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

Since H2SO4 is an oxidizing agent, it oxidizes HI (produced in the reaction to I2). As a result, the reaction between alcohol and HI to produce alkyl iodide cannot occur. Therefore, sulphuric acid is not used during the reaction of alcohols with KI.

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Isha Ahuja 7 years, 8 months ago

Because it is a strong oxidising agent and it will covert KI into HI and HI into I so iodide can nt be prepared

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Why methanal is gaseous at room temperature

Posted by Aarthi Kumar 7 years, 8 months ago

CBSE > Class 12 > Chemistry

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Is there any reduction of content next year??

Posted by Adarsh Adarsh 7 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Akshay Verma 7 years, 8 months ago

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Deleted portion of chemistry class 12th

Posted by Shivam Sharma 7 years, 8 months ago

CBSE > Class 12 > Chemistry

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Mole fraction of ki if the density of 20% (mass/mass) aqueous ki is 1.202 g /ml

Posted by Shiva Gupta 7 years, 8 months ago

CBSE > Class 12 > Chemistry

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How practically half life in first order reaction is independent of initial concentration?

Posted by Shashwat Kumar Singh 7 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Rishabh Sahu 7 years, 8 months ago

Practical evidence is radioactive decay whatever amount you take ,half life is same .

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What is ppm?

Posted by Ragini Giri 7 years, 8 months ago

CBSE > Class 12 > Chemistry

3 answers

Shajith Shajith 7 years, 8 months ago

Number of solute particle in 10^6 amount of solution

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Anjali Kumari 7 years, 8 months ago

1 ppm =10^-12meter

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Tanisha Saini 7 years, 8 months ago

It refers to Parts per million

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What is azeotropes ?

Posted by Aditya Parmer 7 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Amlani Sir 7 years, 8 months ago

A mixture of solution which boils at same temperature and can not be seperated by simple distillation.

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On the cbse online test the question related to ferrimagnetism answers are wrong can you check the answers please?...

Posted by Mousumi Prava Pradhan 7 years, 8 months ago

CBSE > Class 12 > Chemistry

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What do you mean by isomerism? What are the different types of isomerism? Explain functional isomerism with example

Posted by Kabeer Ansari 7 years, 8 months ago

CBSE > Class 12 > Chemistry

2 answers

Jaya Shanti 7 years, 8 months ago

the relation of two or more compounds, radicals, or ions that are composed of the same kinds and numbers of atoms but differ from each other in structural arrangement (structural isomerism) as CH 3 OCH 3 and CH 3 CH 2 OH, or in the arrangement of their atoms in space and therefore in one or more properties.

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Jaya Shanti 7 years, 8 months ago

Functional isomerism, an example of structural isomerism, The compound which have the same molecular formula but different functional groups, than they are called functional isomer and the phenomenon is functional isomerism.

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What is polar solvant

Posted by Rahul Pant 7 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Jaya Shanti 7 years, 8 months ago

Polar solvents have large dipole moments aka “partial charges”"they contain bonds between atoms with very different electronegativities, such as oxygen and hydrogen.

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At 48 degree celcius vapour pressure of pure cs2 is 850 torr 2 g of sulphur in 100 g cs2 has vapour pressure 844.9torr .calculate atomicity of sulphur

Posted by Anshu Deo 7 years, 8 months ago

CBSE > Class 12 > Chemistry

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What are solutions

Posted by Nav Deep 7 years, 8 months ago

CBSE > Class 12 > Chemistry

3 answers

Jaswanth Sai 7 years, 8 months ago

liquid contain solute and solvent is konw as solution

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Jaya Shanti 7 years, 8 months ago

liquid mixture in which the minor component (the solute) is uniformly distributed within the major component (the solvent

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Neha Gupta 7 years, 8 months ago

Not started yet.....

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C6H5OH IUPAC name

Posted by Ritik Chaudhary 7 years, 8 months ago

CBSE > Class 12 > Chemistry

2 answers

Bhushan Ameta 7 years, 8 months ago

Hexanol

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Tushar Vishwakarma 7 years, 8 months ago

IUPAC name Methanol and Common Name are Formaldehyde

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C6H5OH

Posted by Ritik Chaudhary 7 years, 8 months ago

CBSE > Class 12 > Chemistry

2 answers

Jaya Shanti 7 years, 8 months ago

That is phenol

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Shreya Sawkar 7 years, 8 months ago

Ethenol

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Why diamagnetic substance repel in magnetic field

Posted by Nishant Singh 7 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Amlani Sir 7 years, 8 months ago

In diamagnetic substance all electron are paired so they are repelled by magnetic field

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Please update us about new syllabus of chemistry

Posted by Sandeep Shrivastava 7 years, 8 months ago

CBSE > Class 12 > Chemistry

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What are solid

Posted by Shagufa Naaz 7 years, 8 months ago

CBSE > Class 12 > Chemistry

2 answers

Suraj Pal 7 years, 8 months ago

In the solid state atom have strong intermolecular force of attraction there called solid

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Sandeep Shrivastava 7 years, 8 months ago

Solid is a state in which partical are held together by strong attractive force

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Explain BCC & FCC

Posted by Adnan Saleem 7 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Tulja Bin 7 years, 8 months ago

BCC - unit cell in which the atoms are present at the corners and body center of the unit cell FCC - unit cell in which the atoms are present at the corners and face centers of the unit cell

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explain how much portion of an atom located at corner and body center of a cubic unit cell is a part of its neighbouring unit cell

Posted by Avinash Kumar 7 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Amlani Sir 7 years, 8 months ago

1/8 part

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How do determine the concentration of carbohydrates in milk products.....are the any methods......for school based experiments

Posted by Ashwin Raman 7 years, 8 months ago

CBSE > Class 12 > Chemistry

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What is nature of matter

Posted by Rahul Kumar 7 years, 8 months ago

CBSE > Class 12 > Chemistry

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What is the IUPAC name of aluminium tertiary butoxide

Posted by Krishna Kumari 7 years, 8 months ago

CBSE > Class 12 > Chemistry

2 answers

Jaswanth Sai 7 years, 8 months ago

C12 H27 AI03

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Jayaasrii Jayaasrii 7 years, 8 months ago

C12 H27 AlO3

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Write short notes on the following with suitable example a)zero order reaction b)first order reaction c)second order reaction

Posted by Diana Gopikrishnan 7 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Amlani Sir 7 years, 8 months ago

Pls refer to ncrt text book

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Calculate the mole fraction of benzoic acid,whose aqueous solution is 40%.

Posted by Ziya Mishra 7 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Tanmaya Nayak 7 years, 8 months ago

As 40% aqueous solution is given, so 40 g of benzoic acid(C6H5COOH) is present in 100g solution. Moles of benzoic acid=(given mass/molar mass) =40/122 =0.32mol Mass of solvent(water)=100-40=60g Moles of water=60/18 =3.33mol Mole fraction of benzoic acid = moles of solute(benzoic acid) / moles of solution (solute +solvent) =0.32/(0.32+3.33) =0.087 Mole fraction of benzoic acid=0.087.

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Difference between bcc fcc

Posted by Aysha Chaudhary 7 years, 8 months ago

CBSE > Class 12 > Chemistry