Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 2>Q 13

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The ratio of radius of two different orbits in a $H$ -atom is $4 : 9$ . Then, the ratio of the frequency of revolution of electron in these orbits is

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Important Questions on Structure of Atom

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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 2>Q 14

The ratio of the time period of electrons in second Bohr orbit of

{He}^{+}

and fourth Bohr orbit of

{Li}^{2 +}

is

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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 2>Q 15

If the ionisation potential of a hydrogen like species is

20 V,

its first excitation potential will be

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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 2>Q 16

The amount of energy required to excite the electron from third to fourth Bohr's orbit in

B^{4 +}

will be

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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 2>Q 17

A single electron orbits a stationary nucleus of charge

+ Ze,

where

Z

is a constant. It requires

47.2 eV

to excite an electron from the second Bohr's orbit to third Bohr's orbit, find the value of

Z

.

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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 2>Q 18

The ionization energy of

{He}^{+}

is

19.6 \times 10^{- 18} J {atom}^{- 1}

. The energy of the first stationary state of

{Li}^{+ 2}

will be

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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 2>Q 19

The energy required to pull out an electron from the first orbit of hydrogen atom to infinity is

100 units

. The amount of energy needed to pull out the electron from the second orbit to infinity is

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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 2>Q 20

If the first excitation potential of a hypothetical

H -

like atom is

10.2 x V,

then the value of the second excitation energy is about

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Alpha Question Bank for Medical: Chemistry>Chapter 2 - Structure of Atom>Exercise 2>Q 21

The kinetic energy of the electron present in the ground state of

{Li}^{2 +}

ion is represented by