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11th CBSE
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Time taken for an electron to complete one revolution in the Bohr orbit of hydrogen atom is

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Important Questions on Structure of Atom

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11th CBSE
IMPORTANT
Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 81
Which is a wrong statement?
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11th CBSE
IMPORTANT
Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 82
Which of the following has maximum spin?
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11th CBSE
IMPORTANT
Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 83
A gas absorbs a photon of 355 nm and emits at two wavelengths. If one of the emissions is at 680 nm, the other is at :
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11th CBSE
IMPORTANT
Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 84
Frequency of the X-rays emitted by an element is 100 s-1. If constants in the Moseley equation are a=b=1, the element will be
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11th CBSE
IMPORTANT
Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 85
The ratio of specific charge of an electron to that of a hydrogen ion is
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11th CBSE
IMPORTANT
Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 86
If  E1, E2 and E3 represent respectively the kinetic energies of an electron, an α-particle and a proton each having same de-Broglie wavelength, then
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11th CBSE
IMPORTANT
Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 87

As electron moves away from the nucleus, its

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11th CBSE
IMPORTANT
Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 88
In Bohr's model of hydrogen atom, the period of revolution of an electron in the 1st orbit to that in the 2nd orbit are in the ratio