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

Acids are classified based on their property to release hydrogen ions. Hydrogen ions can be easily released from phenol than from ethanol. So phenol is more acidic than ethanol

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Arjun R 7 years, 1 month ago

Due conjugation

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Why are detergent non biodegradable while soaps are biodegradable ??

Posted by Rajan Malhotra 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

E S 7 years, 1 month ago

Detergent are non biodegradable because of the presence of branched chain.

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An organic compound 'A' having molecular formula C3H6 on treatment with aqueous H2SO4 gives 'B' which on treatment with HCl/ZnCl2 gives 'C'. The compound 'C' on treatment with ethanolic KOH gives back the compound 'A'. Identify the compound 'C'.

Posted by Mannavan J 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Disha Rajput 7 years, 1 month ago

Cis2-chloropropane

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Cbse exam pattern

Posted by Mohit Sharma 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Priyanka Malik 7 years, 1 month ago

Contact cbse site

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What are ligands?

Posted by Badal Yadav 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Jaspreet Choudhary 7 years, 1 month ago

Ligand are the atom,moleculesor ions which donate lone pair of electrons to central atom and form a coordinate bond with it .

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Potential of hydrogen electrode at 1 atm and 25° is 0.118v calculate the ph of solution

Posted by Neha Gupta 7 years, 1 month ago

CBSE > Class 12 > Chemistry

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Name the member of the lanthanoid series which is well known to exhibit +4 o.s

Posted by Badal Yadav 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Neha Yadav 7 years, 1 month ago

Cerium .

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Convert phenol to benzyl alcohol

Posted by Gaurav Singh 5 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Saloni S 7 years, 1 month ago

First treated with zinc to form benzene then treated with ch3cl to form toluene . react toluene with cl2 and then NaOh to form benzyl alcohol .

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Why tertiary alcohol is more reactive than primary and secondary give reason.

Posted by Aman Khan 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 7 years, 1 month ago

Tert-alcohols form stable tertiary carbocation intermediates. These are more stable than primary or secondary due to the inductive effect(+I effect of alkyl groups). They generally come from alcohols with alkyl groups attached, so these groups tend to 'break off' more easily, hence a more reactive molecule

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Why a soln. of chloroform and acetone shows negative deviation from raoults law

Posted by Badal Yadav 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Deepa Singh 7 years, 1 month ago

The hydogens in chloroform get bonded (hydogen bonding)to the oxygen of the carbonyl group of acetone , so both of the compounds are associated with hydrogen bonding which decreases the capacity of their escaping , thus forming less vapour ,--- exerting less vapour pressure than what is expected from pure indivisaul compunds in Raults law.

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What is coordination compounds

Posted by Badal Yadav 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

E S 7 years, 1 month ago

Compound which coordinate as well as ionic bond is present

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Although heavier than N2 or O2 why CO2 doesn't form lower layer in atmosphere

Posted by Amit Arora 7 years, 1 month ago

CBSE > Class 12 > Chemistry

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What is crystal defect ?

Posted by Samrat Sarkar 7 years, 1 month ago

CBSE > Class 12 > Chemistry

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Does catalyst takes part in reaction or not

Posted by Arunendra Singh 7 years, 1 month ago

CBSE > Class 12 > Chemistry

4 answers

Joshua M 7 years, 1 month ago

Yeah. Catalyst take part in a chemical reaction.. But when you compare initial and final stage their composition remain unchanged. So they say catalyst don't take part in a chemical reaction

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Sandeep Singh 7 years, 1 month ago

Yes but they revers back as iodine in iodination

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Koi Koi 7 years, 1 month ago

No catalyst only enhance the rate of reaction

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Richa Sharma 7 years, 1 month ago

Not

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Ionic solid conduct electricity in molten state but not in solid state. Why?

Posted by Ankit Mishra 7 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Koi Koi 7 years, 1 month ago

Because in solid state ions are not free to move due to electrostactic force of attraction between the constituents particles While I molten state ions are free to move so they conduct electricity

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Rakshit Negi 7 years, 1 month ago

because in molten state or aquous state they have free ions and thus they conduct electricity while in solid state...they are electrical insulator due to absense of free ions.

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Where is" Millon's Base" in ncert chemistry ? Please help

Posted by Md. Taufique Ashraf 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Aisha Gupta 7 years, 1 month ago

No it is in practical a test of ammonia called nesller reagent test the product you got after reacting ammonia with nesllar reagent K2HgI4 is called iodine of millions base

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Which noble gas has the lowest boiling point?

Posted by Ashwini M Gupta 7 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Abhishek Mavi 5 years, 8 months ago

Helium

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Ashwini M Gupta 7 years, 1 month ago

Helium [He]

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How do metallic and ionic substances differ in conducting electricity

Posted by Vinay Gupta 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Ajay Yadav 7 years, 1 month ago

Ionic compound do not conduct electricity unless they are in molten form or dissolved in solution. but metal can conduct electricity in the solid state

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the fact that pine oil is used in froth flotation methods

Posted by Sunny Dhîmàñ 7 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Abhay Singh Tomar 7 years, 1 month ago

Pine oil wets the ore

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Mithra Mithra 7 years, 1 month ago

Pine oil is used in froth flotation because mineral particles is mixed with oil only.

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How do emulsifier stabilise emulsion

Posted by Saurabh Kumar 7 years, 1 month ago

CBSE > Class 12 > Chemistry

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What is hardy schulze rule.

Posted by Garima Chauhan 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Ajay Yadav 7 years, 1 month ago

This observation of Hardy and Schulze are known as Hardy Schulze law. It can be defined as: Greater is the valency of the oppositely charged ion of the electrolyte being added, the faster is the coagulation. The idea behind this is the attractive electrostatic forces between ions of opposite charges.

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why amine is basic in nature

Posted by Gaurav Kumar 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Yuvraj Sharma 7 years, 1 month ago

Because amine has lone pair and it behave as Louis base

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Tungsten crystallizes in bcc.if edge of unit cell is 316.5pm. what is radius of the tungsten?

Posted by Himanshu Suryawanshi 7 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

E S 7 years, 1 month ago

Use formula r=√3/4*a

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Why fructose gives a positive test with tollens and fheliing solution

Posted by Prashant Sharma 7 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

E S 7 years, 1 month ago

Becoz due to presence of anomeric OH at C1

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Sagar Sagar 7 years, 1 month ago

hhi

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What is smile?

Posted by Richie Rich 7 years, 1 month ago

CBSE > Class 12 > Chemistry

3 answers

Richa Sharma 7 years, 1 month ago

??✌

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Richa Sharma 7 years, 1 month ago

☺️ The simplified molecular input line entry system(smiles) is a specification in form of a line notation for describing the structure of chemical species using short ASCII strings.?

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Shobha??? Kumari 7 years, 1 month ago

Smile ????? in chemistry???

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How many naming reaction in class 12 organic chemistry

Posted by Hv Charan 7 years, 1 month ago

CBSE > Class 12 > Chemistry