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

Calculate molar conductivity by using the formula Δm=k*1000/M And then divide molar conductivity by the valency factor of h2so4 Valency factor of h2so4 is 2 U will get ur answer

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Why bond angle in pH4+ is higher than that in PH3?

Posted by Sagar Hansda 3 years, 8 months ago

CBSE > Class 12 > Chemistry

2 answers

Sagar Hansda 3 years, 8 months ago

Thanks

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Manish Soni 3 years, 8 months ago

The bond pair lone pair repulsion in pH3 higher than PH4.

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What is the shape of co-ordination compounds in which C.N of central metal ion is 4

Posted by Pooja Wagh 3 years, 8 months ago

CBSE > Class 12 > Chemistry

4 answers

Diksha Garg 3 years, 8 months ago

Tetrahedral or trigonal planner geometry and shape tetrahedral

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Nitish Kumar 3 years, 8 months ago

Name to likho

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Vivek Chaurasia 3 years, 8 months ago

Aaga ? and ??

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Pooja Wagh 3 years, 8 months ago

And

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A solid on slight heating melts and not conducts heat and electricity.predict the type of solid.

Posted by Amrutha S Amrutha S 3 years, 8 months ago

CBSE > Class 12 > Chemistry

2 answers

Anitesh Sana 3 years, 8 months ago

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Ninisha Mandal 3 years, 8 months ago

Non polar molecular solid

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Crystalline solid

Posted by Shiva Yadav 3 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Ankur Yadav 3 years, 7 months ago

Solids in which constituent particals are arranged in a particular pattern in 3D space

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Standard electrode potential value di hogi exam mein?... Yaa yaad kerke jaani hai?

Posted by Riya Gandhi 3 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Ayush Juyal 3 years, 8 months ago

Yes given

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ANSWER

Will the standard electrode potential values be given in exam?

Posted by Riya Gandhi 3 years, 8 months ago

CBSE > Class 12 > Chemistry

2 answers

Drishty Kamboj 3 years, 8 months ago

Its not always given and the reaction is given instead ....so Ecathode -Eanode .....yeah now you should have to distinguish bw cathode and anode with the help of reaction

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Khushvendra Gautam 3 years, 8 months ago

it is given question I advice you to remember the sequence of series .

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Which reaction are reduced in d and f block elements

Posted by Hritik Yadav 3 years, 8 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

P block ke reduced syllabuses me "preparations and properties of halides and oxacids (elementary idea) " remove kiya h toh ye topic kaun sa h koi bta skta h ??? i am so confused about this topic? Kya ye topic h issh chapter me?

Posted by Gungun Gupta?? 3 years, 8 months ago

CBSE > Class 12 > Chemistry

5 answers

Drishty Kamboj 3 years, 8 months ago

Phosphorus wala whole topic remove ho chuka hai?

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Gungun Gupta?? 3 years, 8 months ago

Kya halogen group ko hi halides kehte h

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Suman Agrawal 3 years, 8 months ago

Mtlb isse b questions aa skte h

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Suman Agrawal 3 years, 8 months ago

Lekin iska sirf elementary idea hi remover hua h

1Thank You

Suman Agrawal 3 years, 8 months ago

Han ye topic h

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Aniline to bromobenzene

Posted by Veerbhan Singh 3 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Hritik Yadav 3 years, 8 months ago

Aniline + hno2 =diazonium salt +cu2br2=bromobenzene

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Is it beneficial to study from examidea for chemistry

Posted by Gaurav Bagga 3 years, 8 months ago

CBSE > Class 12 > Chemistry

2 answers

Hritik Yadav 3 years, 8 months ago

Ncert is enough but you have to learn it by heart

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Vivek Chaurasia 3 years, 8 months ago

Yes ofcourse bhai.. You should solve PYQ..

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(a) Adsorption of a gas on surface of solid is generally accompanied by a decrease in entropy, still it is a spontaneous process. Explain. (b) Some substances can act both as colloids ’ and crystalloids. Explain. (c) What will be the charge on Agl colloidal particles when it is prepared by adding small amount of AgNO3 solution to KI solution in water ? What is responsible for the development of this charge ?

Posted by Diksha Hans 3 years, 8 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Explain why the boiling points of isomeric haloalkanes decrease with increase in branching.

Posted by Chandan Yadav 3 years, 8 months ago

CBSE > Class 12 > Chemistry

2 answers

Hritik Yadav 3 years, 8 months ago

Because number of branches increase due to which surface area decrease as a result van der wall's forces also becomes weaker and hence boiling point decreases.

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Gaurav Bagga 3 years, 8 months ago

Because the extent of hydrogen bonding decreases because of which boiling point decreases

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Ambident nucleophiles explain with example

Posted by Meenu Garg 3 years, 8 months ago

CBSE > Class 12 > Chemistry

3 answers

Saloni Kaushik 3 years, 8 months ago

A ligand which has more than one donor but can use only one at a time FOR example -CN (Cyano)C can donate -NC (Isocyano)N can donate

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Ankit Gautam 3 years, 8 months ago

The molecules or nucleophiles which has two attacking sites are called ambident nucleophiles. Ex CN, NO2 etc.

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Shweta? Dhama? 3 years, 8 months ago

The nucleophile that can attack through two different site are called ambident nucleophile....for example..cyanide...it can attack through either C atom or N atom to form alkyl isocyanide or alkyl cyanide.....hope soo it helps u....

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Why ice floats over the surface of water

Posted by Monika Malviya 3 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Bhavya Mishra 3 years, 8 months ago

Because ice has less mass as compared to water and so it floats

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What is the order of the acidic strength of haloalkanes,alcohols,phenols,ethers,carboxylic acid, ketone and aldehyde

Posted by Khushi Singh 3 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Brateen Das Adhikari 3 years, 8 months ago

Carboxylic acid>phenol>alcohol>aldehyde>ketone>ether>haloalkanes

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Distinguish between ethylamine and aniline.

Posted by P....... ........ 3 years, 8 months ago

CBSE > Class 12 > Chemistry

2 answers

Shweta? Dhama? 3 years, 8 months ago

aniline can give test of coupling reaction while ethylamine doesn't give.....hopee soo it helps u

1Thank You

Brateen Das Adhikari 3 years, 8 months ago

Reaction with NaNO2 + HCl. Ethyl amine forms ethanol whereas aniline forms diazonium salt.

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Ortho para dichloro toluene

Posted by Yashwant Shriwas 3 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Anurag. Zinzaniya 3 years, 8 months ago

Chlorine on ortho & para position also have CH3 on second para position on benzene

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Project to study the acidity of different sample of tea leaves

Posted by Kasif Alam 3 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Brateen Das Adhikari 1 year, 10 months ago

Go search google

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What is transition series

Posted by Rajesh Sharma 3 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Karanbir Singh 3 years, 8 months ago

In which series the no. Of electron is increase in their d block in period wise . Sc -----------zn increase electon in their d - block then they fully filled their last orbit sc to zn ni series.

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What do you mean by zeta potential??

Posted by Anchal Sharma 3 years, 8 months ago

CBSE > Class 12 > Chemistry

4 answers

Anchal Sharma 3 years, 8 months ago

Thank you yrr

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Anurag. Zinzaniya 3 years, 8 months ago

The potential difference develops b/w two oppositely charged layer is called zeta potential

3Thank You

Shweta? Dhama? 3 years, 8 months ago

It may be defined as the potential difference between the fixed layer and the diffused layer....

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Dhruv Kumar 3 years, 8 months ago

Zeta potential is the charge that develops at the interface between a solid surface and its liquid medium.

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I have to make project file for class 12 boards ..... Can i make project on *contents of cold drink*? .....as biomolecule has been reduced from syllabus this year

Posted by Ankita Kumari 3 years, 8 months ago

CBSE > Class 12 > Chemistry

2 answers

Saloni Kaushik 3 years, 8 months ago

Go for chocolate analysis?

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Dhruv Kumar 3 years, 8 months ago

Better to make a project on foods based experiment with sugar (study the foods and effect due to sugar).

1Thank You

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Acidic character increases from HF to HI

Posted by Gaurav Bhoria 3 years, 8 months ago

CBSE > Class 12 > Chemistry

2 answers

Gaurav Bagga 3 years, 8 months ago

Down the group reducing character increased hence acidity also increases

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Brateen Das Adhikari 3 years, 8 months ago

Due to increase in atomic size of anion, thus weaker the bond, easier the release of proton.

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Methyl magnesium chloride react with ethyl alcohol

Posted by Suraj Kumar 3 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Brateen Das Adhikari 3 years, 8 months ago

CH3CH2-OMgCl + CH4

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Both double salts as well as complexes are formed by the combination of two or more stable compounds in stoichiometric ratio. However, they differ from cach other. Study the following differences between a double salt and a complex. A double salt is a compound prepared by the combination of two different salt compounds Completely dissociate into its ions in water Give simple ions when added to water Can casily be analyzed by determining the ions present in the aqueous solution A complex salt is a compound composed of a central metal atom having coordination bonds with ligands around it Do not completely dissociate into its ions in water Do not give simple ions Cannot be easily analyzed by determining the ions in the aqueous solution (a) Give an example each of a double salt and a complex. (b) Is K[Fe(CN),] a double salt ? (c) Write the hybridization of Fe in K [Fe(CN),]. (d) What is the oxidation state of Fe in K[Fe(CN)] ? (e) Write the name and composition of the double salt formed by the combination of FeSO, and (NH,),SO,

Posted by Chirag Chouniyal 3 years, 8 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Project work

Posted by Rizwan Khan 3 years, 8 months ago

CBSE > Class 12 > Chemistry

3 answers

Vivek Chaurasia 3 years, 8 months ago

Yes rizwan,there is a many of topics in our syllabus you can choose any one of them and make full details to that topic. The topics are colloid (I'm also make this topic in project work), adsorption, frendulich exp, galvanic cell etc.... Many of them yrr??

1Thank You

Thimmappa Udava 3 years, 8 months ago

Which project

1Thank You

Yashwant Kushwah 3 years, 8 months ago

How make project

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ANSWER