1

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
2

IIT-JEE 1995 Screening

MCQ (Single Correct Answer)
Number of paired electrons in O2 molecules is
A
7
B
8
C
16
D
14
3

IIT-JEE 1995 Screening

MCQ (Single Correct Answer)
Which one is most ionic
A
P2O5
B
CrO3
C
MnO
D
Mn2O7
4

IIT-JEE 1993

MCQ (Single Correct Answer)
Pick out the isoelectronic structures from the following
I. $$CH_3^+$$
II. $$H_3O^+$$
III. $$NH_3$$
IV. $$CH_3^-$$
A
I and II
B
III and IV
C
I and III
D
II, III and IV

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Class 12