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{:((a),"Identification of" 1^(@)","2^(@)...

`{:((a),"Identification of" 1^(@)","2^(@)and3^(@)"Alcohol",(P),"Oxymercuration demercuration react"),((b),"Identification of"1^(@)","2^(@)and3^(@) "Nitroalkane",(Q),Cu//300^(@)C","Delta),((c),"Formation of alcohol by anti-Markownikoff's additioin",(R),"Victor Meyer test"),((d),"Formation of alcohol by Markownikoff's addition",(S),"Huydroboration oxidation"):}`

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A, B, C, D
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In the Victor Meyer's test, the colours given by 1^(@), 2^(@) and 3^(@) alcohols are respectively :

Acid catalysed hydration of alkene give alcohol. In thic reaction addition of water takes place according to Markownikov's rule. Since intermediate carbocation is formed in this reaction, rearrangment of carbocation takes place. In oxymercuration-demercuration reaction hydration of alkene takes place according to markownikov's rule. Oxymercuratio-demercuration-dermercuration no rearrangement is possible. in hydroboration-oxidation hydration of alkene takes place according to anti marjownikow's addition. in HBO reaction rearrangement is not possible. both in oxymercuration-demercuation and hydroboration-oxidation, intermediate carbocation are not formed. Q. CH_(3)-C-=C-Hunderset(H_(2)O_(2)//OH^(-))overset((Sia)_(2)HB)toA, A is

{:(" List-I"," List-II"),((P)"Alcohol",(1)-"ol"),((Q)"Aldehyde",(2)-"ene"),((R ) "Ketone",(3)-"one"),((S)"Alkene",(4)-"al"):}

Explain the mechanism of the following reactions: a) Addition of bromine and ethylene. b) Addition of HBr on ethylene. c) Dehydration of an alcohol. d) Addition of HBr on buta-1,3-diene. e) Addition of HCl on 3,3-dimethylbut-1-ene.

There are four alcohols P,Q,R,S which have 3,2,1,zero alpha hydrogen atoms which will not gives any colour in Victor Meyer test:

{:(,"List-I",,"List-II"),((P),"Wood spirit",(1),"Ethyl alcohol"),((Q),"Absolute alcohol",(2),"Methyl alcohol"),((R),"Glycerine",(3),"1,2-Dihydroxy ethane"),((S),"Glycerol",(4),"1,2,3-Trihydroxy propane"):}