1
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
Given : The mass of electron is 9.11 $$ \times $$ 10$$-$$31 kg, Planck constant is 6.626 $$ \times $$ 10$$-$$34 J s, the uncertainty involved in the measurement of velocity within a distance of 0.1 $$\mathop A\limits^ \circ $$ is
A
5.79 $$ \times $$ 105 m s$$-$$1
B
5.79 $$ \times $$ 106 m s$$-$$1
C
5.79 $$ \times $$ 107 m s$$-$$1
D
5.79 $$ \times $$ 108 m s$$-$$1
2
AIPMT 2005
MCQ (Single Correct Answer)
+4
-1
The energy of second Bohr orbit of the hydrogen atom is $$-$$328 kJ mol$$-$$1; hence the energy of fourth Bohr orbit would be
A
$$-$$ 41 kJ mol$$-$$1
B
$$-$$82 kJ mol$$-$$1
C
$$-$$164 kJ mol$$-$$1
D
$$-$$1312 kJ mol$$-$$1
3
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
The frequency of radiation emitted when the electron falls from n = 4 to n = 1 in hydrogen atom will be (Given ionization energy of H = 2.18 $$ \times $$ 10$$-$$18 J atom$$-$$1 and h = 6.625 $$ \times $$ 10$$-$$34 J s)
A
1.54 $$ \times $$ 1015 s$$-$$1
B
1.03 $$ \times $$ 1015 s$$-$$1
C
3.08 $$ \times $$ 1015 s$$-$$1
D
2.00 $$ \times $$ 1015 s$$-$$1
4
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
The velocity of Planck's constant is 6.63 $$ \times $$ 10$$-$$34 J s.

The velocity of light is 3.0 $$ \times $$ 108 m s$$-$$1. Which value is closest to the wavelength in nanometers of a quantum of light with frequency of 8 $$ \times $$ 1015 s$$-$$1 ?
A
2 $$ \times $$ 10$$-$$25
B
5 $$ \times $$ 10$$-$$18
C
$$4 \times {10^1}$$
D
3 $$ \times $$ 107
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