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Dipole moment of cholorobenzene is lower than that of cyclohexylchloride

Posted by Venkat Kishore 6 years, 4 months ago

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A cube-shaped crystal of an alkali metal, 1.62 mm on an edge, was vaporized in a 500.0 mL evacuated flask. The resulting vapor pressure was 12.5 mm Hg at 802 °C. The structure of the solid metal is known to be body-centered cubic. (a) What is the atomic radius of the metal atom in picometers? (b) Use the data in Figure on page 88 to identify the alkali metal. (c) What are the densities of the solid and the vapor in g/cm3?

Posted by Vipulbhai Kalsariya 6 years, 4 months ago

CBSE > Class 12 > Chemistry

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Find the normality of 21.5 gram of ethanoic acid (CH3COOH) in 75 mililiter of solution

Posted by Ajay Lal 6 years, 4 months ago

CBSE > Class 12 > Chemistry

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Calculate the volume of 80% H2SO4 by weight (D=1.80gm per ml) required to prepare 1 litre of 0.2 molarity H2SO4??

Posted by Aman Singh 6 years, 4 months ago

CBSE > Class 12 > Chemistry

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Cells are not in watches?

Posted by Diksha Ingle 6 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Gurman Kaur 6 years, 4 months ago

Watches have primary cell

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Tanvi Toor 6 years, 4 months ago

Yes, watches have cells

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Define Glyptal polymer .

Posted by Jasmine Jasmine 6 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Divya Garg 6 years, 4 months ago

Monomer of glycine nd amino caproic acid

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Decreasing order of solubility in water of halogens

Posted by Shruti Koli 6 years, 4 months ago

CBSE > Class 12 > Chemistry

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What is chromatography

Posted by Abhay Kasaudhan 6 years, 4 months ago

CBSE > Class 12 > Chemistry

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Sidra Raza 6 years, 4 months ago

A technique for the separation of a mixture by passing it in solution or suspension through a medium in which the components moves at different rates

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How henrys law diffrent from raults law

Posted by Adarsh Singh 6 years, 4 months ago

CBSE > Class 12 > Chemistry

3 answers

Tevar Jaat 6 years, 4 months ago

1-Henry law is applicable only for gaseous solute but Raults law is applicable for all types of solute (solid, liquid or gas). 2-1-Henry law is applicable only for gaseous solute but Raults law is applicable for solute as well as solvent..

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Aakash Poddar 6 years, 4 months ago

Difference in only proportionately constant

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Anu A 6 years, 4 months ago

The main difference between Henry’s Law and Raoult’s Law is that Henry’s law describes the behavior of solutes of a solution whereas Raoult’s law describes the behavior of solvent in a solution.

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Complete the following reaction 1)XeF4+O2F2----- 2)XeF2+H2O------- 3)Fe+H2O----- 4)XeF4+H2O---- 5)F2+Cl2---- 6)XeF4+SbF5-----

Posted by Mansi Vasava 6 years, 4 months ago

CBSE > Class 12 > Chemistry

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On what factor does vapour pressure of liquid depends

Posted by Prakshita Solanki 6 years, 4 months ago

CBSE > Class 12 > Chemistry

4 answers

Tanvi Toor 6 years, 4 months ago

Temperature

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Deepak Jindal 6 years, 4 months ago

Temperature

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Khush Soni 6 years, 4 months ago

Temperature Inter-molecular forces (Nature of liquid)

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Aryaman Choudhary 6 years, 4 months ago

Temperature

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N type अर्ध चालक और p type चालक क्या है.?

Posted by Hulesh Kurre 6 years, 4 months ago

CBSE > Class 12 > Chemistry

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Tanvi Toor 6 years, 4 months ago

It is basically negative and positive type of semiconductor

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What is the IUPAC name of the product formed when Propan-2-ol reacts with H2SO4 at 413K???

Posted by Preetinder Garcha 6 years, 4 months ago

CBSE > Class 12 > Chemistry

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Difference between colloids and emulsions ....and explain colloids in easy way and how they are differenr from solutions

Posted by Priya Priya 6 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Adarsh Singh 6 years, 4 months ago

When one substance dispersed within the other it is called colloids For colloids the particle siz 1-1000 nm Emulsion is the colloidal solution in which both dispersed phase and dispersed medium are liquids

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Relation between molarity and molality

Posted by Anuj Sharma 6 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 6 years, 4 months ago

Molarity=(no of moles of solute)/(volume of solution in litrs)

while molality=(moles of solute)/(wt of solvent in kg)

the above two have a relationship as-

molality= Molarity/(density of solution-Molarity*molecular wt of solute)

m = M / (ρ - M x mw A)

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If N2 gas is bubble through water at 298k how many milimoles of N2 gas would dissolve in 1 litre of water? Assume that N2 exerts a particle pressure of.987 bar.Given that Henry's law constant for N2 at 298 k is 76.48 kbar

Posted by Pramisha Gewali 6 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Sia ? 6 years, 4 months ago

Let the number of mole of N₂ dissolved in water be n
Henry’s law constant for N₂ at 293 K is 76.48 kbar.
according ti henrys law
partial pressure exerted by N₂=Kh*x
x is the mole fraction
mole fraction of N₂=x/(x+55.5)
.987=76.48*10^3 *x/(x+55.5)
x=.7 milimole

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What is common name of 2,3-dihydrobutandioic acid?

Posted by Sajid Ali 6 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Sia ? 6 years, 4 months ago

r-Weinsaure (r)-tartaric acid

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How to convert from But-1-ene to But-2-ene?

Posted by Sajid Ali 6 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Anu A 6 years, 4 months ago

CH3-CH2-CH=CH2 +HBr---> CH3-CH2-CH(Br)-CH3 This reaction happens according to Markonikoffs rule Now reacting this with alcoholic KOH gives alkenes CH3-CH2-CH(Br)-CH3 + KOH (alc)——-> CH3CH=CHCH3 + KBr + H2O

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Colloidal solution

Posted by Rishita Shishir ?✏ 6 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 6 years, 4 months ago

A colloid is a heterogeneous mixture whose particles are not as small as solution but they are so small that cannot be seen by naked eye. When a beam of light is passed through a colloid then the path of the light becomes visible. For example milk, smoke etc

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how to make NH3

Posted by Karan Gupta 6 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Anoop Yadav 6 years, 5 months ago

By haber's process N

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What is emulsion?

Posted by Sshhs Jsjs 6 years, 5 months ago

CBSE > Class 12 > Chemistry

2 answers

Aryaman Choudhary 6 years, 4 months ago

It is a solution of two immissible liquid Oil in water Water in oil

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Tanvi Toor 6 years, 5 months ago

It is the colloidal solution of two immissible solutions in which both the disperse phase nd dispersion medium are liquids....?

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What is the necessity to use a salt bridge to use in a galvanic cell?

Posted by Wang Dorjee 6 years, 5 months ago

CBSE > Class 12 > Chemistry

4 answers

Gurman Kaur 6 years, 4 months ago

It maintains neutrality and offcorse prevent mixing of ions

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Arpita Tiwari 6 years, 4 months ago

It completes the circuit

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Ãnûrag? Pärašhař??? 6 years, 5 months ago

It exchange ions without intermixing the soln

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Tanvi Toor 6 years, 5 months ago

It prevents the two solutions from mixing with each other.

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What is z in w=ZIT in electrochemistrg

Posted by Abhishek Kumar Yadav 6 years, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Sajid Ali 6 years, 5 months ago

Z is electro chemical equivalent i,e z=E/96500 , where E is equivalent mass.

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Can zinc sulphate be kept in copper vessel?

Posted by Shreya Kumari 6 years, 5 months ago

CBSE > Class 12 > Chemistry

4 answers

Cute Chhora Aman 6 years, 5 months ago

Yes aboloutly

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Tanvi Toor 6 years, 5 months ago

Yes

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Jaat Sahil 6 years, 5 months ago

Yes

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Om Singh 6 years, 5 months ago

Yes zinc sulphate can be stored in copper vessel because according to reactivity series metals zinc is more reactive than copper. But the other way round is possible ex. zinc can displace copper form copper sulphate.

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What is acetylation reaction

Posted by Sachin Sd Dixit 6 years, 5 months ago

CBSE > Class 12 > Chemistry

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What is Rosenmond reaction

Posted by Priyanshu Raj 6 years, 5 months ago

CBSE > Class 12 > Chemistry

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How to calculate the C6H6O2

Posted by Srishti Singh 6 years, 5 months ago

CBSE > Class 12 > Chemistry

4 answers

Om Singh 6 years, 5 months ago

110

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Ɽøⱨł₮ ₲Ʉ₱₮₳ 6 years, 5 months ago

12x6+1x6+16x2= 110g mol.^1 right ans niche wala glucose ka h

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Ɽøⱨł₮ ₲Ʉ₱₮₳ 6 years, 5 months ago

180g mol.^1

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Gursharn Kaur 6 years, 5 months ago

what

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What are hydro alkynes?

Posted by Himangshu Barman 6 years, 5 months ago

CBSE > Class 12 > Chemistry

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What is ment by ''reverse osmosis''?

Posted by Bipen Singh 6 years, 5 months ago

CBSE > Class 12 > Chemistry

5 answers

Abhishek Kumar Yadav 6 years, 5 months ago

From lower concentration to higher concentration of solvent अंडर the application of ext force

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Gursharn Kaur 6 years, 5 months ago

Reverse osmosis is a process in which the direction of osmosis gets reversed it occurs when an osmotic pressure is applied to it

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Yogita Ingle 6 years, 5 months ago

Reverse osmosis

As the name suggests Reverse Osmosis is just the reverse process of Osmosis. Osmosis can occur naturally whenever there is a difference in concentration between the two solutions. But reverse osmosis takes place only when external energy is applied to the more saline solution.
Application of larger osmotic pressure to the solution side reverses the direction of osmosis.
This phenomenon makes the pure solvent flow out of the solution through the semi permeable
Reverse osmosis is extensively used in desalination of sea

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Rajdeep Kaur 6 years, 5 months ago

When the pressure applied to the solution is higher then osmotic pressure then the solvent from solution goes towards pure solvent through semi permeable membrane this is called reverse osmosis

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Himangshu Barman 6 years, 5 months ago

When osmosis is reversed it is known as reverse osmosis

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Stereo isometric and there type

Posted by Nitika Yadav 6 years, 5 months ago

CBSE > Class 12 > Chemistry