Match the following a Energy of ground state of He + i + 6 . 04 eV b Potential energy of I orbit of H -atom ii - 27 . 2 eV c Kinetic energy of II excited state of He iii 54 . 4 V d lonisation potential of He + iv - 54 . 4 eV

A - ( iv ) , B - ( ii ) , C - ( i ) , D - ( iii )

A - ( i ) , B - ( ii ) , C - ( iii ) , D - ( iv )

A - ( iv ) , B - ( iii ) , C - ( ii ) , D - ( i )

A - ( ii ) , B - ( iii ) , C - ( i ) , D - ( iv )

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In a certain electronic transition in the hydrogen atoms, from an initial state $(1)$ to a final state $(2),$ the difference in the orbital radius $(r_{1} - r_{2})$ is $24$ times the first Bohr radius. Identify the transition.

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Important Questions on Atomic Structure

EASY

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IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 3 - Atomic Structure>EXERCISE>Q 19

The species which has its fifth ionisation potential equal to

340 e V

is:

MEDIUM

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IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 3 - Atomic Structure>EXERCISE>Q 20

Match the following

a	Energy of ground state of ${He}^{+}$	i	$+ 6.04 eV$
b	Potential energy of I orbit of $H$ -atom	ii	$- 27.2 eV$
c	Kinetic energy of II excited state of $He$	iii	$54.4 V$
d	lonisation potential of ${He}^{+}$	iv	$- 54.4 eV$

EASY

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IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 3 - Atomic Structure>EXERCISE>Q 21

$S_{1} :$ Bohr model is applicable for ${Be}^{2 +}$ ion.
$S_{2} :$ Total energy coming out of any light source is an integral multiple of the energy of one photon.
$S_{3} :$ Number of waves present in the unit length is the wave number.

$S_{4} : e / m$ ratio in cathode ray experiment is independent of the nature of the gas.

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IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 3 - Atomic Structure>EXERCISE>Q 22

S_{1} :

Potential energy of the two opposite charge systems increases with the decrease in distance.

S_{2} :

When an electron make transition from higher orbit to lower orbit, it's kinetic energy increases.

S_{3} :

When an electron make transition from lower energy to higher energy state, its potential energy increases.

S_{4} : 11 eV

photon can free an electron from the

1^{st}

excited state of

{He}^{+} -

ion.

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Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 3 - Atomic Structure>EXERCISE>Q 23

Choose the correct relations on the basis of the Bohr's theory.

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KVPY Aptitude Test - Stream SA

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 3 - Atomic Structure>EXERCISE>Q 24

The energy of hydrogen atom in its ground state is

- 13.6 eV

. The energy of the level corresponding to

n = 5

is:

EASY

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IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 3 - Atomic Structure>EXERCISE>Q 25

The total number of lines in the Lyman series of

H

spectrum will be: (where

n =

number of orbits)

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IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 3 - Atomic Structure>EXERCISE>Q 26

The wavelength of a spectral line for an electronic transition is inversely proportional to:

In a certain electronic transition in the hydrogen atoms, from an initial state (1) to a final state (2), the difference in the orbital radius r1-r2 is 24 times the first Bohr radius. Identify the transition.

Important Questions on Atomic Structure

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In a certain electronic transition in the hydrogen atoms, from an initial state $(1)$ to a final state $(2),$ the difference in the orbital radius $(r_{1} - r_{2})$ is $24$ times the first Bohr radius. Identify the transition.