1
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
In the nuclear fusion reaction $$${}_1^2H + {}_1^3H \to {}_2^4He + n$$$
given that the repulsive potential energy between the two nuclei is $$ \sim 7.7 \times {10^{ - 14}}J$$, the temperature at which the gases must be heated to initiate the reaction is nearly
[ Boltzmann's Constant $$k = 1.38 \times {10^{ - 23}}\,J/K$$ ]
A
$${10^7}\,\,K$$
B
$${10^5}\,\,K$$
C
$${10^3}\,\,K$$
D
$${10^9}\,\,K$$
2
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Which of the following cannot be emitted by radioactive substances during their decay ?
A
Protons
B
Neutrinoes
C
Helium nuclei
D
Electrons
3
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
If the binding energy of the electron in a hydrogen atom is $$13.6eV,$$ the energy required to remove the electron from the first excited state of $$L{i^{ + + }}$$ is
A
$$30.6$$ $$eV$$
B
$$13.6$$ $$eV$$
C
$$3.4$$ $$eV$$
D
$$122.4$$ $$eV$$
4
AIEEE 2002
MCQ (Single Correct Answer)
+4
-1
Change Language
If $$13.6$$ $$eV$$ energy is required to ionize the hydrogen atom, then the energy required to remove an electron from $$n=2$$ is
A
$$10.2$$ $$eV$$
B
$$0$$ $$eV$$
C
$$3.4$$ $$eV$$
D
$$6.8$$ $$eV.$$
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