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A 20 litre container at 400k contains CO2 at pressure 0.4 ATM and an excess of SrO neglect the volume of solid SrO the volume of container is now decreased by moving the movable Piston fitted in the container the maximum value of container when pressure of CO2 attains it maximum value will be

Posted by Tiger Don 7 years, 7 months ago

CBSE > Class 11 > Chemistry

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A 20 litre container at 400k contents SO2 at pressure 0.4 ATM and an excess of s r o neglect the volume of solid is the volume of container is now the screen by moving the movable Piston fitted in the container the maximum value of the container when pressure of Co2 attains maximum value will be

Posted by Tiger Don 7 years, 7 months ago

CBSE > Class 11 > Chemistry

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Plz post the structure of nylon6,6

Posted by Swastik Mukherjee 7 years, 7 months ago

CBSE > Class 11 > Chemistry

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The number of atoms in 4.25g of NH3 is approximately?

Posted by Supriyo Mukherjee 7 years, 7 months ago

CBSE > Class 11 > Chemistry

1 answers

Ďãřşháñăã Yadav???✊ 7 years, 7 months ago

Molar mass NH3 = 14+3 = 17g/mol 4.25g = 4.25/17 = 0.25 mol NH3 1mol = 6.022*10^23 molecules 0.25 mol = 0.25*6.022*10^23 Number of molecules = 1.51*10^23 molecules NH3

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Which institute is best for coaching for class 11???

Posted by Manika Gupta 7 years, 7 months ago

CBSE > Class 11 > Chemistry

3 answers

. . 7 years, 6 months ago

Helix or allen

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Nishita Tomar 7 years, 7 months ago

Ofcourse the stream is science

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Rohan Saini 7 years, 7 months ago

Stream

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in harber's process,30L of dihydrogen is and 30L of dinitrogen were taken for reaction which yielded only 50%of the expected product.what will be the compostion of the gaseous mixture under

Posted by Gunjan Singla 7 years, 7 months ago

CBSE > Class 11 > Chemistry

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When hydrogen is combustible and oxygen is supporter of combustion then why water is used for detect fire?

Posted by Charu Srivastava 7 years, 7 months ago

CBSE > Class 11 > Chemistry

1 answers

Abhinav Kumar Jha 7 years, 7 months ago

Compounds do not show properties of their constituent substances.

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In an atom for how many electrons the quantum no. Will be n=3,l=2,m=+2,s=+1/2

Posted by Rohan Saini 7 years, 7 months ago

CBSE > Class 11 > Chemistry

5 answers

Aman Kumar 7 years, 7 months ago

Therfore, total no.of electron =5

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Aman Kumar 7 years, 7 months ago

Listen , it does'nt required any solving method. We know, l=2 that means, m = -2,-1,0,+1,+2 Given that , m= +2 i.e electron will be placed in (+2 )subshell. Here, S= +1/2 (which shows that electron is unpaired.) Therefore, we put electron to each subshell then we get , 5 electron. i.e. -2=1 electron (+1/2) -1=1 electron (+1/2) 0=1 electron (+1/2) +1=1 electron(+1/2) +2=1 electron(+1/2) So, m= +2 , s=+1/2 given, Total electron in it is 1 . Hope u understand.

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Rohan Saini 7 years, 7 months ago

But how to solve it

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Navneet Singh 7 years, 7 months ago

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Aman Kumar 7 years, 7 months ago

No. Of electron will be 5.

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Atomic masses of all the elements

Posted by Noopur Kumari 7 years, 7 months ago

CBSE > Class 11 > Chemistry

1 answers

Ďãřşháñăã Yadav???✊ 7 years, 7 months ago

given in 9th class refresher..

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Define diagonal relationship

Posted by Ishika Dey 7 years, 7 months ago

CBSE > Class 11 > Chemistry

1 answers

Ďãřşháñăã Yadav???✊ 7 years, 7 months ago

A diagonal relationship is said to exist between certain pairs of diagonally adjacent elements in the second and third periods of the periodic table.

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Which orbital we fill after 6s2 ? If your answer is 4f then see the e.c. of lanthanum

Posted by Sourav Sharma 7 years, 7 months ago

CBSE > Class 11 > Chemistry

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what mass of HCL react with 2.98 gram of MnO2.

Posted by Bidhan Supakar 7 years, 7 months ago

CBSE > Class 11 > Chemistry

1 answers

Anushka Gautam 7 years, 7 months ago

Question is not correct maybe

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aq. solution of H2so4 is 30% by mass. find molality of solution and mole fraction of H2So4.

Posted by Bidhan Supakar 7 years, 7 months ago

CBSE > Class 11 > Chemistry

1 answers

Aman Kumar 7 years, 7 months ago

30 g of H2so4 present in 100 g of solvent. ( mass of solvt.=100-30) Molality = wt. of solute ×1000/molecular wt. Of solute × wt. of solvent. = 30 ×1000/98 × 70 =1500/343 M=4.37... 2 nd part, No.of moles of H2so4= 30/98=0.30 No.of moles of Water= 100/18=5.55 Therefore, Mole fraction= 0.30/0.30+5.55 =0.30/5.85 =0.051.... Ans.

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10 gram of fe react with 10 gram of O2 in a vessel how many gram of fe2o3 is formed which is the limiting reagent.

Posted by Bidhan Supakar 7 years, 7 months ago

CBSE > Class 11 > Chemistry

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What is polarisation?

Posted by Shivani Jha? 7 years, 7 months ago

CBSE > Class 11 > Chemistry

2 answers

Shivani Jha? 7 years, 7 months ago

Thanks

1Thank You

Shreya Singh 7 years, 7 months ago

The partial or complete polar separation of the positive or negative electric charges in a nuclear, atomic, molecular,or chemical system.

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what schrodinger wave equation in the briefest possible form?

Posted by Lakshita Singh 7 years, 7 months ago

CBSE > Class 11 > Chemistry

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Why the Lyman series are ultraviolet and paschen , brackett and pfund are infrared?

Posted by Diksha Gupta 7 years, 7 months ago

CBSE > Class 11 > Chemistry

1 answers

Aman Kumar 7 years, 7 months ago

Lyman series is the ground state energy level which is below the balmer series and balmer series are visible,that is why lyman are ultraviolet. . All the paschen, brackett and p -fund energy levels are above the balmer series . Therefore, they are Infrared .

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Why in a chemical reaction sulphur is written as s2 not s8?

Posted by Mitali Das 7 years, 7 months ago

CBSE > Class 11 > Chemistry

3 answers

Sarika Kamboj 7 years, 7 months ago

Sorry ,she

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Sarika Kamboj 7 years, 7 months ago

He is asking about the diff. Compounds of Sulphur not it's E.C

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Tripti Sharma 7 years, 7 months ago

As 's' has only 1 orbital and we know that 1 orbital can hold a maximum of 2 electrons in it.

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Calculate the mass of photon with wavelength 3.6Å ?

Posted by Saransh Gupta 7 years, 7 months ago

CBSE > Class 11 > Chemistry

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what volume of 0.1 M HCL is diluted to 500 ml and 0.25 M HCL solution.

Posted by Bidhan Supakar 7 years, 7 months ago

CBSE > Class 11 > Chemistry

2 answers

Tripti Sharma 7 years, 7 months ago

1.25 litre answer is coming

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Tripti Sharma 7 years, 7 months ago

Use the formula M1 V1 = M2 V2

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Define gay-lussac's law

Posted by Harsh Jaiswal 7 years, 7 months ago

CBSE > Class 11 > Chemistry

1 answers

Ďãřşháñăã Yadav???✊ 7 years, 7 months ago

According to Gay- Lussac's law, the pressure of an ideal gas is directly proportional to its temperature.

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Calculate the wavelenght (in nanometre) associated with a proton moving at 1.0×10^3m/s( mass of proton=1.67×10^-27 kg and h=6.63×10^-34 Js) Correct ans:- 0.40 nm (hint).

Posted by Aman Kumar 7 years, 7 months ago

CBSE > Class 11 > Chemistry

1 answers

Ďãřşháñăã Yadav???✊ 7 years, 7 months ago

use formula wavelength =h/mv=6.63×10^-34/1.67×10^-27×10^3=0.40nm

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The ionisation energy of hydrogen atom is x KJ. Find the energy for an electron to jump from second to third energy level

Posted by Nain Sahab 7 years, 7 months ago

CBSE > Class 11 > Chemistry

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The density of 2.03M aq. solution of acetic acid is 1.017g/ml. Calculate the molality of solution

Posted by Sahil Yadav 7 years, 7 months ago

CBSE > Class 11 > Chemistry

1 answers

Aman Kumar 7 years, 7 months ago

We have , 2.03 moles of acetic acid in 1000 g of solvent. Mass of solution= 1000×1.017 =1017. (Mass= density ×vol.) Mass of solvent =1017-2.03×60 =895.2 Molality= 2.03×1000/60×895.2 = 0.037..

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When 2.86g of a mixture of butene-1 ,C4H8 and butane C4H10 was burned in excess of oxygen. 8.80g of CO2 and 4.14 g of H2O were obtained . Calculate the % by mass of butane present in original mixture

Posted by Sahil Yadav 7 years, 7 months ago

CBSE > Class 11 > Chemistry

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The ionic radii of alkaline earth metals are smaller than those of alkali metals. Why?

Posted by Sahil Yadav 7 years, 7 months ago

CBSE > Class 11 > Chemistry

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Arrange in increasing order of size F- , li+ ,na+ , cl-

Posted by Sahil Yadav 7 years, 7 months ago

CBSE > Class 11 > Chemistry

2 answers

Ďãřşháñăã Yadav???✊ 7 years, 7 months ago

then na, f and last cl

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Ďãřşháñăã Yadav???✊ 7 years, 7 months ago

li+<Na+<F- <cl-.

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Calculate the de-broglie wavelength associated with a alpha particle of energy 7.7 into 10 raise to power-13 and a mass of 6.6 into 10 raise to power-24

Posted by Sahil Yadav 7 years, 7 months ago

CBSE > Class 11 > Chemistry

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Why the molecular form of sulphur is S8 not S2?

Posted by Mitali Das 7 years, 7 months ago

CBSE > Class 11 > Chemistry

3 answers

Ďãřşháñăã Yadav???✊ 7 years, 7 months ago

ya this is better.

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Aman Kumar 7 years, 7 months ago

In a simple language, In case of sulphur, there is a large distance btw two atoms and its p -orbitals can't overlaps and form single bond instead of double bond. That is why ,it is in the form of S8 not S2.

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Ďãřşháñăã Yadav???✊ 7 years, 7 months ago

Sulfur exists in many allotropic forms. S8 the cyclic or ring structure with chemical bonds among the atoms. It is best known as well as most stable allotrope at room temperature and normal atmosphere. It reduces only in presence of strong acids. It is also known as ortho rhombiicsulfur. Sulfur exists as 4 isotopes and they contain sulfur of different oxidation states.

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State whether a solution of nitrate is a conductor of electricity or not?

Posted by Sahil Yadav 7 years, 7 months ago

CBSE > Class 11 > Chemistry