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Chemistry 9 Chapter 2 Structure of Atom -2
1.
Electrons in an atom are present?
a) outside the orbits
b) in nucleus
c) none of these
d) in orbits
2.
Rutherford's model resembles our?
a) digestive system
b) solar system
c) nervous system
d) respiratory system
3.
In Rutherford atomic model, the electrons form a?
a) continous spectrum
b) none of these
c) both of these
d) line spectrum
4.
If a revolving electron emits energy continuously, it should form a?
a) no spectrum
b) continous spectrum
c) both spectra
d) line spectrum
5.
Who proposed a new atomic model in response to the atomic model of Rutherford?
a) Aristotle
b) Plato
c) Mendel
d) Bohr
6.
Neil Bohr proposed his atomic model in?
a) 1911
b) 1910
c) 1900
d) 1913
7.
According to Bohr, the energy of electron in an orbit is ___ to its distance from the nucleus?
a) inversly proportional
b) always equal
c) directly proportional
d) none of these
8.
According to Bohr, light is absorbed when the electron?
a) jumps to a higher energy orbit
b) falls into the nucleus
c) falls into a lower energy orbit
d) is fixed in an orbit
9.
According to Bohr, when the electron falls to a lower energy orbit, it?
a) emitts energy
b) all are correct
c) does not radiate energy
d) absorbs energy
10.
The energy difference of the two orbits is?
a) E
2+
E
1
b) E
1+
E
2
c) E
2-
E
1+
d) E
1-
E
2
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