1
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
If radius of the $${}_{13}^{27}$$ Al nucleus is taken to be RAl, then
the radius of $${}_{53}^{125}$$Te nucleus is nearly
A
$${3 \over 5}{R_{Al}}$$
B
$${\left( {{{13} \over {53}}} \right)^{1/3}}{R_{Al}}$$
C
$${\left( {{{53} \over {13}}} \right)^{1/3}}{R_{Al}}$$
D
$${5 \over 3}{R_{Al}}$$
2
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Consider 3rd orbit of He+ (Helium), using non-relativistic approach, the speed of electron in this orbit will be [given K = 9 $$ \times $$ 109 constant, Z = 2 and h (Planck's Constant) = 6.6 $$ \times $$ 10$$-$$34 J s]
A
0.73 $$ \times $$ 106 m/s
B
3.0 $$ \times $$ 108 m/s
C
2.92 $$ \times $$ 106 m/s
D
1.46 $$ \times $$ 106 m/s
3
AIPMT 2014
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
A radioactive X with a half life 1.4 $$ \times $$ 109 years decays to Y which is stable. A sample of the rock from a cave was found to contain X and Y in the ratio 1 : 7. The age of the rock is
A
1.96 $$ \times $$ 109 years
B
3.92 $$ \times $$ 109 years
C
4.20 $$ \times $$ 109 years
D
8.40 $$ \times $$ 109 years
4
AIPMT 2014
MCQ (Single Correct Answer)
+4
-1
The binding energy per nucleon of and nuclei are 5.60 MeV and 7.06 MeV respectively. In the nuclear reaction

$${}_3^7Li + {}_1^1H \to {}_2^4He + _2^4He + Q$$

the value of energy Q released is
A
19.6 MeV
B
$$-$$ 2.4 MeV
C
8.4 MeV
D
17.3 MeV
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