Atomic Structure Test 8

Total Questions:50 Total Time: 60 Min

Remaining:

 

Questions 1 of 50

Question:The radius of an atom is of the order of

Answers Choices:

\({10^{ - 10}}cm\)

\({10^{ - 13}}cm\)

\({10^{ - 15}}cm\)

\({10^{ - 8}}cm\)

Questions 2 of 50

Question:Neutron possesses

Answers Choices:

Positive charge

Negative charge

No charge

All are correct

Questions 3 of 50

Question:Splitting of signals is caused by

Answers Choices:

Proton

Neutron

Positron

Electron

Questions 4 of 50

Question:The proton and neutron are collectively called as

Answers Choices:

Deutron

Positron

Meson

Nucleon

Questions 5 of 50

Question:The number of unpaired electrons in the \(F{e^{2 + }}\) ion is

Answers Choices:

0

4

6

3

Questions 6 of 50

Question:A sodium cation has different number of electrons from

Answers Choices:

\({O^{2 - }}\)

\({F^ - }\)

\(L{i^ + }\)

\(A{l^{ + 3}}\)

Questions 7 of 50

Question:If the atomic weight of an element is 23 times that of the lightest element and it has 11 protons, then it contains

Answers Choices:

11 protons, 23 neutrons, 11 electrons

11 protons, 11 neutrons, 11 electrons

11 protons, 12 neutrons, 11 electrons

11 protons, 11 neutrons, 23 electrons

Questions 8 of 50

Question:Which of the following oxides of nitrogen is isoelectronic with \(C{O_2}\)

Answers Choices:

\(N{O_2}\)

\({N_2}O\)

\(NO\)

\({N_2}{O_2}\)

Questions 9 of 50

Question:Nuclei tend to have more neutrons than protons at high mass numbers because

Answers Choices:

Neutrons are neutral particles

Neutrons have more mass than protons

More neutrons minimize the coulomb repulsion

Neutrons decrease the binding energy

Questions 10 of 50

Question:Which one of the following is not isoelectronic with \({O^{2 - }}\)

Answers Choices:

\({N^{3 - }}\)

\({F^ - }\)

\(T{l^ + }\)

\(N{a^ + }\)

Questions 11 of 50

Question:The nucleus of tritium contains

Answers Choices:

1 proton + 1 neutron

1 proton + 3 neutron

1 proton + 0 neutron

1 proton + 2 neutron

Questions 12 of 50

Question:Which one of the following groupings represents a collection of isoelectronic species

Answers Choices:

\(N{a^ + },\,C{a^{2 + }},M{g^{2 + }}\)

\({N^{3 - }},\,{F^ - },\,N{a^ + }\)

\(Be,\,A{l^{3 + }},\,C{l^ - }\)

\(C{a^{2 + }},\,C{s^ + },\,Br\)

Questions 13 of 50

Question:Rutherford's alpha particle scattering experiment eventually led to the conclusion that

Answers Choices:

Mass and energy are related

Electrons occupy space around the nucleus

Neutrons are buried deep in the nucleus

The point of impact with matter can be precisely determined

Questions 14 of 50

Question:Bohr's model can explain

Answers Choices:

The spectrum of hydrogen atom only

Spectrum of atom or ion containing one electron only

The spectrum of hydrogen molecule

The solar spectrum

Questions 15 of 50

Question:When an electron jumps from lower to higher orbit, its energy

Answers Choices:

Increases

Decreases

Remains the same

None of these

Questions 16 of 50

Question:Experimental evidence for the existence of the atomic nucleus comes from

Answers Choices:

Millikan's oil drop experiment

Atomic emission spectroscopy

The magnetic bending of cathode rays

Alpha scattering by a thin metal foil

Questions 17 of 50

Question:The first use of quantum theory to explain the structure of atom was made by

Answers Choices:

Heisenberg

Bohr

Planck

Einstein

Questions 18 of 50

Question:An electronic transition from 1s orbital of an atom causes

Answers Choices:

Absorption of energy

Release of energy

Both release or absorption of energy

Unpredictable

Questions 19 of 50

Question:Energy of electron of hydrogen atom in second Bohr orbit is

Answers Choices:

\( - 5.44 \times {10^{ - 19}}J\)

\( - 5.44 \times {10^{ - 19}}\,kJ\)

\( - 5.44 \times {10^{ - 19}}\,cal\)

\( - 5.44 \times {10^{ - 19}}\,eV\)

Questions 20 of 50

Question:If change in energy \((\Delta E) = 3 \times {10^{ - 8}}J,\,\,h = 6.64 \times {10^{ - 34}}J{\rm{ - }}s\) and \(c = 3 \times {10^8}\,m/s,\) then wavelength of the light is

Answers Choices:

\(6.36 \times {10^3}{\rm{{\AA}}}\)

\(6.36 \times {10^5}{\rm{{\AA}}}\)

\(6.64 \times {10^{ - 8}}{\rm{{\AA}}}\)

\(6.36 \times {10^{18}}{\rm{{\AA}}}\)

Questions 21 of 50

Question:The mass of a photon with a wavelength equal to \(1.54 \times {10^{ - 8}}cm\) is

Answers Choices:

\(0.8268 \times {10^{ - 34}}kg\)

\(1.2876 \times {10^{ - 33}}kg\)

\(1.4285 \times {10^{ - 32}}kg\)

\(1.8884 \times {10^{ - 32}}kg\)

Questions 22 of 50

Question:The wave nature of an electron was first given by

Answers Choices:

De-Broglie

Heisenberg

Mosley

Sommerfield

Questions 23 of 50

Question:Calculate de-Broglie wavelength of an electron travelling at 1% of the speed of light

Answers Choices:

\(2.73 \times {10^{ - 24}}\)

\(2.42 \times {10^{ - 10}}\)

\(242.2 \times {10^{10}}\)

None of these

Questions 24 of 50

Question:The equation \(\Delta x.\Delta p \ge \frac{h}{{4\pi }}\) shows

Answers Choices:

de-Broglie relation

Heisenberg’s uncertainty principle

Aufbau principle

Hund’s rule

Questions 25 of 50

Question:The correct ground state electronic configuration of chromium atom is

Answers Choices:

\([Ar]\,3{d^5}\,4{s^1}\)

\([Ar]\,3{d^4}4{s^2}\)

\([AR]3{d^6}4{s^0}\)

\([Ar]4{d^5}4{s^1}\)

Questions 26 of 50

Question:2p orbitals have

Answers Choices:

\(n = 1,\,l = 2\)

\(n = 1,\,l = 0\)

\(n = 2,\,l = 1\)

\(n = 2,\,l = 0\)

Questions 27 of 50

Question:Chromium has the electronic configuration

Answers Choices:

\(4{s^1}3{d^5}\) rather than \(4{s^2}3{d^4}\) because\(4s\) and \(3d\) have the same energy

\(4s\) has a higher energy than \(3d\)

\(4{s^1}\) is more stable than \(4{s^2}\)

\(4{s^1}3{d^5}\) half-filled is more stable than \(4{s^2}3{d^4}\)

Questions 28 of 50

Question:The electronic configuration of calcium ion \((C{a^{2 + }})\) is

Answers Choices:

\(1{s^2},2{s^2}2{p^6},3{s^2}3{p^6},4{s^2}\)

\(1{s^2},2{s^2}s{p^6},3{s^2}3{p^6},4{s^1}\)

\(1{s^2},2{s^2}2{p^6},3{s^2}3{p^6}3{d^2}\)

\(1{s^2},2{s^2}s{p^6},3{s^2}3{p^6}3{d^5}\)

\(1{s^2},2{s^2}2{p^6},3{s^2}3{p^6},4{s^0}\)

Questions 29 of 50

Question:The number of radial nodes of 3s and 2p orbitals are respectively.

Answers Choices:

2, 0

0, 2

1, 2

2, 1

Questions 30 of 50

Question:Which of the sub-shell is circular

Answers Choices:

\(4s\)

\(4f\)

\(4p\)

\(4d\)

Questions 31 of 50

Question:For \(p\)-orbital, the magnetic quantum number has value

Answers Choices:

2

4, – 4

1, 0, +1

0

Questions 32 of 50

Question:For \(n = 3\) energy level, the number of possible orbitals (all kinds) are

Answers Choices:

1

3

4

9

Questions 33 of 50

Question:How many electrons can be fit into the orbitals that comprise the \({3^{rd}}\) quantum shell \(n = 3\)

Answers Choices:

2

8

18

32

Questions 34 of 50

Question:If the value of azimuthal quantum number is 3, the possible values of magnetic quantum number would be

Answers Choices:

0, 1, 2, 3

0, – 1, – 2, – 3

0, \( \pm \)1, \( \pm \)2, \( \pm \) 3\( \pm \)

1, \( \pm \)2, \( \pm \)3

Questions 35 of 50

Question:The order of filling of electrons in the orbitals of an atom will be

Answers Choices:

\(3d,\,4s,\,4p,\,4d,\,5s\)

\(4s,\,3d,\,4p,\,5s,\,4d\)

\(5s,\,4p,\,3d,\,4d,\,5s\)

\(3d,\,4p,\,4s,\,4d,\,5s\)

Questions 36 of 50

Question:The quantum number which may be designated by \(s,\,p,\,d\) and \(f\) instead of number is

Answers Choices:

\(n\)

\(l\)

\({m_l}\)

\({m_s}\)

Questions 37 of 50

Question:The correct electronic configuration of \(Ti(Z = 22)\) atom is

Answers Choices:

\(1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}4{s^2}3{d^2}\)

\(1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^4}\)

\(1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^4}\)

\(1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}4{s^1}3{d^3}\)

Questions 38 of 50

Question:Which of the following configuration is correct for iron

Answers Choices:

\(1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^5}\)

\(1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}4{s^2}3{d^5}\)

\(1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}4{s^2}3{d^7}\)

\(1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}4{s^2}3{d^6}\)

Questions 39 of 50

Question:Which one of the following set of quantum numbers is not possible for \(4p\) electron

Answers Choices:

\(n = 4,\,l = 1,\,m = - 1,\,s = + \frac{1}{2}\)

\(n = 4,\,l = 1,\,m = 0,\,s = + \frac{1}{2}\)

\(n = 4,\,l = 1,\,m = 2,\,s = + \frac{1}{2}\)

\(n = 4,\,l = 1,\,m = - 1,\,s = + \frac{1}{2}\)

Questions 40 of 50

Question:Which of the following orbital is not possible

Answers Choices:

3 f

4 f

5 f

6 f

Questions 41 of 50

Question:The outer electronic structure \(3{s^2}3{p^5}\) is possessed by

Answers Choices:

Cl

O

Ar

Br

Questions 42 of 50

Question:The quantum number ‘m’ of a free gaseous atom is associated with

Answers Choices:

The effective volume of the orbital

The shape of the orbital

The spatial orientation of the orbital

The energy of the orbital in the absence of a magnetic field

Questions 43 of 50

Question:The number of orbitals present in the shell with \(n = 4\) is

Answers Choices:

16

8

18

32

Questions 44 of 50

Question:Which of the following electronic configuration is not possible

Answers Choices:

\(1{s^2}2{s^2}\)

\(1{s^2},2{s^2}2{p^6}\)

\([Ar]\,3{d^{10}},4{s^2}4{p^2}\)

\(1{s^2},2{s^2}2{p^2},3{s^1}\)

Questions 45 of 50

Question:Number of unpaired electrons in the ground state of beryllium atom is

Answers Choices:

2

1

0

All the above

Questions 46 of 50

Question:How many unpaired electrons are present in \(N{i^{2 + }}\) cation (atomic number = 28)

Answers Choices:

0

2

4

6

Questions 47 of 50

Question:The total number of electrons present in all the \(p\)-orbitals of bromine are

Answers Choices:

Five

Eighteen

Seventeen

Thirty five

Questions 48 of 50

Question:Which of the following has the maximum number of unpaired electrons

Answers Choices:

\(M{g^{2 + }}\)

\(T{i^{3 + }}\)

\({V^{3 + }}\)

\(F{e^{2 + }}\)

Questions 49 of 50

Question:Aufbau principle is not satisfied by

Answers Choices:

\(Cr\) and \(Cl\)

\(Cu\) and \(Ag\)

\(Cr\) and \(Mg\)

\(Cu\) and \(Na\)

Questions 50 of 50

Question:Which of the following explains the sequence of filling the electrons in different shells

Answers Choices:

Hund's rule

Octet rule

Aufbau principle

All of these