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Even number carbon allene system is not optically active as it it symmetric and in plane!!!!

no need chiral centre is not the main requirement the main requirement is that it must be assymetrical and its mirror image must be nonsuperimposable and lat examples of those which dont have a chiral centre but still optical activity are

spiro 1,1 bicyclo compunds

substituted bi phenyls

allenes of odd number carbons

hey its enough if you are thorough with the polymers that are there in the NCERT text book!!!! just learn them and see if you know all the polymers given in the portion for IITJEE only cellulose and ofcourse you know them!!!!

yeah pyrolle is aromatic where as its protonated form is not as there is an absence of lone pair for satisfying the huckel rule and for that computer001's doubt, layman you are rite!!!! its not anti aromatic but the rite explaination i feel is that for anti aromaticty you need the compund to be planar containing sp2 or sp groups but here N is sp3 and not planar condition not satisfied!!! now understood??

when the shrodinger wave functions of the sine or cos form of opposite signs orbitals overlap it leads to somewhat similar to destructive interference like in physics ie due to out of phase overlap the resulting molcular orbital is known as antibonding molecular orbital which is of higher energy and unstable when a electron occupies it !!! any doubts???

it is an asyymetrical molecule with a symmetrical fragment the number of geometric isomers is 2 ie Engegon and zuzamen you give the order of priority to the respective substituents by cahn ingold prelog rules and then if the highest order on one side is on the same side as that of the other side then it is zuzamen otherwise engagen hope u understood!!!!

hey the alcohols dont provide that H+ in that first step it is the H+ of the medium that is used for the protonation purpose thats why esterification is done in the presence of H2SO4 which is a stronger acid than carbxylic acid obviously!!!!

yeah of course they repel but the nuclear force of attraction between the elctron and the nucleus of the other atonm overcomes this and provides the neccesary energy!!!(in fact more than sufficient one)

see aqeous KOH is used to generate nucleophilic OH- and thus used mainly in preparation of alcohols !!!!!it becomes K+ and OH- in aqeous medium!! whereas in the case of alcohlic KOH OH- is not generated due to presence of non polar medium and thus KOH acts as a strong base in abstracting H+ and thus causes elimination understood??? rate if useful!!!!

i think this question has been posted already da but nways smaller the charge carried by the particles lesser the amount of current no it should be small but not zero to be noted!!!!

hey this is the best logic i felt to indentify or distinguish between a peroxide and a dioxide

consider an oxide given put oxygen as -2 charge and solve for oxidation state of the metal if than answer is one of the possible oxidation state of that metal then it is a dioxide otherwise its a peroxide or a super oxide

for eg

Na2O2 when we do the calculation we get +2 for Na which is never possible thats why we call it a peroxide

on the other hand for MnO2 we get +4 oxidation state for Mn which is possible and therefore it is a dioxide!!! rate if you find useful!!!ok???

any doubts???

yeah computer 001 is obviously rite da i approve of ur method it is 0.5 only!!! perfect!!! her's my rate!!!

answer is 0.5!!!i tried now the same method!!

yeah i think its a combined effect of reflection and refraction!!!

hey all those which dont have a d orbital or a f obital ie the 2nd period elements obey octect rule others due to the presence on f d orbitalss have the capability to fill in 18 electrons and thus have expanded octect but to find hybridistaion or structure we have to make the central atom attain octect only by(removing double bonds)and providing the necessary charge for the atoms involved try for urself some compound and check Rate if useful!!!

blucore Serial Line Internet Protocol (SLIP) is a mostly done for encapsulation of the Internet Protocol our comsci teacher had told abt that in class!!!

whats that other thing ???