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How can water vapour be a green house gas ?? Pls clarify this question. Wat harm can be produced by water vapour ?

Posted by Priya Dharshini ? 6 years, 10 months ago

CBSE > Class 11 > Chemistry

2 answers

Priya Dharshini ? 6 years, 10 months ago

Tnq

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Kartik ? 6 years, 10 months ago

Greenhouse effect simply means the phenomenon of trapping heat energy from sun in the atmosphere. Water vapors absorb the infrared radiation emmited by the sun and prevent it for escaping ....as a result warming the atmosphere. Excess amout of vapors in atmosphere can cause similar heating effects caused by CO2 ,etc. Except from this ...no harm is done.

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What is third law of thermodynamics ??

Posted by Udita Singh 6 years, 10 months ago

CBSE > Class 11 > Chemistry

2 answers

Čůťê Ğīřł ? ? 6 years, 10 months ago

According to this law , at absolute zero temperature the entropy of a perfectly crystalline substance is taken as zero ..?

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Yogita Ingle 6 years, 10 months ago

The third law of thermodynamics states that ” The entropy of a perfect crystal at absolute zero temperature is exactly equal to zero.”

At absolute zero that is zero Kelvin, the system is said to possess minimum energy. This statement of the third law of thermodynamics holds true only when the perfect crystal has minimum energy state. If the system has minimum disturbances it means that the temperature has approached zero Kelvin where molecular motion seizes to exist. Standard molar entropy is defined as the entropy per mole of a substance at standard conditions and specified temperature.

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We dont see a car moving as a wave on the road why

Posted by Rizul Dulat 6 years, 10 months ago

CBSE > Class 11 > Chemistry

3 answers

Karanpreet Singh 6 years, 10 months ago

We don't see a car moving as a wave because according to debroglie's wave equation , the wave nature is followed by every microscopic as well as macroscopic particle but in macroscopic particles the wavelength becomes very small which cannot be seen with naked aye

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Kartik ? 6 years, 10 months ago

wavelength = planks' constant / mass × velocity........The greater the mass the lower will be the wavelength.

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Čůťê Ğīřł ? ? 6 years, 10 months ago

Because its amplitude is very small

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Calculate equilibrium concentration of CO2,H2,CO,H2O......... CO+H2O = CO2 + H2 AT 800K if only CO and H2O are present in initially at conc. Of o.1 M each and kc is 4.24

Posted by Rizul Dulat 6 years, 10 months ago

CBSE > Class 11 > Chemistry

1 answers

Čůťê Ğīřł ? ? 6 years, 10 months ago

Yaar ... I can't understand the equation ... can you please type it again ...?

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What is meant by conjugate acid or base HNO3 and CN-

Posted by Rizul Dulat 6 years, 10 months ago

CBSE > Class 11 > Chemistry

0 answers

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For rxn 2A (g) +B (g) => 2D(g) ∆H° is -105.... ∆S is - 44.1.... Predict ∆G wheather rxn is spontaneous or not

Posted by Rizul Dulat 6 years, 10 months ago

CBSE > Class 11 > Chemistry

1 answers

Čůťê Ğīřł ? ? 6 years, 10 months ago

At what temperature is this reaxn. Takes place ????

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Define functional grp and homologous series

Posted by Rizul Dulat 6 years, 10 months ago

CBSE > Class 11 > Chemistry

3 answers

Yogita Ingle 6 years, 10 months ago

Functional group: The first part, i.e. R denotes the carbon -hydrogen framework of the molecule while the second part i.e. G is called the functional group. A functional group may be defined as as atom or a group of atoms present in a molecule which largely determines its chemical properties.

Homologous series: A homologous series is defined as a family or group of structurally similar organic compounds all the members of which contain the same functional group, Show a gradation in physical and similarity in chemical properties and any two adjacent members of which differ by a -CH2 group. The individual members of such a series are called homologues and the phenomena is called homology.

Alkanes constitute a homologous series.

CH₄ Methane

C₂H₆ Ethane

C₃H₈ Propane

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Čůťê Ğīřł ? ? 6 years, 10 months ago

HOMOLOGOUS SERIES :: The series of carbon chain with same functional group having a difference of CH2 with every successive member . Lets take a simple example ... like .. we are having .... CH4 , C2H6 , C3H8 ... in CH4 there is one C atom and 4 H atoms but in its next member i.e. C2H6 ... there are 2 C atoms and 6 H atoms now ... look at their difference ... there is difference of CH2 in both of the members ... and the same is with C2H6 and C3H8 ... thus , it belongs to Homologous series. ?

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Čůťê Ğīřł ? ? 6 years, 10 months ago

FUNCTIONAL GROUP :: The elements or group of elements which determines the chemical properties of the respective compound are known to be functional group . For example : -OH , -COOH etc. ==> If OH group is attached with a compound then the first thought strike on our mind is that the compound is alcoholic ... means we can determine a lots of chemical properties just on the basis of this functional group .

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Arrange the following compound in order of increasing ionic character in molecules IiF , K2O, N2, SO2, ClF2

Posted by Rizul Dulat 6 years, 10 months ago

CBSE > Class 11 > Chemistry

1 answers

Čůťê Ğīřł ? ? 6 years, 10 months ago

I think .... its .. N2 < SO2 < ClF2 < K2O < LiF2 ... this is on the basis of electronegetivity difference . The order of increasing electronegetivity difference leads to higher ionic character..?

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What is meant by bond order .....calculate the bond order of N2 , O2 , O2anion , O2 cation

Posted by Rizul Dulat 6 years, 10 months ago

CBSE > Class 11 > Chemistry

5 answers

Shreya Dixit 6 years, 10 months ago

Half of difference between bonding pair and antibonding pair.

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Mr Ajey? 6 years, 10 months ago

Yup having too much que5

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Čůťê Ğīřł ? ? 6 years, 10 months ago

a )) BOND ORDER means to no. Of bonds between a pair of atoms . b)) bond order of N2 is 3 . c)) In O2 .. its bond order is 2 .d)) Bond order of O2 anion and O2 cation are 2.5 and 1.5 respectively ..?

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Rizul Dulat 6 years, 10 months ago

No but I want answer

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Kriti Sharma 6 years, 10 months ago

Hey dude so much of questions do you have your chem exam tomorrow.

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why He+ ²

Posted by Shiva Sagar 6 years, 10 months ago

CBSE > Class 11 > Chemistry

0 answers

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Explain BeH2 molecule has zero dipole moment why

Posted by Rizul Dulat 6 years, 10 months ago

CBSE > Class 11 > Chemistry

1 answers

Čůťê Ğīřł ? ? 6 years, 10 months ago

BeH2 has linear structure in which both the Hydrogen atoms are in opposite direction . Thus , net dipole effects become zero ...?

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O has lower ionisation enthalpy than N and F

Posted by Rizul Dulat 6 years, 10 months ago

CBSE > Class 11 > Chemistry

1 answers

Karanpreet Singh 6 years, 10 months ago

This is because oxygen has one electron more than half filled configuration of p-orbital , so it gets out easily to get symmetrical

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Explain why Be has higher ionisation entalpy than B

Posted by Rizul Dulat 6 years, 10 months ago

CBSE > Class 11 > Chemistry

2 answers

Karanpreet Singh 6 years, 10 months ago

Because Be is more symmetrical than B as in Be s-orbital is full but in B one electron is there in p-orbital

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Čůťê Ğīřł ? ? 6 years, 10 months ago

Because of small size of Be its ionisation enthalpy is higher ...?

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Among 2nd period elements actual ionisation enthalpy Ii<B<Be<C<O<N<F<Ne. Explain why Be has higher ionisation enthalpy than B And O has lower ionisation enthalpy than N and F

Posted by Rizul Dulat 6 years, 10 months ago

CBSE > Class 11 > Chemistry

0 answers

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Difference between photon proton and quantum

Posted by Rizul Dulat 6 years, 10 months ago

CBSE > Class 11 > Chemistry

0 answers

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A sample of NaNO3 weighing 0.83 g is placed in 50 ml volumetric flask

Posted by Rizul Dulat 6 years, 10 months ago

CBSE > Class 11 > Chemistry

1 answers

Rizul Dulat 6 years, 10 months ago

The flask is then filled with water to the mark n neck what is the molarity of solution

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Calculate the molarity of water if density is 1000 kg/m3

Posted by Rizul Dulat 6 years, 10 months ago

CBSE > Class 11 > Chemistry

0 answers

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Write the iupac name of CHOCOOH

Posted by Shraddha Patel 6 years, 10 months ago

CBSE > Class 11 > Chemistry

2 answers

Čůťê Ğīřł ? ? 6 years, 10 months ago

You can name it as formylethanoic acid based on the priority of the functional groups...?

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Mr. Ajey ? 6 years, 10 months ago

???

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Write vander waals equation for 1 mole of real gas

Posted by Rizul Dulat 6 years, 10 months ago

CBSE > Class 11 > Chemistry

2 answers

Rizul Dulat 6 years, 10 months ago

Thnks chore

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Čůťê Ğīřł ? ? 6 years, 10 months ago

(P - n^2b^2/V^2 ) ( V - n^2a^2) = RT

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Diffrence between conduction and valence band

Posted by Rizul Dulat 6 years, 10 months ago

CBSE > Class 11 > Chemistry

0 answers

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For an isolated system internal energy change is zero than what will be change in ?S

Posted by Rizul Dulat 6 years, 10 months ago

CBSE > Class 11 > Chemistry

0 answers

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Emperical formula of glucose and sucrose

Posted by Rizul Dulat 6 years, 10 months ago

CBSE > Class 11 > Chemistry

0 answers

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Out of acetate and OH - which is stronger base and why

Posted by Rizul Dulat 6 years, 10 months ago

CBSE > Class 11 > Chemistry

1 answers

Čůťê Ğīřł ? ? 6 years, 10 months ago

OH is stronger base because it can easily donate electron pair ...?

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Calculate moles of hydrogen and carbon in three moles of ethane

Posted by Rizul Dulat 6 years, 10 months ago

CBSE > Class 11 > Chemistry

0 answers

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What is the simmilarity between Compressibilty factor(Z) of Chemistry and compressibilty factor (k) of physics???

Posted by Čůťê Ğīřł ? ? 6 years, 10 months ago

CBSE > Class 11 > Chemistry

1 answers

Čůťê Ğīřł ? ? 6 years, 10 months ago

Please ... answer it...?

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What is the hybridization state of c6h6

Posted by Ashu Kumar 6 years, 10 months ago

CBSE > Class 11 > Chemistry

2 answers

Čůťê Ğīřł ? ? 6 years, 10 months ago

Each Carbon atom in C6H6 ( Benzene ) is sp2 hybridised because electrons in the benzene ring are free to move which means that they are delocalised in the ring . ?

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Aashir Arham ⚽?⚽ 6 years, 10 months ago

For all carbon atom sp2 hybridization

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Potassium carbonate can not prepared solvay process.why?

Posted by Vikas Gupta 6 years, 10 months ago

CBSE > Class 11 > Chemistry