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AIIMS 2013 Chemistry Question Paper for free online practice with solutions
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© examsnet.com
Question : 32
Total: 60
A particle is moving 3 times faster than the speed of electron. If the ratio of wavelength of particle and electron is
1.8
×
10
−
4
,
then particle is
Neutron
α-particle
Deuteron
Tritium
Validate
Solution:
Given :
λ
particle
λ
electron
=
1.8
×
10
−
4
and
v
particle
v
electron
=
3
According to de-Broglie equation,
λ
=
h
m
v
λ
particle
λ
electron
=
h
m
particle
×
v
particle
×
m
electron
×
v
electron
h
=
m
electron
m
particle
×
v
electron
v
particle
⇒
1.8
×
10
−
4
=
9.1
×
10
−
31
k
g
m
particle
×
1
3
Actual mass of neutron is
1.67493
×
10
−
27
k
g
Hence, the particle is neutron.
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