditya Pandey 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Aisha Grewal 7 years, 10 months ago

Unit hii define krn h kya

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ANSWER

Calculate the mass percentage of benzene and carbamate tetrachloride if22g of benzene is resolved in 122g of carbon tetrachloride

Posted by Abhimanyu Yadav 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Abhimanyu Yadav 7 years, 10 months ago

Benzene 15.28per and carbon tetrachloride 84.72

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ANSWER

What is hyperconjugation

Posted by Kumar Lekhraj 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Hitesh Kumar 7 years, 10 months ago

Hyperconjugation is the stabilising interaction that results from the interaction of the electrons in a σ-bond (usually C-H or C-C) with an adjacent empty or partially filled p-orbital or a π-orbital to give an extended molecular orbital that increases the stability of the system.

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Why transition metals used as catalyst ?

Posted by Salman Arora 7 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Radhika Tyagi 7 years, 10 months ago

Bcz they are good absorbant

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Prateek Gupta 7 years, 10 months ago

Because they have property of changing oxidation state and even they absorb other substances on their surface

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ANSWER

What is the cordination no in a close packed structure

Posted by Rahul Patra 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Aisha Grewal 7 years, 10 months ago

Hcp had coordination no. 12and contains 6 atoms per unit cell Fcc had coordination no 12 and contains 4atoms per unit cell Bcc had coordination no 8 contain 2atoms per unit cell

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ANSWER

Electricity

Posted by Vishal Rana 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Amit Kumar 7 years, 10 months ago

mare tabelen ni gayi hui hai bassan garmi teh pareshan hu gayi teh ... doodh bhi jaal ke pannir ban jawai hai

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ANSWER

What is Zeolites

Posted by Jasbir Singh 7 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Amit Kumar 7 years, 10 months ago

zeolites are aluminiumsilicate metal compounds . its oxide of metals and found in nature as well as can be synthesised in lab . it has porous structure and hence its a shape selective catalyst. its used in petrochemical industry manly for converting petroleum into gasoline directly

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Hitesh Kumar 7 years, 10 months ago

Zeolites are crystalline solids structures made of silicon, aluminum and oxygen that form a framework with cavities and channels inside where cations, water and/or small molecules may reside.

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What is the absorbent in high vaccume

Posted by Shashidhara Pg 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Amit Kumar 7 years, 10 months ago

can you frame your question more appropriately please

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Why vitamin c cannot be stored in our body?

Posted by Samrat Rc 7 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Amit Kumar 7 years, 10 months ago

because it leaks via urine as its water soluble . agar hum toilet nahi karengey toh yeah sallir mei rawat hai

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Radhika Tyagi 7 years, 10 months ago

Bcz it is a water soluble vitamin and gets excreted out of the body. Therefore it cannot be stored in the body.

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After 5 half period of a first order reaction what fraction of reactant remains?

Posted by Hitesh Kumar 7 years, 10 months ago

CBSE > Class 12 > Chemistry

4 answers

Hitesh Kumar 7 years, 10 months ago

Thanks Ravi??

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Ravi Singh 7 years, 10 months ago

Nt = No (1/2)^5 = No/32 so, 1/32 times of initial reactant remains

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Hitesh Kumar 7 years, 10 months ago

Lakin answer ye nahi hai ????

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Radhika Tyagi 7 years, 10 months ago

3.125

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What are 12-16and13-15 compounds? Give example.

Posted by Shailesh Kumar 7 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Radhika Tyagi 7 years, 10 months ago

Grp 12-16 compounds are those compounds which are formed by cation of grp 12 and anion of grp 16. Eg ZnS Similarly for grp 13-15 compounds. Eg GaAs

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Amit Kumar 7 years, 10 months ago

nahi pata eg bhi nahi pata

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What type of linkage holds together the monomers of D.N.A

Posted by Shailesh Kumar 7 years, 10 months ago

CBSE > Class 12 > Chemistry

3 answers

Amit Kumar 7 years, 10 months ago

anjali galat answer na dey rei chori

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Anjali Sharma 7 years, 10 months ago

Phosphodiester bond

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Amit Kumar 7 years, 10 months ago

friendship ka bond

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number of sigma and pie bond in c2 molecules

Posted by Shubham Deo 7 years, 10 months ago

CBSE > Class 12 > Chemistry

5 answers

Hitesh Kumar 7 years, 10 months ago

Draw the mot diagram. You will realise that that the bonding electrons are in the shell ie pi(2px) and pi(2py) hence they participate in bonding as the rest of the electron are considered as inner shell electrons. And these orbitals are pi type hence pi bonds are formed.

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Vijay Bhatt 7 years, 10 months ago

To be pie there must be a Sigma bond

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Vijay Bhatt 7 years, 10 months ago

How hitesh

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Hitesh Kumar 7 years, 10 months ago

No of sigma bond =0 No of pi bonds is =2

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Vijay Bhatt 7 years, 10 months ago

C2 contains single bond means 1Sigma Double bond means 1 Sigma and 1 pie Triple bond means 1 Sigma and 2 pie

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Give the significance of a 'lattice point'.

Posted by Aditya Raj 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Hitesh Kumar 7 years, 10 months ago

Lattice point represents the constituent particles of a crystalline solid (as points). These constituent particles may be an atom, molecule or an ion.

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Name the parametres that characteristics a unit cell.

Posted by Aditya Raj 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Hitesh Kumar 7 years, 10 months ago

A unit cell is characterised by six parameters: (i) dimensions of unit cell along the three edges, . i.e. a, b, c. (ii) three angles between the edges

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Cyclo hexyl methanol

Posted by Anjali Gupta 7 years, 10 months ago

CBSE > Class 12 > Chemistry