1
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1

The half life of a first order reaction is 2000 years. If the concentration after 8000 years is 0.02 M, then the initial concentration was :

A
0.04 M
B
0.16 M
C
0.32 M
D
0.08 M
2
AIPMT 2005
MCQ (Single Correct Answer)
+4
-1
A nuclide of an alkaline earth metal undergoes radioactive decay by emission of the periodic table to which the resulting daughter element would belong is
A
Gr.13
B
Gr. 17
C
Gr. 14
D
Gr. 16
3
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
The radioactive isotope $${}_{27}^{60}$$Co which is used in the treatment of cancer can be made by (n.p) reaction. For this reaction the tarfet nucleus is
A
$$_{28}^{59}$$ Ni
B
$$_{27}^{59}$$ Co
C
$$_{28}^{60}$$ Ni
D
$$_{27}^{60}$$ Co
4
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
NEET Subjects
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
CBSE
Class 12