1

IIT-JEE 1992

MCQ (Single Correct Answer)
The cyanide ion, CN- and N2 are isoelectronic, But in contrast to CN-, N2 is chemically inert, because of
A
low bond energy
B
absence of bond polarity
C
unsymmetrical electron distribution
D
presence of more number of electrons in bonding orbitals
2

IIT-JEE 1992

MCQ (Single Correct Answer)
The maximum number of hydrogen bonds a water molecule can form is
A
2
B
4
C
3
D
1
3

IIT-JEE 1989

MCQ (Single Correct Answer)
Which of the following is paramagnetic?
A
$$O_2^-$$
B
CN-
C
CO
D
NO+
4

IIT-JEE 1989

MCQ (Single Correct Answer)
The compound in which $$\mathop C\limits^* $$ uses its sp3 hybrid orbitals for bond formation is
A
H $$\mathop C\limits^* $$ OOH
B
(H2N)2 $$\mathop C\limits^* $$ O
C
(CH3)3 $$\mathop C\limits^* $$ OH
D
CH3 $$\mathop C\limits^* $$ HO

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