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Position isomers of alkene

Posted by Utkarsh Tailor 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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Please can you send half yearly sample papers of chemistry

Posted by Sonkamble Pooja 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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Adarsh Shukla 6 years, 4 months ago

Chapter kaonse kaonse hai

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Draw the structure of ice

Posted by Vaibhav Trivedi 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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Aditya Narayan Singh 6 years, 4 months ago

H2O ( s)

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Draw the molecular orbital diagram /energy diagram of O2-

Posted by Vaibhav Trivedi 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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Describe free radical mechanism

Posted by Aachal Singh 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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Describe important reactions of hydrocarbons chapter

Posted by Aachal Singh 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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Explain hyperconjugation , inductive , resonance and mesomeric effect with the help of examples

Posted by Aachal Singh 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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What are cis and trans isomers?

Posted by Aachal Singh 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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Define wurtz reaction and kolbes electrolytic method.

Posted by Aachal Singh 6 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Gurmandeep Singh 6 years, 4 months ago

When an alkyl halide( usually Bromide and iodide )is treated with sodium in dry Ether , a symmetrical alkane containing twice the number of carbon atoms of alkyl halide is obtained . General reaction: RX + 2 Na+ XR Form R-R +2NaX where R is alkyl & X is halogen .

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Methane cannot be prepared from kolbes electrolytic method. Why?

Posted by Aachal Singh 6 years, 4 months ago

CBSE > Class 11 > Chemistry

2 answers

Aditya Narayan Singh 6 years, 4 months ago

Sorry it's a mistake actually "teo" is two & " Simve" Is since

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Aditya Narayan Singh 6 years, 4 months ago

Because in this method teo carbon atoms are needed. Simve methane'ch4' has only one carbon so it can't be formed.

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During the fornation of alkanes from alkyl halides why fluorides cannot be used

Posted by Aachal Singh 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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Aditya Narayan Singh 6 years, 4 months ago

Since FLUORINATION is too violent to be controlled. * F2 ) Cl2) Br2) I2.

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Explain stereoisomerism

Posted by Aachal Singh 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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Tripti Maurya 6 years, 3 months ago

When isomerism is caused by the different arrangements of atoms or groups in space is called stereoisomerism.

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Explain geometrical and structural isomerism

Posted by Aachal Singh 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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Define surface tension and viscosity with examples

Posted by Aachal Singh 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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How the surface tension and viscosity depends upon temperature

Posted by Aachal Singh 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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Define the significance of vander wall constant

Posted by Aachal Singh 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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Why do real gases deviate from ideal behaviour

Posted by Aachal Singh 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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Show that Partial pressure = mole fraction × total pressure

Posted by Aachal Singh 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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State the daltons law of partial pressure

Posted by Aachal Singh 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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what do you mean by hyperconjugation?

Posted by Anakha Rajeevan 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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what is the standard enthalpy of formation of NH3 gas

Posted by Nitesh Bauri 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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Discuss the pattern of variation in the oxidation states of 1 B to Tl 2 C to Pb

Posted by Cricket Heaven 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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How to do organic chemistry

Posted by Kunal Mudgal 6 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Paras Kumar 6 years, 4 months ago

You have to concentrate on organic main and reactions,Iupac etc I think self study is best.

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Explain and define the 3 laws of thermodynamics

Posted by Aachal Singh 6 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Yogita Ingle 6 years, 4 months ago

Zeroth Law of Thermodynamics

Zeroth law of thermodynamics states that when two systems are in thermal equilibrium through a third system separately then they are in thermal equilibrium with each other also.
- Foreg: - Consider two systems A and B which are separated by an adiabatic wall. Heat flow happens between systems A and C, and between B and C, due to which all 3 systems attain thermal equilibrium.

First Law of Thermodynamics

The First law of thermodynamics is same as law of conservation of energy.
According to law of energy conservation: - Energy can neither be created nor be destroyed, only transformed to other forms.
According to first law of thermodynamics:- The change in the internal energy of a closed system is equal to the amount of heat supplied to the system, minus the amount of work done by the system on its surroundings.
Examples:- Consider a ball falling from the roof of the building when at top of the building the ball has only potential energy and when it starts falling potential energy decreases and kinetic energy starts increasing. At the ground it has only kinetic energy.

Second law of Thermodynamics

There are 2 statements of second law of thermodynamics given by two scientists:

Kelvin-Planck ∫Statement: - No process is possible whose result is the absorption of heat from a reservoir and the complete conversion of the heat into work.
Clausius statement: - No process is possible whose result is the transfer of heat from a colder object to a hotter object.

Explanation of Kelvin-Planck Statement: It is always impossible that the total amount of heat which is supplied to system will get converted to work, and there will always be loss of heat. Complete conversion of heat into work is not possible.

Explanation of Clausius statement: - Transfer of heat from colder body to hotter body won’t take place until some external work is done on the system.

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How third law of thermodynamics help to calculate absolute entrophy of a sunstance

Posted by Sakshi Gulati 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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CH3 and CD3 which will show more inductive positive effect?

Posted by Rahul Meena 6 years, 4 months ago

CBSE > Class 11 > Chemistry

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Trans-2-Butene has higher melting point than cis-2-Butene. Why?

Posted by Helen Samitha 6 years, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Gaurav Seth 6 years, 4 months ago

Trans-2-butene has higher melting point than cis isomer because mp depends on packing efficiency. Trans molecule have effective packing than cis-molecule as it is more symmetric. Cis molecule has less effective packing and replusion also exists between the bulky methyl groups which are on the same side, therefore less melting point.

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Consider reaction N2 + 3H2= 2NH3 ∆H=-92.4 KJ mol-1 . Which direction the equilibrium will shift when .1) temperature is increased .2) volume of NH3 is increased.3) pressure is decreased???????

Posted by Sushil Pradhan 6 years, 4 months ago

CBSE > Class 11 > Chemistry