1
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
Out of the following which one is not a possible energy for a photon to be emitted by hydrogen atom according to Bohr's atomic model?
A
0.65 eV
B
1.9 eV
C
11.1 eV
D
13.6 eV
2
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Two radioactive nuclei P and Q, in a given sample decay into a stable nucleus R. At time t = 0. number of P species are 4 N0 and that of Q are N0. Half -life of P (for conversion to R) is 1 minute where as that of Q is 2 minutes. Initially there are no nuclei of R present in the sample. When number of nuclei of P and Q are equal, the number of nuclei of R present in the sample would be
A
2 N0
B
3 N0
C
$${{9{N_0}} \over 2}$$
D
$${{5{N_0}} \over 2}$$
3
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
An electron in the hydrogen atom jumps from excited state n to the ground state. The wavelength so emitted illuminates a photosensitive material having work function 2.75 eV. If the stopping potential of the photoelectron is 10 V, then the value of n is
A
2
B
3
C
4
D
5
4
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
The wavelength of the first line of Lyman series for hydrogen atom is equal to that of the second line of Balmer series for a hydrogen like ion. The atomic number Z of hydrogen like ion is
A
3
B
4
C
1
D
2
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