# General Science/Basic Science physics Atom Models Sample Test,Sample questions

## Question: 5.The wave number is the number

1.of waves that cross in one second

2.associated with the orbit

3.of waves per unit length

4.of spectral lines produced

1.2

2.4

3.6

4.8

1.h/4?

2.h/2?

3.2?/h

4.h/?

1.stable

2.unstable

3.meta stable

4.indivisible

## Question: According to Rutherford atom model the electrons are revolving around the nucleus so that centripetal force is provided by

1.gravitational force

2.electrostatic force of attraction between

3.electron and nucleus

4.Van der Walls force

## Question: An atom emits a photon when one of its orbital electrons

1.jumps from a higher to a lower energy level

2.jumps from a lower to a higher energy level

3.is removed by the photoelectric effect

4.is at rest

1.Prout

2.Dalton

3.Thomson

4.Rutherford

## Question: For ionizing an excited hydrogen atom the energy required in eV will be

1.a little less than 13.6 eV

2.13.6 eV

3.more than 13.6 eV

4.3.4 eV or loss

1.1 : 4 : 9 : 25

2.1 : 4 : 9 : 16

3.1 : 2 : 4 : 6

4.1 : 3 : 5 : 7

1.Lyman series

2.Balmer series

3.Paschen series

4.Bracket series

1.fourth orbit

2.second orbit

3.third orbit

4.first orbit

1.infrared

2.ultraviolet

3.visible

4.far infrared

## Question: Plancks constant is equal to

1.6.64 ? 10-34 J/s

2.6.64 ? 10-34 Js

3.6.64 ? 1030 J/s

4.6.64 ? 1034 Js

## Question: Prouts suggestion on atomic structure was not accepted because

1.the atomic weights of many elements are equal to multiples of the atomic weight of hydrogen

2.the atomic weights of many elements differed from being multiples of atomic weight of hydrogen

3.the atomic weights of all elements are multiples of the atomic weights of hydrogen

4.the atomic weights of all elements are same irrespective of the atomic weight of hydrogen

## Question: The electron in a hydrogen atom makes a transition from an exited state to the ground state. Then (a) its kinetic energy increases (b) its potential energy decreases (c) its angular momentum increases (d) its linear momentum increases. Which of the above statements are correct

1.(a) (b) (c) and (d)

2.(a) (b) and (c) only

3.(a) (b) and (d) only

4.(a) and (b) only

1.136 eV

2.1.36 eV

3.13.6 eV

4.0.136 eV

## Question: The energy required to remove an electron from the orbit of hydrogen atom is called

1.nuclear force

2.ionization energy

3.potential energy

4.kinetic energy

1.13.60 eV

2.3.40 eV

3.1.51 eV

4.2.00 eV

1.54.4 eV

2.-6.8 eV

3.-27.2 eV

4.-3.4 eV

1.4

2.3

3.2

4.1

1.r

2.1/r

3.r2

4.1/ r2

1.10-11 m

2.10-12 m

3.10-13 m

4.10-14 m

## Question: The nucleus of an atom consists of

1.positive charge

2.negative charge

3.both positive and negative charge

4.no charged particles

## Question: The potential energy of an electron in a given orbit is

1.equal to its kinetic energy

2.one half of its kinetic energy

3.twice its kinetic energy

4.twice its kinetic energy but negative

## Question: The radii of the Bohrs orbit of hydrogen atom are proportional to

1.integer

2.square of integers

3.square root of integers

4.reciprocal of square of integers

## Question: The second line of Balmer series in the hydrogen spectrum occurs due to the transition of electrons form the

1.fourth to the third orbit

2.third to the second orbit

3.fourth to the second orbit

4.third to the first orbit

1.Balmer series

2.Lyman series

3.Paschen series

4.Pfund series

1.zero

2.negative

3.positive

4.infinite

## Question: The value of Rydbergs constant is

1.1.094 ? 107 m-1

2.1.094 ? 108 m-1

3.10.94 ? 107 m-1

4.109.4 ? 107 m-1

1.visible

2.ultraviolet

3.far infrared

4.infrared

1.2s2

2.2s

3.s2

4.2Ls

## Question: When the electron of hydrogen atom jumps from any of the outer orbits to the first orbit the series of spectral lines emitted is called

1.Balmer series

2.Paschen series

3.Brackett series

4.Lyman series

1.486.1 �

2.4861 �

3.48.61 �

4.4500 �

## Question: Which of the following is similar to the solar system

1.Rutherford atom model

2.Dalton atom model

3.Thomson atom model

4.Prout atom model

1.Bracket series

2.Pfund series

3.Balmer series

4.Lyman series

## More MCQS

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