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

No products in the cart.

Ask questions which are clear, concise and easy to understand.

Ask Question

Do simple ethers have dipole moments?

Posted by Mr. Singh 5 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Haber’s process?

Posted by ☺️Vanshika Baliyan?? 5 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Mr. Singh 5 years, 1 month ago

The Haber process, also called the Haber-Bosch process, is an artificial nitrogen fixation process and is the main industrial procedure for the production of ammonia today. It is named after its inventors, the German chemists FRITZ HABER and CARL BOSCH.

ANSWER

Imp topics chemistry 2021 in bord exam plzz send

Posted by Badboy Gaming 5 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Nikita Mittal 5 years, 1 month ago

Sorry hamne paper nhi banaya ???

ANSWER

Convert benzene into aspirin

Posted by Kavya Vishwakarma 5 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Mr. Singh 5 years, 1 month ago

Firstly, we need to have a salicylic acid group on benzene. The easiest way is sulphonation and hydration. 3.Aspirin formation.

ANSWER

A compound forms hexagonal close packed structure. what is the total number of voids in 0.5 mole of it? How many of these are tetrahedral voids?

Posted by Jasleen Kaur 5 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Saiharini Senthil 5 years, 1 month ago

Number of atoms in close packaging = 0.5 mol 1 has 6.022×10 23 particles So that Number of close-packed particles =0.5×6.022×10 23 =3.011×10 23 Number of tetrahedral voids = 2 × number of atoms in close packaging Plug the values we get Number of tetrahedral voids =2×3.011×10 23 =6.022×10 23 Number of octahedral voids = number of atoms in close packaging So that Number of octahedral voids =3.011×10 23 Total number of voids = Tetrahedral void + octahedral void =6.022×10 23 +3.011×10 23 =9.03×10 23

ANSWER

define schottky defect

Posted by Krishnapriya Sudeesh 5 years, 1 month ago

CBSE > Class 12 > Chemistry

3 answers

Raushani Singh 5 years, 1 month ago

The defect in which equal number of cations and anions are missing from their lattice site to maintain electrical neutrality

Sachin Rajput 5 years, 1 month ago

Schottky defect arises due to vacancy of equal number of cation and anion . EX Nacl ,Agbr

Saiharini Senthil 5 years, 1 month ago

Schottky defect is a type of point defect or imperfection in solids which is caused by a vacant position that is generated in a crystal lattice due to the atoms or ions moving out from the interior to the surface of the crystal.

ANSWER

Guys which is best either go through new sample or pyq for boards 12 .

Posted by Chaudhary Raam #Nda Love 5 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Manya Negi 5 years, 1 month ago

For boards 2021 new sample should be used

ANSWER

Why selenium do not form dihalides?

Posted by Sushma . 4 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Sia ? 4 years, 9 months ago

Halides have the high tendency to oxidise other atoms that is why they lie towards the top of the table for standard electrode potentials of all elements. Due to electronic repulsion between the lone pairs in unhybridised s and p orbitals, group 16 elements show decreasing tendency to be in +2 state down the group rather they tend to show more stability towards +4 and +6 states. Thus selenium stays in lower oxidation state and do not form dihalides.

ANSWER

Short note on Grinard Reagent

Posted by Suchismita Dikshit 5 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Yadav T 5 years, 1 month ago

General formula R-mg-X

Parkie Rani 5 years, 1 month ago

Mgbr ( magnesium bromide) is referred to as grinard reagent.

ANSWER

Propanol to ethane

Posted by Sameer 乛 5 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Jass . 5 years, 1 month ago

Ch3-ch2-ch2-oh (propanol) + KMnO4(potassium permanganate) = Ch3-ch2-cooh (propanoic acid) Ch3-ch2-cooh (propanoic acid) + CaO + NaOH (Soda lime) = Ch3-ch2-coona (sodium propanoate) Ch3-ch2-coona (sodium propanoate) + NaOH = Ch3-Ch3(ethane) + Na2co3(sodium carbonate)

Prithvi Charan 5 years, 1 month ago

dont knowwwwwwwwwwwwwwww

ANSWER

Explain why phenol is more acidic than alcohol?

Posted by Deepak Baranwal 5 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Nancy ??? 5 years, 1 month ago

Due to the formation of more resoance stabilized phenoxide ion

Sakshi Pal 5 years, 1 month ago

Due to resonance effect

ANSWER

What is CCP lattics

Posted by Kanchan Mudgal 5 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Raushani Singh 5 years, 1 month ago

The unit cell in which the constituent partical are present at the corner as well as at one one constituent partical is present at centre of each phase

ANSWER

how to learm packing efficiency in solid state well??

Posted by Saikat Dutta 5 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Yash Agarwal 5 years, 1 month ago

Just learn them because solving them would be lengthy in exam

ANSWER

Arrange the following compound in the increasing order of boiling point ch3ch2 ch2cho,ch3ch2ch2ch2oh,c2h5oc2h5 ,ch3ch2ch2ch2ch3

Posted by Ajay Singh 5 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Jass . 5 years, 1 month ago

Ch3-ch2-ch2-ch2-ch3 < c2h5-o-c2h5 < ch3-ch2-ch2-cho < ch3-ch2-ch2-ch2-oh

Nancy ??? 5 years, 1 month ago

ch3ch2ch2ch2oh>ch3ch2ch2cho>ch3ch2ch2ch2ch3>c2h5oc2h5

ANSWER

Why a negatively charged sol is obtained on adding AGNO3 solution to KI solution

Posted by Shivam Kashyap 5 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Solid A is a very hard electrical insulator in solid as well as in molten state and melts at extremely high temperature. What type of solid is it?

Posted by Sakshi Choudhary 5 years, 1 month ago

CBSE > Class 12 > Chemistry

3 answers

Saikat Dutta 5 years, 1 month ago

cavalent solid

Aditi Mishra 5 years, 1 month ago

Covalent solid

Ace Is Op 5 years, 1 month ago

Covalent solid such as diamond.

ANSWER

Difference between the order and molecularity

Posted by Dewash Rai 5 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Khushbu Singh✍️ 4 years, 11 months ago

Order of reaction : the sum of powers of the concentration of reactants in the rate Law expression. Molecularity : the no. Of reacting species which must collide simultaneously in order to bring about chemical reaction. Order may have zero, whole number or fractional values. Molecularity is always a whole no.

ANSWER

Write the structures of the products formed when anisole is treated with HI?

Posted by Aditi Halke 4 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Sia ? 4 years, 9 months ago

Anisole on reaction with HI gains H+ and forms methylphenyl oxonium ion. - Because of resonance, there's some partial double bond character between oxygen and carbon of benzene ring.

ANSWER

Deleted topics of chemical kinetics??

Posted by Tanya ?? 5 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Abhay Singh 5 years, 1 month ago

Concept of collision theory Activation energy Arrhenius equation

ANSWER

What is darzen process..???

Posted by Ravi Verma 5 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Tushar Gauba 5 years, 1 month ago

Bro ye very easiest method hota h ...kuki isme jo biproducts hote h vo so2 or hcl bnte h ...or gaseous nature k hote h to asani se inhe escape kra k rate of reaction fast hota h

ANSWER

Investigatory projects of class 12 that are easy to do

Posted by Aditya Subedi 5 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Good scoring chapter in chemistry

Posted by Mr. Fake... 5 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Riya Shekhawat❤️ 5 years, 1 month ago

P block

Shreyansh Saxena 5 years, 1 month ago

Ch10,ch11

ANSWER

What things do we write in a cbse project?

Posted by Drishty Kamboj 5 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

How can one recognize an anode and cathode by observing its electrode potential

Posted by Drishty Kamboj 5 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Aahana ❄❄ 5 years ago

LOAN se L=left side O= oxidation A= Anode N= Negative terminal ?i hope u understand ,sis

Aditi Mishra 5 years, 1 month ago

Loan means left oxidation anode negative

ANSWER

Semipermiable membrane?

Posted by Tanu Sharma 5 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Drishty Kamboj 5 years, 1 month ago

Selectively permeable or which only allows particular compounds to pass through and not all

ANSWER

Define the term ligand and give one example of cenidentate and one example of bidentate ligand.

Posted by Mehak Kaur 5 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Omii Rajput.... ? 5 years, 1 month ago

Ligands:A molecules ,ion or group that coordinates to a metal atom or ion in a complex or coordination compound is called ligand Unidentate ligands: water Bidentate ligands:oxalate ion

ANSWER

Why only sp3 hybridised carbon show nucleophilic substitution reaction.? And not sp2 or sp

Posted by Anukriti Jain 5 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Tushar Gauba 5 years, 1 month ago

Because they are very stable qnd makes good carbonation

ANSWER

Topics deleted from surface chemistry????

Posted by Tanya ?? 5 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Ronak ???? 5 years, 1 month ago

Catalysis, homogeneous and heterogeneous activity and selectivity. Emulsion - types of emulsions.

ANSWER

Werner theory

Posted by Shrabanee Mahakur 5 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Drishty Kamboj 5 years, 1 month ago

Primaru valency is the oxidation state of metal atom and secondary valency is its coordination number

Sudheer Mishra 5 years, 1 month ago

According to Werner theory, the central metal or the metal atoms in coordination compounds show two types of valency. They are the primary and secondary valency. .

ANSWER

What is integrated rate equation

Posted by Abhinav Agarwal 5 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Abhinav Agarwal 5 years, 1 month ago

Thanks Megha..

Megha . 5 years, 1 month ago

The integrated rate law is a differential equation, it describes the change in concentration of reactant(s) per change in time.

ANSWER

Page 38 of 608

myCBSEguide App

myCBSEguide

Trusted by 1 Crore+ Students

Test Generator

Test Generator

Create papers online. It's FREE.

CUET Mock Tests

CUET Mock Tests

75,000+ questions to practice only on myCBSEguide app

Google Play

Download myCBSEguide App