Atomic Structure Test 2

Total Questions:50 Total Time: 60 Min

Remaining:

 

Questions 1 of 50

Question:The fundamental particles present in the nucleus of an atom are

Answers Choices:

Alpha particles and electrons

Neutrons and protons

Neutrons and electrons

Electrons, neutrons and protons

Questions 2 of 50

Question:The order of density in nucleus is

Answers Choices:

\({10^8}kg/cc\)

\({10^{ - 8}}kg/cc\)

\({10^{ - 9}}kg/cc\)

\({10^{12}}kg/cc\)

Questions 3 of 50

Question:Which phrase would be incorrect to use

Answers Choices:

A molecular of a compound

A molecule of an element

An atom of an element

None of these

Questions 4 of 50

Question:Which one of the following pairs is not correctly matched

Answers Choices:

Rutherford-Proton

J.J. Thomsom-Electron

J.H. Chadwick-Neutron

Bohr-Isotope

Questions 5 of 50

Question:The nucleus of the element having atomic number 25 and atomic weight 55 will contain

Answers Choices:

25 protons and 30 neutrons

25 neutrons and 30 protons

55 protons

55 neutrons

Questions 6 of 50

Question:If W is atomic weight and N is the atomic number of an element, then

Answers Choices:

Number of \({e^{ - 1}} = W - N\)

Number of \(_0{n^1} = W - N\)

Number of \(_1{H^1} = W - N\)

Number of \(_0{n^1} = N\)

Questions 7 of 50

Question:An atom has the electronic configuration of \(1{s^2},2{s^2}2{p^6}\), \(3{s^2}3{p^6}3{d^{10}},4{s^2}4{p^5}\). Its atomic weight is 80. Its atomic number and the number of neutrons in its nucleus shall be

Answers Choices:

35 and 45

45 and 35

40 and 40

30 and 50

Questions 8 of 50

Question:Which of the following particles has more electrons than neutrons

Answers Choices:

\(C\)

\({F^ - }\)

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

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

Questions 9 of 50

Question:\(C{O_2}\) is isostructural with

Answers Choices:

\(SnC{l_2}\)

\(S{O_2}\)

\(HgC{l_2}\)

All the above

Questions 10 of 50

Question:The hydride ions \(({H^ - })\) are isoelectronic with

Answers Choices:

\(Li\)

\(H{e^ + }\)

\(He\)

\(Be\)

Questions 11 of 50

Question:\(B{e^{2 + }}\) is isoelectronic with

Answers Choices:

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

\(N{a^ + }\)

\(L{i^ + }\)

\({H^ + }\)

Questions 12 of 50

Question:An isostere is

Answers Choices:

\(NO_2^ - \) and \({O_3}\)

\(NO_2^ - \) and \(PO_4^{3 - }\)

\(C{O_2},\,{N_2}O,\,NO_3^ - \)

\(ClO_4^ - \) and \(OC{N^ - }\)

Questions 13 of 50

Question:Tritium is the isotope of

Answers Choices:

Hydrogen

Oxygen

Carbon

Sulpher

Questions 14 of 50

Question:The atomic number of an element is 35. What is the total number of electrons present in all the p-orbitals of the ground state atom of that element

Answers Choices:

6

11

17

23

Questions 15 of 50

Question:When an electron jumps from \(L\) to \(K\) shell

Answers Choices:

Energy is absorbed

Energy is released

Energy is sometimes absorbed and sometimes released

Energy is neither absorbed nor released

Questions 16 of 50

Question:When beryllium is bombarded with \(\alpha \)-particles, extremely penetrating radiations which cannot be deflected by electrical or magnetic field are given out. These are

Answers Choices:

A beam of protons

\(\alpha \)-rays

A beam of neutrons

X-rays

Questions 17 of 50

Question:When an electron revolves in a stationary orbit then

Answers Choices:

It absorbs energy

It gains kinetic energy

It emits radiation

Its energy remains constant

Questions 18 of 50

Question:A moving particle may have wave motion, if

Answers Choices:

Its mass is very high

Its velocity is negligible

Its mass is negligible

Its mass is very high and velocity is negligible

Questions 19 of 50

Question:The element used by Rutherford in his famous scattering experiment was

Answers Choices:

Gold

Tin

Silver

Lead

Questions 20 of 50

Question:If electron falls from \(n = 3\) to \(n = 2\), then emitted energy is

Answers Choices:

\(10.2eV\)

\(12.09eV\)

\(1.9eV\)

\(0.65eV\)

Questions 21 of 50

Question:The energy of a radiation of wavelength 8000Å is \({E_1}\)and energy of a radiation of wavelength 16000 \({\AA}\) is \({E_2}\). What is the relation between these two

Answers Choices:

\({E_1} = 6{E_2}\)

\({E_1} = 2{E_2}\)

\({E_1} = 4{E_2}\)

\({E_1} = 1/2{E_2}\)

\({E_1} = {E_2}\)

Questions 22 of 50

Question:The formation of energy bonds in solids are in accordance with

Answers Choices:

Heisenberg’s uncertainty principle

Bohr’s theory

Ohm’s law

Rutherford’s atomic model

Questions 23 of 50

Question:The radius of which of the following orbit is same as that of the first Bohr's orbit of hydrogen atom

Answers Choices:

\(H{e^ + }(n = 2)\)

\(L{i^{2 + }}(n = 2)\)

\(L{i^{2 + }}(n = 3)\)

\(B{e^{3 + }}(n = 2)\)

Questions 24 of 50

Question:The frequency of radiation emitted when the electron falls from \(n = 4\) to \(n = 1\) in a hydrogen atom will be (Given ionization energy of H\( = 2.18 \times {10^{ - 18}}J\,\,\,{\rm{ato}}{{\rm{m}}^{ - 1}}\)and \(h = 6.625 \times {10^{ - 34}}Js\))

Answers Choices:

\(3.08 \times {10^{15}}{s^{ - 1}}\)

\(2.00 \times {10^{15}}{s^{ - 1}}\)

\(1.54 \times {10^{15}}{s^{ - 1}}\)

\(1.03 \times {10^{15}}{s^{ - 1}}\)

Questions 25 of 50

Question:The de-Broglie wavelength of a particle with mass \(1gm\) and velocity \(100m/\sec \) is

Answers Choices:

\(6.63 \times {10^{ - 33}}m\)

\(6.63 \times {10^{ - 34}}m\)

\(6.63 \times {10^{ - 35}}m\)

\(6.65 \times {10^{ - 35}}m\)

Questions 26 of 50

Question:Minimum de-Broglie wavelength is associated with

Answers Choices:

Electron

Proton

\(C{O_2}\) molecule

\(S{O_2}\) molecule

Questions 27 of 50

Question:The position and velocity of a small particle like electron cannot be simultaneously determined.” This statement is

Answers Choices:

Heisenberg uncertainty principle

Principle of de Broglie's wave nature of electron

Pauli's exclusion principle

Aufbau's principle

Questions 28 of 50

Question:In Heisenberg's uncertainty equation \(\Delta x \times \Delta p \ge \frac{h}{{4\pi }}\); \(\Delta p\) stands for

Answers Choices:

Uncertainty in energy

Uncertainty in velocity

Uncertainty in momentum

Uncertainty in mass

Questions 29 of 50

Question:For an electron if the uncertainty in velocity is \(\Delta \nu \), the uncertainty in its position \((\Delta x)\) is given by

Answers Choices:

\(\frac{{hm}}{{4\pi \Delta \nu }}\)

\(\frac{{4\pi }}{{hm\Delta \nu }}\)

\(\frac{h}{{4\pi m\Delta \nu }}\)

\(\frac{{4\pi \;m}}{{h\;.\;\Delta \nu }}\)

Questions 30 of 50

Question:Orbital is

Answers Choices:

Circular path around the nucleus in which the electron revolves

Space around the nucleus where the probability of finding the electron is maximum

Amplitude of electrons wave

None of these

Questions 31 of 50

Question:The magnetic quantum number specifies

Answers Choices:

Size of orbitals

Shape of orbitals

Orientation of orbitals

Nuclear stability

Questions 32 of 50

Question:If \(n = 3\), then the value of \('l'\) which is incorrect

Answers Choices:

0

1

2

3

Questions 33 of 50

Question:The total number of orbitals in an energy level designated by principal quantum number \(n\) is equal to

Answers Choices:

\(2n\)

\(2{n^2}\)

\(n\)

\({n^2}\)

Questions 34 of 50

Question:In any atom which sub-shell will have the highest energy in the following

Answers Choices:

\(3p\)

\(3d\)

\(4s\)

\(3s\)

Questions 35 of 50

Question:The magnetic quantum number for valency electrons of sodium is

Answers Choices:

3

2

1

0

Questions 36 of 50

Question:Electronic configuration of \(C\) is

Answers Choices:

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

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

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

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

Questions 37 of 50

Question:Azimuthal quantum number for last electron of \(Na\) atom is

Answers Choices:

1

2

3

0

Questions 38 of 50

Question:Which statement is not correct for \(n = 5\), \(m = 3\)

Answers Choices:

\(l = 4\)

\(l = 0,\,1,\,3;\,s = + \frac{1}{2}\)

\(l = 3\)

All are correct

Questions 39 of 50

Question:Which of the following electronic configurations is not possible

Answers Choices:

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

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

\(3{d^{10}}4{s^2}4{p^2}\)

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

Questions 40 of 50

Question:The electronic configuration of an element is \(1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^5}4{s^1}\). This represents its

Answers Choices:

Excited state

Ground state

Cationic form

Anionic form

Questions 41 of 50

Question:Which of the following sets is possible for quantum numbers

Answers Choices:

\(n = 4,\,l = 3,\,m = - 2,\,s = 0\)

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

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

\(n = 4,\,l = 3,\,m = - 2,\,s = + \frac{1}{2}\)

Questions 42 of 50

Question:For principle quantum number \(n = 4\) the total number of orbitals having \(l = 3\)

Answers Choices:

3

7

5

9

Questions 43 of 50

Question:The number of electrons in the atom which has 20 protons in the nucleus

Answers Choices:

20

10

30

40

Questions 44 of 50

Question:The maximum number of electrons accommodated in \(5f\)orbitals are

Answers Choices:

5

10

14

18

Questions 45 of 50

Question:Which of the following metal ions will have maximum number of unpaired electrons

Answers Choices:

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

\(C{O^{ + 2}}\)

\(N{i^{ + 2}}\)

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

Questions 46 of 50

Question:Which of the metal ion will have highest number of unpaired electrons

Answers Choices:

\(C{u^ + }\)

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

\(F{e^{3 + }}\)

\(C{o^{2 + }}\)

Questions 47 of 50

Question:How many unpaired electrons are present in cobalt [Co] metal

Answers Choices:

2

3

4

7

Questions 48 of 50

Question:The number of unpaired electrons in nitrogen is

Answers Choices:

1

3

2

None of these

Questions 49 of 50

Question:The atomic orbitals are progressively filled in order of increasing energy. This principle is called as

Answers Choices:

Hund’s rule

Aufbau principle

Exclusion principle

de-Broglie rule

Questions 50 of 50

Question:The correct order of increasing energy of atomic orbitals is

Answers Choices:

\(5p < 4f < 6s < 5d\)

\(5p < 6s < 4f < 5d\)

\(4f < 5p < 5d < 6s\)

\(5p < 5d < 4f < 6s\)