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Catalogs Discussion Forums -> Organic Chemistry -> Which is more acidic formic acid or benzoic acid. What about -i effect of co group -> Go to message
This Post 10 points    (Olaaa!! Perrrfect answer.   in 2 votes )   [?]

The factors, which increase the stability of carboxylate ion more than the carboxylic acids, increase the acidic strength of acid and the factors that decrease the stability of carboxylate ion decrease the acid strength

In Benzoic acid the Phenyl group is directly attached to - COOH group. Gives overall electron releasing effect so unsubstituted C.Acids are stronger than aliphatic acids.

The order of acidic strength is  depending on Pka values as shown below     Formic acid > Benzoic acid > Acetic acid.

 

Catalogs Discussion Forums -> Organic Chemistry -> Acidic nature methyl group (-CH3) , add hone ke saath reduce kyon hota hai? -> Go to message
This Post 10 points    (Olaaa!! Perrrfect answer.   in 2 votes )   [?]

I think you are talking about the acidic nature of carboxylic acids. The Methyl group is electron releasing in nature and causes +I effect which makes release of H+ difficult due to increase d electron density around c and finally O-H bond becomes stronger  therefore its acidic character decreases

Catalogs Discussion Forums -> Coaching Institutes & Course Material -> sir,which buk is better for basics of organic and inorganic-ncert or [morissonboyd,jdlee]? -> Go to message
This Post 5 points    (Olaaa!! Perrrfect answer.   in 1 votes )   [?]

BESIDES NCERT BOOK NO DOUBT MORRISON BYOD AND COREY BOOKS ARE GOOD. EVEN SOME BOOKS OF PRAGATI PARKASHAN ARE ALSO GOOD.

    INORGANIC CHEMISTRY : OP AGGARWAL IS BEST

  ORGANIC  CHEMISTRY : O.P TANDON

PHYSICAL CHEMISTRY : P.BAHADUR

SHE IS ABSOLUTELY RIGHT

BUT FOR BOARD PREPARATION NCERT IS THE BEST

 

 

Catalogs Discussion Forums -> Physical Chemistry -> What is gibbs free energy? -> Go to message
This Post 10 points    (Olaaa!! Perrrfect answer.   in 2 votes )   [?]
Free energy of a system is defined as the maximum amount of energy available to a system during a process that can be converted into useful work. In other words it is a measure of capacity of a system to do useful work. It is denoted by symbol G and is given by G = H-TS where H is the enthalpy of the system, S is its entropy and T is the absolute temperature. Now, H = E + PV so G = E + PV- TS
Free energy of a system is defined as the maximum amount of energy available to a system during a process that can be converted into useful work. In other words it is a measure of capacity of a system to do useful work. It is denoted by symbol G and is given by  

G = H-TS

where H is the enthalpy of the system, S is its entropy and T is the absolute temperature. 

 

Now, H = E + PV  

so

G = E + PV- TS  

 .

 

Catalogs Discussion Forums -> Physical Chemistry -> What is gibbs free energy? -> Go to message
This Post 5 points    (Olaaa!! Perrrfect answer.   in 1 votes )   [?]

 
 
 
 
 
 
 
 
 
Catalogs Discussion Forums -> Organic Chemistry -> GOC and Alkyl halides -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
Answer of the question is 3 i.e. NaOI which is responsible for he formation of Iodoform2. q answer is 2 as h is replaed by Br and for stable product
Catalogs Discussion Forums -> Organic Chemistry -> what is urotropine and how is it prepared from formaldehyde?? -> Go to message
This Post 5 points    (Olaaa!! Perrrfect answer.   in 1 votes )   [?]
formaldehyde reacts with ammonia to form hexamethylene tetramine (CH2)6N4 also known as urotropine.
Catalogs Discussion Forums -> Organic Chemistry -> what is the common name of 2-butanone -> Go to message
This Post 15 points    (Olaaa!! Perrrfect answer.   in 3 votes )   [?]
The common name is Ethyl methyl ketone because alkyl groups are named alphabatically
Catalogs Discussion Forums -> Inorganic Chemistry -> the frequency of a spectral transition v for hydrogen .the frequency for the corresponding -> Go to message
This Post 5 points    (Olaaa!! Perrrfect answer.   in 1 votes )   [?]
If you are taking about the calculation related to enrgy emitted during transition from one level to another The frequency of the emitted radiation is: v(nu) = E2-E1/h Since E2 and E1 have only definite values and are characteristic of energy levels of atoms, the values of 'n' will also be definite and characteristic of the atoms. Thus each transition will produce a light of definite wavelength, which is observed as a line in the spectrum. Corresponding frequency can be calculated(please write question very clearly)
Catalogs Discussion Forums -> Organic Chemistry -> GIVE THE IUPAC NAME: CH3-CH2-C-NH-C2H5 || O -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
the formula is CH3CH2C(doublebond O)NH-C2H5 and Name will be N-Ethylpropanamide as mentioned by Krishan Gopal sing Sir
Catalogs Discussion Forums -> Physical Chemistry -> define collision number.how to calculate collision number for a gas with n identical mols. -> Go to message
This Post 5 points    (Olaaa!! Perrrfect answer.   in 1 votes )   [?]
Collision numberNumber of bimolecular collisions in 1 m3 per sec,Z11 (s-1m-3) = ½ N/V z11½ not to count collisions twice=1/?2 (N/V)2 ?d2?Vfor different molecules,Z12 = (NA/V) (NB/V) ? (r1 + r2)2 (8kT/? ?)½Collision Number is very large ~ 1034 for N2 at STP
Catalogs Discussion Forums -> Physical Chemistry -> define collision number.how to calculate collision number for a gas with n identical mols. -> Go to message
This Post 5 points    (Olaaa!! Perrrfect answer.   in 1 votes )   [?]
Total collision frequency for all molecules within a volume divided by that volume.Collision number now a days is called as collision density and is represented by Zaa
Catalogs Discussion Forums -> Inorganic Chemistry -> IN WICH WE PUT SODIUM IN TOLUENE,BENZENZ,XYLENE & WHY -> Go to message
This Post 5 points    (Olaaa!! Perrrfect answer.   in 1 votes )   [?]
Sodium is introduced into xylene. In which each methyl group takes one Na atom -..-00------------++++++++++++++++++Na is added to Xylenes to form Sodium alkyl . which are further used for alkylation. In other words xylenes can be further alkylated through addition of Na to xylenes
Catalogs Discussion Forums -> Inorganic Chemistry -> IN WICH WE PUT SODIUM IN TOLUENE,BENZENZ,XYLENE & WHY -> Go to message
This Post 5 points    (Olaaa!! Perrrfect answer.   in 1 votes )   [?]
Sodium is introduced into xylene. In which each methyl group takes one Na atom -..-00------------++++++++++++++++++Na is added to Xylenes to form Sodium alkyl . which are further used for alkylation. In other words xylenes can be further alkylated through addition of Na to xylenes
Catalogs Discussion Forums -> Inorganic Chemistry -> IN WICH WE PUT SODIUM IN TOLUENE,BENZENZ,XYLENE & WHY -> Go to message
This Post 5 points    (Olaaa!! Perrrfect answer.   in 1 votes )   [?]
Sodium is introduced into xylene. In which each methyl group takes one Na atom -..-00------------++++++++++++++++++Na is added to Xylenes to form Sodium alkyl . which are further used for alkylation. In other words xylenes can be further alkylated through addition of Na to xylenes
Catalogs Discussion Forums -> Inorganic Chemistry -> how does make an element such as Na, Mg, Fe etc. in universe? -> Go to message
This Post 5 points    (Olaaa!! Perrrfect answer.   in 1 votes )   [?]
question is not clear . what u actually want to know? You want to know natural sources of these elemens or their preparatione.g. Sodium is a regular part of our food supply. It is found naturally in meats, nuts, grains, fruits, vegetables, and dairy products in low amountsMagnesium is very abundant in nature, occurring in substantial amounts in many rock-forming minerals such as dolomite, magnesite, olivine, and serpentine. In addition, magnesium is also found in sea water, subterranean brines, and salt beds. It is the third most abundant structural metal in the Earth's crust, exceeded only by aluminum and iron.some natural sources of Fe are Almonds, Apricots,Beets (and greens),Chicken etc
Catalogs Discussion Forums -> Inorganic Chemistry -> arrange in correct order of bond strength - NF3, NCl3, NH3. Explain in details. -> Go to message
This Post 5 points    (Olaaa!! Perrrfect answer.   in 1 votes )   [?]
i dont know what happened to text i m writing answer againThe correct order is NCl3 < NF3 < NH3 this is due to the fact that bond strength depends upon the extent of overlapping between orbitals . In above compounds the overlapping is between 2p - and 3p orbitals , it is between 2p-2p in NF3 while it is between 2p-2s . The order of penetration towards nucleous is of order of s>p>d>f. So bond in NH3 is strongest where bond in NF3 is stronger than NCl3
Catalogs Discussion Forums -> Inorganic Chemistry -> arrange in correct order of bond strength - NF3, NCl3, NH3. Explain in details. -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
The correct order is of course NCl3p>d>f . as in case of ammonia s orbitals are involved so N-H bond is strongest among all NF3 is stronger than NCl3
Catalogs Discussion Forums -> Inorganic Chemistry -> why chlorine has more electron affinity than fluorine though it decreases downwards -> Go to message
This Post 5 points    (Olaaa!! Perrrfect answer.   in 1 votes )   [?]
Electron affinity of Cl is more than that of F because fFhas exceptionally small size and the electrons present in F are compactly packed and further addition of an electron to F leads to repulsion as a result of which EA of F decreases than Cl
Catalogs Discussion Forums -> Inorganic Chemistry -> difference between basicity & nucleophilicity -> Go to message
This Post 5 points    (Olaaa!! Perrrfect answer.   in 1 votes )   [?]
While the two terms are often closely related, there is no exact parallel relationship between them. Basicity is a matter of equilibrium Based on Bronsted theory, water is a stronger base than chloride ion because the equilibrium favors the acceptance of a proton by water more than the acceptance of a proton by chloride ion. Nucleophilicity is a matter of kinetics (rate) Hydroxide ion is a better nucleophile than ammonia because hydroxide ion attacks carbon faster than ammonia. ? Basicity involves proton transfer ? Nucleophilicity involves attack rate at sp3 carbon
 
 
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