1
IIT-JEE 1991
Subjective
+2
-0
Arrange the following :

Increasing strength of hydrogen bonding (X-H-X):

O, S, F, Cl, N
2
IIT-JEE 1988
Subjective
+2
-0
Arrange the following :

N2, O2, F2, Cl2 in increasing order of bond dissociation energy
3
IIT-JEE 1986
Subjective
+2
-0
Write the lewis dot structure of the following:
O3, COCl2
4
IIT-JEE 1985
Subjective
+2
-0
How many sigma bonds and how many pi-bonds are present in a benzene molecule?
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