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1
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.
2
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
3
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
The mass of proton is 1.0073 u and that of neutron is 1.0087 u (u = atomic mass unit). The binding energy of $${}_2^4$$ He is
(Given helium nucleus mass $$ \approx $$ 4.0015 u.)
A
0.0305 J
B
0.0305 erg
C
28.4 MeV
D
0.061 u
4
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
The mass number of a nucleus is
A
always less than its atomic number
B
always more than its atomic number
C
sometimes equal to its atomic number
D
sometimes less than and sometimes more than its atomic number
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