Chemistry/Chemistry MCQ Question - Atomic Sample Test,Sample questions

Question:
2nd orbit is _______ away from nucleus of H-atom as compared to 1st orbit is

1.2-times

2.3-times

3.4-times

4.6 times

Posted Date:-2021-09-30 05:30:02


Question:
A fast moving neutron can eject from nitrogen

1.? = rays

2.? = rays

3.? = rays

4.electrons

Posted Date:-2021-09-30 05:30:02


Question:
All of the following were theorized by Bohr in his description of the atom except

1.Angular momentum of electrons in multiples of h/2?

2.Electrons revolve in discrete circular orbits

3.Energy of each electron is directly proportional to n2

4.Electrons radiate energy continuously in a given orbit.

Posted Date:-2021-09-30 05:30:02


Question:
Angle of deflection was studied by

1.Hitorff

2.Stoney

3.William Crookes

4.J.Perrin

Posted Date:-2021-09-30 05:30:02


Question:
Angular momentum of an electron

1.n2h/2?

2.nk2/2?

3.nh/4?

4.nh/2?

Posted Date:-2021-09-30 05:30:02


Question:
Atom cannot be divided into simple unitstheorized by

1.Rutherford

2.Dalton

3.Bohr

4.Schrodinger

Posted Date:-2021-09-30 05:30:02


Question:
Atom with higher atomic number produces X-rays of

1.Shorter wavelength

2.Larger wavelength

3.X-ray not produced

4.All are possible

Posted Date:-2021-09-30 05:30:02


Question:
Atomic orbits having same evergy are called

1.Degenerate orbitals

2.Bonding molecular orbitals

3.Anti bonding molecular orbitals

4.Half filled orbitals

Posted Date:-2021-09-30 05:30:02


Question:
Centrifugal forces are balanced in atom by

1.Attractive forces

2.Repulsive force

3.Electrons

4.Neutrons

Posted Date:-2021-09-30 05:30:02


Question:
Charge of electron was measured by

1.J.J Thomson

2.Millikan

3.Rutherford

4.Perrin

Posted Date:-2021-09-30 05:30:02


Question:
Colour of fluorescene produced by cathode rays depends upon

1.Temperature

2.Pressure

3.Volume

4.Composition of glass

Posted Date:-2021-09-30 05:30:02


Question:
Electronic configuration of K is

1.[Ar]4s2

2.[Ar]4s1

3.[Kr]5s1

4.[He]2s1

Posted Date:-2021-09-30 05:30:02


Question:
Free neutron changes into proton with the emission of

1.Neutrino

2.Electron

3.Both a & b

4.Meson

Posted Date:-2021-09-30 05:30:02


Question:
Increase in atomic number is observed during

1.Alpha emission

2.Beta emission

3.Both a & b

4.Radioactivity

Posted Date:-2021-09-30 05:30:02


Question:
Milikan used __________ in his atomizer

1.Milk

2.Positron

3.Neutron

4.None of above has such capability

Posted Date:-2021-09-30 05:30:02


Question:
Milikan used __________ in his atomizer

1.Milk

2.Honey

3.Oil

4.Water

Posted Date:-2021-09-30 05:30:02


Question:
Neutrons moving with an energy of 1.2 MeV are called

1.Fast neutrons

2.Slow neutrons

3.Moderate neutrons

4.All are possible

Posted Date:-2021-09-30 05:30:02


Question:
Pfund series are produced in the spectrum of hydrogen atom

1.when electrons jump down to 2nd- orbit

2.when electrons jump down to 3rd- orbit

3.when electrons jump down to 4th- orbit

4.when electrons jump down to 5th- orbit

Posted Date:-2021-09-30 05:30:02


Question:
Plancks equation is

1.E = mc2

2.mvr = nh/2?

3.E = h?

4.? = h/mv

Posted Date:-2021-09-30 05:30:02


Question:
Planks theory says energy is emitted

1.In continuous manner

2.Discontinuous manner

3.Simultaneously

4.In the form of heat

Posted Date:-2021-09-30 05:30:02


Question:
Positive rays are produced

1.By burning of gas

2.By cooling of the gas

3.By the bombardment of cathode rays on gas molecules

4.From anode like cathode rays produced from cathode

Posted Date:-2021-09-30 05:30:02


Question:
Positive rays give flash on

1.AgNO3 plate

2.AgCl plate

3.ZnO

4.ZnS

Posted Date:-2021-09-30 05:30:02


Question:
Pressure in gas discharge tube was kept

1.10 torr

2.1 torr

3.0.1 torr

4.0.01 torr

Posted Date:-2021-09-30 05:30:02


Question:
Quantum number which tells the energy of electron is

1.n

2.1

3.m

4.s

Posted Date:-2021-09-30 05:30:02


Question:
Radius of the third shell of H-atom is

1.5.761 A?

2.4.761 A?

3.6.671 A?

4.3.716 A?

Posted Date:-2021-09-30 05:30:02


Question:
Rutherford bombarded ______________ particles in discovery of nucleus

1.Gamma-rays

2.Alpha-rays

3.Beta-rays

4.X-rays

Posted Date:-2021-09-30 05:30:02


Question:
Rutherfords planet like structure was defective and unsatisfactory because

1.Moving e- accelerate towards the nucleus

2.Continuous spectrum

3.behavior of electron remain unexplained

4.all

Posted Date:-2021-09-30 05:30:02


Question:
Sommerfelds modification in Bohrs model is

1.Orbit is cylindrical

2.Orbit is elliptical

3.Orbit is longitudinal

4.Orbit is asymmetrical

Posted Date:-2021-09-30 05:30:02


Question:
Space around nucleus where finding probability of electrons is maximum is called

1.Orbital

2.Orbit is elliptical

3.subshell

4.Electron cloud

Posted Date:-2021-09-30 05:30:02


Question:
Spectrum is produced due to

1.Different wavelength

2.Different colours

3.Different intensities

4.all have little contribution

Posted Date:-2021-09-30 05:30:02


Question:
Splitting of spectral lines when atom is subjected to magnetic field is called

1.Zeemans effect

2.Starks effect

3.Photo electric effect

4.Compton effect

Posted Date:-2021-09-30 05:30:02


Question:
Splitting of spectral lines when atoms are subjected to strong electric filed is called

1.Zeeman effect

2.Stark effect

3.Photoelectric effect

4.Compton effect

Posted Date:-2021-09-30 05:30:02


Question:
The atomic number of an element having maximum number of unpaired electrons in p-subshell is

1.7

2.10

3.12

4.16

Posted Date:-2021-09-30 05:30:02


Question:
The correct electronic configuration of Cu is

1.[Ar]4s1

2.[Ar]4s2

3.[Ar]3d104s1

4.[Ar]3d94s2

Posted Date:-2021-09-30 05:30:02


Question:
The letters s p d and f are used to represent which quantum numbers

1.Principal

2.Azimuthal

3.Magnetic

4.Spin

Posted Date:-2021-09-30 05:30:02


Question:
The magnetic quantum number (QN) has its values determined directly by the value of

1.Principal (QN)

2.Azimuthal (QN)

3.Spin (QN)

4.Both a & b

Posted Date:-2021-09-30 05:30:02


Question:
The maximum number of electron in a sub shell with ? = 3fs

1.6

2.10

3.14

4.18

Posted Date:-2021-09-30 05:30:02


Question:
The maximum number of orbitals present in a subshell that is represented by Azimuthal quantum number = 3 will be

1.1

2.3

3.5

4.7

Posted Date:-2021-09-30 05:30:02


Question:
The number of fundamental particles in an atom of the lightest isotope carbon are

1.6

2.12

3.18

4.20

Posted Date:-2021-09-30 05:30:02


Question:
The relationship between energy of a photon of light and its frequency is given by

1.de-Broglie duel nature of matter

2.Bohrs model

3.Plancks Quantum theory

4.Rutherfords atomic model

Posted Date:-2021-09-30 05:30:02


Question:
The value of e/m ratio of electron is

1.6.02 x 1023 C/kg

2.1.7588 x 1020 C/kg

3.9.1095 x 10-31 C/kg

4.1.7588 x 1011 C/kg

Posted Date:-2021-09-30 05:30:02


Question:
The velocity of the photon

1.Is independent of wavelength

2.Depends upon source

3.Depends upon its frequency

4.Equals to the square of amplitude

Posted Date:-2021-09-30 05:30:02


Question:
Wavelength of electron was verified by

1.Moseley

2.Davisson and Germer

3.Einstein

4.Roentgen

Posted Date:-2021-09-30 05:30:02


Question:
When 6d orbital is complete the entering electron goes into

1.7f

2.7s

3.7p

4.7d

Posted Date:-2021-09-30 05:30:02


Question:
When an atom absorbs energy the lines in the spectrum will appear which are

1.Brighter

2.Darker

3.Colourless

4.Hard to locate

Posted Date:-2021-09-30 05:30:02


Question:
When electron jump into orbit 1 then series obtained is

1.Lyman

2.Paschen

3.Pfund

4.Brackett

Posted Date:-2021-09-30 05:30:02


Question:
When electrons collide with heavy metals than ______ are produced.

1.Beta-rays

2.Alpha-rays

3.X-rays

4.Gamma-rays

Posted Date:-2021-09-30 05:30:02


Question:
Which one is not true about cathode rays?

1.9.11x10-31 Kg

2.Cast shadow

3.Heat up the platinum foil

4.Cannot ionize

Posted Date:-2021-09-30 05:30:02


Question:
Which one of the following explain the shape of orbitals

1.Principal of quantum number

2.Azimuthal quantum number

3.Magnetic quantum number

4.Spin quantum number

Posted Date:-2021-09-30 05:30:02


Question:
____________ can expel proteons from paraffins

1.Electron

2.Positron

3.Neutron

4.None of above has such capability

Posted Date:-2021-09-30 05:30:02


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