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KCN being ionic in nature have unequal distribution of electron b/w K and C .as a result C have extra lone pair of electron which it donate to alkyl part forming alkyl cyanide . whereas AgCN is covalent in nature due to which C does not have lone pair of electron . as a result N having a lone pair of electron donate it to alkyl part forming isocyanides

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Pooja Sharma 7 years, 5 months ago

AgCN is covalent in nature

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What is resonance

Posted by Prateel Bhadoriya 7 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Rishabh Sahu 7 years, 5 months ago

Resonance effect describes the case when there are more than one possible molecular structures possible for the given molecular formula ( canonical structures) but none of them actually describe the molecule totally correct. This is due to delocalisation of π electrons. The physical properties of the actual compound show intermediate characteristics of these canonical structures. Eg bond length of all C-C bonds of benzene in its canonical structure is different , single bond longer than double bond. But actual experimentally determined data through spectroscopy shows that all C-C bond lengths are equal . Thus a single canonical structure is incorrect and a mixture that js a hybrid of those canonical structures is used to describe the molecule know as resonance hybrid.

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22gm of co2 is added to 500ml of H2o to form solution who kh is equal to 0.25 * 10power 4 findi out the partial pressure applied by co2

Posted by Shivam Verma 7 years, 5 months ago

CBSE > Class 12 > Chemistry

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An aqueous solutionof hcl and density of 1.02 gm-3. The numerical values of molarity , molality and mole fraction of water respectively are

Posted by Sonam Bhutia 7 years, 5 months ago

CBSE > Class 12 > Chemistry

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important question of p block

Posted by Ashu Kumar 7 years, 5 months ago

CBSE > Class 12 > Chemistry

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Preet Kumar 7 years, 5 months ago

why are halogens coloured?

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Calculate oxidation state of each atom. In h2so4

Posted by Pankaj Singh 7 years, 6 months ago

CBSE > Class 12 > Chemistry

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Shaista Parveen 7 years, 5 months ago

Hydrogen has 2 Sulphur has 6 Oxygen has -8

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Calculation of ch 3 question 3.4

Posted by Yushma Shorrof 7 years, 6 months ago

CBSE > Class 12 > Chemistry

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What is the self aldol condensation of 2 molecules of proponal

Posted by Xxxx X 7 years, 6 months ago

CBSE > Class 12 > Chemistry

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Rishabh Sahu 7 years, 5 months ago

Self means the one propanal molecule react with another molecule of the same type ie another propanal molecule. The c adjacent to carbonyl group attach to Carbonyl carbon of 2nd molecule whose doubly bonded O first convert to OH then gets removed as a result of heating . Hence you get 2 methyl 3ene pent 2one

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What is surface tension

Posted by Achu Ts 7 years, 6 months ago

CBSE > Class 12 > Chemistry

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Azmat Ali 7 years, 6 months ago

Surface tension is the force acting on the surface , 1cm along the surface of liquid.

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Fuel cells

Posted by Umer Umer 7 years, 6 months ago

CBSE > Class 12 > Chemistry

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Pinky Verma 7 years, 6 months ago

The cells which run on fuel , which needs fuel to complete it's function

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Why is product when d-glucose with conc react with con hno³

Posted by Pankaj Vats 7 years, 6 months ago

CBSE > Class 12 > Chemistry

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explain deviation of real solutions from raoult's law

Posted by Narayan Kashyap 5 years, 8 months ago

CBSE > Class 12 > Chemistry

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solved ncert intext question all chapter

Posted by Narayan Kashyap 7 years, 6 months ago

CBSE > Class 12 > Chemistry

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What are all the mechanisms in organics chemistry class 12

Posted by Anshika Bhardwaj 7 years, 6 months ago

CBSE > Class 12 > Chemistry

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When and why is molality preferred over molarity in handling solutions in chemistry?

Posted by Rashmil Mardi 7 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Sourav Thakur 7 years, 6 months ago

Molality is preferred over molarity in chem because their is no effect of temperature in molality. It does not change with temp. Because it repent upon mass of solvent (molality is equal to no. Of moles of solute /mass of the solvent in kg). Their is no effect of temp. on mass. Where as molarity is change because molarity is depend upon volume of solution (molarity is equal to no. Of moles of solute /volume of solution in litre ).volume is change with temp.

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2 liquids A and B form ideal solution . one mole of A and B both are mixed to form a solution . now 1 mole of the mixture has been vapourise. calculate vapour pressure of the solution at this point. P0A- 900 torr P0B=100 Torr

Posted by Abhinav Kumar 7 years, 6 months ago

CBSE > Class 12 > Chemistry

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Distinguish test between Tollens' reagent and Fehling's reagent.

Posted by Jagrav Sharma 7 years, 6 months ago

CBSE > Class 12 > Chemistry

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Potassium methyl xanthate structural formula and IUPAC name

Posted by Shruti Tiwari 7 years, 6 months ago

CBSE > Class 12 > Chemistry

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Rishabh Sahu 7 years, 5 months ago

I think it's best to type it on google search.

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Increase in temperature decreases the volume

Posted by Kapil Sharma 7 years, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

Harsh Saini 7 years, 6 months ago

Yes its a property of water before 4C temperature

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Pooja Sharma 7 years, 6 months ago

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i want to choose a working project for my 12th class practical. what can be best for it?actually i want to have an effective viva. it must be from 12th class syllabus.

Posted by Yogshikha Yadav 7 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Shubham Sharma 7 years, 6 months ago

Adulteration of food

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Configuration of mg

Posted by Prashant Bhagri 7 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Dark Embelem 7 years, 6 months ago

1s2 2s2 2p6 3s2

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What is the significance of Henry's Law

Posted by Yo Yo Honey Singh ? 7 years, 6 months ago

CBSE > Class 12 > Chemistry

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Himanshi Lingwal 7 years, 6 months ago

Cylinders carrying by scubadivres are filled with helium.instead of nitrogen because it is less soluble in blood Softdrinks are filled with co2 with high pressure to increase their solubility

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Can we convert benzaldehyde to benzophenone using Ca(OH)2

Posted by Muskan Aggarwal 7 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Manan Bedi 7 years, 6 months ago

Yes

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What is semiconductors describe its two types

Posted by Shubhangi Arya 7 years, 6 months ago

CBSE > Class 12 > Chemistry

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Sourav Thakur 7 years, 6 months ago

These are a substance which allows to pass electricity more than insulators and less than conductor. These are of two types 1 p-type semi conductors 2 n-type semi conductors

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it was found that the solution of a sugarcane in water was hydrolysis to the extent of 25% in 60 minutes calculate the time taken for the sugar to be 50% hydrolysed assuming that the reaction for first order.

Posted by Saloni S 7 years, 6 months ago

CBSE > Class 12 > Chemistry