|
What is meant by (i) delocalisation, (ii) resonance energy
|
|
1
|
2849
|
August 24, 2018
|
|
How will you convert benzene into
|
|
1
|
27748
|
December 19, 2016
|
|
7-bromo-1, 3, 5-cycloheptatriene exists as an ion
|
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1
|
4381
|
December 19, 2016
|
|
Complete the following
|
|
1
|
727
|
December 19, 2016
|
|
Out of benzene, m-dinitrobenzene and toluene which will undergo nitration most easily and why?
|
|
0
|
8578
|
December 19, 2016
|
|
Arrange benzene,n-hexane and ethyne in decreasing order
|
|
1
|
1808
|
December 19, 2016
|
|
On converting benzene to toluene, state whether there will be a rise or fall in the melting point
|
|
0
|
1874
|
December 19, 2016
|
|
Why is benzene extraordinarily stable though it contains three double bonds?
|
|
0
|
8263
|
December 19, 2016
|
|
Why do alkenes prefer to undergo electrophilic addition reaction while arenes prefer electrophilic substitution reactions? Explain
|
|
0
|
9881
|
December 19, 2016
|
|
Despite their -I effect, halogens are o and p-directing in haloarenes. Explain
|
|
0
|
3966
|
December 19, 2016
|
|
What will be the product obtained as a result of the following reaction and why?
|
|
1
|
2872
|
December 19, 2016
|
|
Give the structures of A and B
|
|
1
|
730
|
December 19, 2016
|
|
In the presence of peroxide,
|
|
1
|
1663
|
December 19, 2016
|
|
Complete following reactions
|
|
1
|
1816
|
December 19, 2016
|
|
Write equations for the preparation of
|
|
1
|
751
|
December 19, 2016
|
|
Hydrocarbon A gave a white precipitate with ammoniacal silver nitrate
|
|
1
|
3584
|
December 19, 2016
|
|
Name the organic products of the reaction of but-2-ene with each of the following reagents and write a balanced equation for each reaction
|
|
1
|
4896
|
December 19, 2016
|
|
Propanal and pentan-3-one are the ozonolysis products of an alkene
|
|
1
|
16587
|
December 19, 2016
|
|
An alkene A on ozonolysis gives a mixture of ethanal and pentan-3-one. Write structure and IUPAC name Of A
|
|
0
|
10464
|
December 19, 2016
|
|
Draw the cis- and trans- structures of hex-2-ene. Which isomer will have higher boiling point and why?
|
|
0
|
9001
|
December 19, 2016
|
|
Write structures of different isomeric alkyl groups
|
|
1
|
5489
|
December 19, 2016
|
|
Arrange the three isomeric pentanes in order of increasing stability at room temperature
|
|
1
|
4153
|
December 19, 2016
|
|
The relative reactivity of 1°, 2°, 3° hydrogens towards chlorination is 1: 3.8: 5
|
|
1
|
5128
|
December 19, 2016
|
|
An alkane is obtained as the only product on subjecting a primary alkyl halide to Wurtz reaction
|
|
1
|
3145
|
December 19, 2016
|
|
Write IUPAC names of the following compounds
|
|
1
|
4301
|
December 19, 2016
|
|
Rotation around carbon-carbon single bond of ethane is not completely free. Justify the statement
|
|
0
|
4178
|
December 19, 2016
|
|
Write hydrocarbon radicals that can be formed
|
|
1
|
2890
|
December 19, 2016
|
|
What happens when bromoethane is treated with zinc and hydrochloric add?
|
|
1
|
5654
|
December 19, 2016
|
|
Why is Wurtz reaction not preferred for the preparation of alkanes containing odd number of carbon atoms?
|
|
1
|
11976
|
December 19, 2016
|
|
Write structural formulae of the following compounds
|
|
1
|
3075
|
December 19, 2016
|