1

IIT-JEE 1997

MCQ (Single Correct Answer)
Which contains both polar and non-polar bonds?
A
NH4Cl
B
HCN
C
H2O2
D
CH4
2

IIT-JEE 1997

MCQ (Single Correct Answer)
The critical temperature of water is higher than that of O2 because the H2O molecule has
A
fewer electrons than O2
B
two covalent bonds
C
V-shape
D
dipole moment
3

IIT-JEE 1996

MCQ (Single Correct Answer)
Among the following species, identity the isostructural pairs NF3, $$NO_3^-$$, BF3, H3O+ , HN3
A
[NF3, $$NO_3^-$$] and [BF3, H3O+]
B
[NF3, HN3] and [$$NO_3^-$$, BF3]
C
[NF3, H3O+] and [$$NO_3^-$$, BF3]
D
[NF3, H3O+] and [HN3, BF3]
4

IIT-JEE 1996

MCQ (Single Correct Answer)
The number and type of bonds between two carbon atoms in CaC2 are:
A
one sigma ($$\sigma$$) and one pi ($$\pi$$) bonds
B
one sigma ($$\sigma$$) and two pi ($$\pi$$) bonds
C
one sigma ($$\sigma$$) and one and a half pi ($$\pi$$) bonds
D
one sigma ($$\sigma$$) bond

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