Recently Active Chemistry Questions

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i am a starter in physical chemistry is arihant objective approach towards physical chemistry a better book or sholud i buy standard physical chemistry book??? plz help ...

my last optical isomer doubt at least for a few days from now on!!![3][3] we tell that in free radical substitution reaction takes place, the alkyl radical formed is flat in nature...and that the attack might take place equal ...

WHICH IS THE ONLY LETTER ABSENT FROM THE MODERN PERIODIC TABLE ? [ Don't even look at the periodic table after you have read the question else it will be cheating ! ] ...

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which of following is/are correct? 1.bromination of p-nitrotoluene in presence of iron gives 2-bromo-4-nitrotoluene 2.nitration of m-xylne gives 2,4-dimethyl-1-nitrobenzene 3.sulphonation of p-tert-buttyltoluene gives 5-tert- ...

wat is resonance energy basically?? n there is no difference between canonicals n resonating structures ryt?? ...

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1. The ionic radii of Ca2+ and Na+ ions are about the same yet calcium ions are more hydrated than sodium ions. Suggest an explanation for this. ...

someone please help me with this Q: The maximum radius of an atom which can occupy empty spaces (voids) in a body centred structure, of an element having atomic radius R, without causing any distortion, can be : Ans, ( 5/3 -1 ...

1)RCOCl +N3H/Δ/H2O → 2) *Image* + Cu2+/O2 → ...

*Image* can anyone give detailed discussion about the chira;ity and etc of this above structure?? the mid carbon is not chiral centre coz of 2 H atoms....now... will the structure be chiral? and discuss about the diastereomer ...

A sample of a pure liquid in a 10 cm tube is placed in a polarimeter and a reading of +45° is made... How could u establish that [α] is +45° and not -315° ? or how would u establish that [α] is +45° and not +415° or fo ...

Q: why is sulphuric acid not used during reaction of alcohols using KI?? umm....generally we use it like: R-OH + NaBr + H2SO4 ----> R-Br + NaHSO4 + H2O!! ...

Which is not the functional isomer of molecular formula C 4 H 8 O ? *Image* ...

plz explain me how 2 give the bond line representation of compounds.Explain it with the help of examples. Also tell me the meaning of solid & dashed wedge formula. ...

Both calculations and experimental evidence indicate that the dihedral angle beetween the methyl groups in the gauche conformation of n-butane is actually somewhat larger than 60°. How would you account for this? src: morris ...

in the BrF5 question the asked the number of F-Br-F bonds having 90 degree angle many say 0 many say 8 but i think answer must be 4 because of the lone pair distortion the four F in the corners of square are going to be eleva ...

*Image* where the hell did the H of OH and the other O of NO2 disappear? Mr. India or what? src: NCERT CHEM class 12 PART-2 ...

*Image* but i thgt answer is Na+ > Mg+2 > Li + > Be+2 isn't it ??? ...

1.What exactly is meant by BACK BONDING ? 2.What is Perhydrol ? 3.PBr4 and PI4 doesnot exist according to my theory book and reason given is that Pb4+ is a strong oxidant and Br- and I- are strong reductants [ and so Pb4+ can ...

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Is corrosion an electrochemical phenomena ??/ The IUPAC name of the compound with the structural formula CH3 - CH = CH - C *Image* CH is (A)pent-2-ene-4-yne (B)pent-1-yne-3-ene ...

A manometric fluid dibutyl phthalate has density 1.047x103 kg m-3. what pressure of this liquid of one mm height suggest? [ans. 0.077 torr] pls explian!!! ...

(1)How many eletrons in Na( atomis no. 11) satisfy the equation: 2n+l=5m+s where n, l, m, s are the principle, azimuthal, magnetic and spin quantum no.s respectively. . (a)1 (b)5 (c)6 (d) none of these . . . . (2)Which of the ...

between elimination reaction and nucleophilic substitution reaction which one requires highest activation energy for the reaction to take to place?? and why?? ...

Edited : http://www.scribd.com/doc/28349866/Alkyl-Halides-My-Notes A scribd link is better :P Name of topic says it all...govind asked me to post here for the greater good of studentkind :P Kindly rate the document if you rea ...

Q. A solution containing 2.675g of CoCl3. 6NH3 (molar mass = 267.5 g/mol) is passed through a cation exchanger. The chloride ions obtained in solution were treated with excess of AgNO3 to give 4.78g of AgCl(molar mass = 143.5 ...

Plz make me understand the meaning of quantum nos. & also principal quantum no.,azimuthal q.no.,magnetic q. no.,spin q. no.Explain me in such a way so that i can understand bcoz my new classes of XI have just started . ...