1
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
A nucleus represented by the symbol $${}_Z^AX$$ has
A
Z neutrons and A $$-$$ Z protons
B
Z protons and A $$-$$ Z neutrons
C
Z protons and A neutrons
D
A protons and Z $$-$$ A neutrons
2
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
The Bohr model of atoms
A
Assumes that the angular momentum of electrons is quantized.
B
Uses Einstein's photoelectric equation.
C
Predicts continuous emission spectra fror atoms.
D
Predicts the same emission spectra for all types of atoms.
3
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
If in a nuclear fusion process the masses of the fusing nuclei be m1 and m2 and the mass of the resultant nucleus be m3, then
A
m3 = m1 + m2
B
m3 = $$\left| {{m_1} - {m_2}} \right|$$
C
m3 < (m1 + m2)
D
m3 > (m1 + m2)
4
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
The half life of radian is about 1600 years. Of 100 g of radium existing now, 25 g will remain unchanged after
A
4800 years
B
6400 years
C
2400 years
D
3200 years
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