11for 1st q.,have a look at this --
http://targetiit.com/iit-jee-forum/posts/eelectrophilic-aromatic-substitution-11026.html
Q1 which can be used as solvent in friedel craft reaction
a)nitrobenzene
b)toulene
c)phenol
d)toulene
Q2 T/F
a)energy (hybrid strucuture) less than resonance strucutre
b)resonance energy=diff in enthalpies of formation of molecule and resonating structure having max elnergy
c)kekule structure contriburte more to benzene structure than Dewar
d)all C-C bond lengths are equal in benzene
Q3 which reacts with [Ag(NH3)2OH]
a)2-butyne
b)ethyne
c)propyne
d)formaldehyde
Q4 Ethyl bromide +Na +dry ether →A+B+C
identify them..
Q5 smallest chloro alkane wich gives distereomer on chlorination is ??
a)3methyl 3chloro hexane
b)2chloro pentane
c)3chloro pentane
d)none
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10 Answers
1111in 3 they are asking which compound will give Tollen's test..
2-butyne does NOT react,,only 1-Butyne does.
formaldehyde reacts.
ethyne reacts.
propyne does not react ( not sure).
24@ronald....i posted ques after reading that post only becoz no conclusion was reached there...
yeah in q3 ..tollens test....tell me what are u getting ??my answer key says a diff story..
11hey 4 is Wurtz synthesis ..
A - butane (major product as this is primary halide)
B - ethane
C - ethene
B and C are side products as substitution is preferred here.
1for 1st question I thing it is nitrobenzene,bcoz due to presence of deactivating nitro group it does not give friedel caft reaction
106Q1. Those substances can be used as solvents which themselves are not affected by the reactants or reagents. Here the reactants/reagents are R-X or R-COCl and a lewis acid such as AlCl3.
Now, nitrobenzene being highly deactivated does not show this reaction so it can be used as a solvent.
In the case of others, the solvent itself wil react with reagents to give product not desired at all
Q2. (a) could not get the statement
(b) F
(c) T
(d) T
Q3. b,c,d .. terminal alkynes having acidic H react with TR.. so do aldehydes and formic acid (and some biomolecules which i dunno)