1
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
The radioistope, tritium ($${}_1^3$$H) has a half-life of 12.3 years. If the initial amount of tritium is 32 mg, how many milligrams of it would remain after 49.2 years?
A
1 mg
B
2 mg
C
4 mg
D
8 mg
2
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
$${}_{92}^{235}$$U, nucleus absorbs a neutron and distintegrate in $${}_{54}^{139}$$Xe, $${}_{38}^{94}$$Sr and $$x$$ so, what will be product $$x$$?
A
3-neutrons
B
2-neutrons
C
$$\alpha $$-particle
D
$$\beta $$-particle
3
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
A human body required 0.01 m activity of radioactive substance after 24 hours. Half life of radioactive substance is 6 hours. Then inhection of maximum activity of radioactive substance that can be injected is
A
0.08
B
0.04
C
0.16
D
0.32
4
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
If a $${}_b^aX$$ species emits first a position, then two a and two b particles and in the last, one a, is also emitted and gets converts to $${}_d^c$$Y species. So correct relation is
A
c = a $$-$$ 12, d = b $$-$$ 5
B
c = a $$-$$ 5, d = b $$-$$ 1
C
c = a $$-$$ 6, d = b $$-$$ 0
D
c = a $$-$$ 4, d = b $$-$$ 2
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