1
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
Which of the following is not permissible arrangement of electrons in an atom ?
A
n = 5, $$l$$ = 3, m = 0, s = +1/2
B
n = 3, $$l$$ = 2, m = $$-$$ 3, s = $$-$$1/2
C
n = 3, $$l$$ = 2, m = $$-$$ 2, s = $$-$$1/2
D
n = 4, $$l$$ = 0, m = 0, s = $$-$$1/2
2
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
The measurement of the electron position is associated with an uncertainty in momentum, which is equal to 1 $$ \times $$ 10$$-$$18 g cm s$$-$$1. The uncertainty in electron velocity is (mass of an electron is 9 $$ \times $$ 10$$-$$28 g)
A
1 $$ \times $$ 105 cm s$$-$$1
B
1 $$ \times $$ 1011 cm s$$-$$1
C
1 $$ \times $$ 109 cm s$$-$$1
D
1 $$ \times $$ 106 cm s$$-$$1
3
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
If uncertainty in position and momentum are equal, then uncertainty in velocity is
A
$${1 \over m}\sqrt {{h \over \pi }} $$
B
$$\sqrt {{h \over \pi }} $$
C
$${1 \over {2m}}\sqrt {{h \over \pi }} $$
D
$$\sqrt {{h \over {2\pi }}} $$
4
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
Consider the following sets of quantum numbers :

n l m s
(i) 3 0 0 +1/2
(ii) 2 2 1 +1/2
(iii) 4 3 -2 -1/2
(iv) 1 0 -1 -1/2
(v) 3 2 3 +1/2


Which of the following sets of quantum number is not possible ?
A
(i), (ii), (iii) and (iv)
B
(ii), (iv) and (v)
C
(i) and (iii)
D
(ii), (iii) and (iv)
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