1
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
2
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
3
AIPMT 2014
MCQ (Single Correct Answer)
+4
-1
Hydrogen atom in ground state is excited by a monochromatic radiation of $$\lambda $$ = 975 $$\mathop A\limits^ \circ $$. Number of spectral lines in the resulting spectrum emitted will be
A
3
B
2
C
6
D
0 10
4
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
How does the Binding Energy per nucleon vary with the increase in the number of nucleons ?
A
Decrease continuously with mass number.
B
First decreases and then increases with increase in mass number.
C
First increases and then decreases with increase in mass number.
D
increases continuously with mass number.
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