During change of O2 to O$$_2^{ - }$$ ion, the electron adds on which one of the following orbitals ?
A
$${\pi ^ * }$$ orbital
B
$$\pi $$ orbital
C
$${\sigma ^ * }$$ orbital
D
$$\sigma $$ orbital
2
AIPMT 2012 Mains
MCQ (Single Correct Answer)
+4
-1
Two metallic spheres of radii 1 cm and 3 cm are given charges of $$-$$1 $$ \times $$ 10$$-$$2 C and 5 $$ \times $$ 10$$-$$2 C, respectively. If these are connected by a conducting wire, the final charge on the bigger sphere is
A
2 $$ \times $$ 10$$-$$2 C
B
3 $$ \times $$ 10$$-$$2 C
C
4 $$ \times $$ 10$$-$$2 C
D
1 $$ \times $$ 10$$-$$2 C
3
AIPMT 2012 Mains
MCQ (Single Correct Answer)
+4
-1
To get an output Y= 1 in given circuit which of the following input will be correct ?
A
A $$ \to $$ 1, B $$ \to $$ 0, C $$ \to $$ 0
B
A $$ \to $$ 1, B $$ \to $$ 0, C $$ \to $$ 1
C
A $$ \to $$ 1, B $$ \to $$ 1, C $$ \to $$ 0
D
A $$ \to $$ 0, B $$ \to $$ 1, C $$ \to $$ 0
4
AIPMT 2012 Mains
MCQ (Single Correct Answer)
+4
-1
The transition from the state n = 3 to n = 1 in a hydrogen like atom results in ultraviolet radiation. Infrared radiation will be obtained in the transition from
