1
AIEEE 2008
MCQ (Single Correct Answer)
+4
-1
Which of the following pair of species have the same bond order?
A
CN- and NO+
B
CN- and CN+
C
$$O_2^-$$ and CN-
D
NO+ and CN+
2
AIEEE 2008
MCQ (Single Correct Answer)
+4
-1
Which one of the following constitutes a group of the isoelectronic species?
A
$$C_2^{2 - }$$, $$O_2^{-}$$, CO, NO
B
$$NO^{+}$$, $$C_2^{2 - }$$, CN-, $$N_2$$
C
CN-, $$N_2$$, $$O_2^{2-}$$, $$C_2^{2 - }$$
D
$$N_2$$, $$O_2^{-}$$, $$NO^{+}$$, CO
3
AIEEE 2008
MCQ (Single Correct Answer)
+4
-1
The ionization enthalpy of hydrogen atom is 1.312 × 106 J mol−1. The energy required to excite the electron in the atom from n = 1 to n = 2 is
A
8.51 × 105 J mol−1
B
6.56 × 105 J mol−1
C
7.56 × 105 J mol−1
D
9.84 × 105 J mol−1
4
AIEEE 2008
MCQ (Single Correct Answer)
+4
-1
The mean of the numbers a, b, 8, 5, 10 is 6 and the variance is 6.80. Then which one of the following gives possible values of a and b?
A
a = 0, b = 7
B
a = 5, b = 2
C
a = 1, b = 6
D
a = 3, b = 4

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