Aromaticity

Aromaticity: Benzenoid and non-benzenoid compounds – generation and reactions.

YEAR JUN-2016 DEC-2015 JUN-2015 DEC-2014 JUN-2014 DEC-2013 JUN-2013 DEC-2012 JUN-2012 DEC-2011 JUN-2011
No.of questions appeared 1   – 1 2 1 1 1 2 1 2

1.The correct order of pKa values for the compounds X, Y and Z is……

aromaticity-csir-ugc-chemical-sciences

 

2.The compound that is antiaromatic is

2-antiaromatic-csir-net-gate-chemical-science-dec-2015

(a) I

(b) II

(c) III

(d) IV

 

3.The decreasing order of basicity of the following compounds is

3-basisity-csir-net-gate-chemical-science-dec-2015

(a) I > II > III > IV

(b) IV > I > II > III

(c) III > II > I > IV

(d) IV > III > II > I

 

4.The correct order of basicity for the following anions is

4-basicity-csir-net-gate-chemical-science-june-2014

(a) II > III > I

(b) I > II > III

(c) II > I > III

(d) III > II > I

 

5.Amongst the following, the compound which has the lowest energy barrier for the cis-trans isomerisation is:

5-lowest-energy-barrier-csir-net-gate-chemical-science-dec-2013

 

6.Among the following compounds, the one which has highest dipole moment is

6-diploe-moment-csir-net-gate-chemical-science-june-2013

 

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