On account of the disruption in education due to the corona pandemic, we're opening up our platform for teachers, free of cost. Know More →

JEE Advanced > Structure of Atom

Explore popular questions from Structure of Atom for JEE Advanced. This collection covers Structure of Atom previous year JEE Advanced questions hand picked by experienced teachers.

Q 1.

Correct4

Incorrect-1

Rutherford's experiment on scattering of {tex} { \alpha } {/tex} -particles showed for the first time that the atom has

A

electrons

B

protons

nucleus

D

neutrons

Explanation

Q 2.

Correct4

Incorrect-1

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

A

the number of electrons undergoing the transition

B

the nuclear charge of the atom

the difference in the energy of the energy levels involved in the transition

D

the velocity of the electron undergoing the transition.

Explanation

Q 3.

Correct4

Incorrect-1

The orbital diagram in which the Aufbau principle is violated is:

A

C

D

Explanation

Q 4.

Correct4

Incorrect-1

The correct ground state electronic configuration of chromium atom is:

{tex} [ \mathrm { Ar } ] 3 d ^ { 5 } 4 s ^ { 1 } {/tex}

B

{tex} [ \text { Ar } ] 3 d ^ { 4 } 4 s ^ { 2 } {/tex}

C

{tex} [\text {Ar} ] 3 d ^ { 6 } 4 s ^ { 0 } {/tex}

D

{tex} [ \text {Ar} ] 4 d ^ { 5 } 4 s ^ { 1 } {/tex}

Explanation

Q 5.

Correct4

Incorrect-1

The correct set of quantum numbers for the unpaired electron of chlorine atom is:

A

{tex} n : 2,\ l : 1,\ m : 0{/tex}

B

{tex} n : 2, \ l : 1, \ m : 1 {/tex}

{tex} n : 3 , \ l : 1 , \ m : 1 {/tex}

D

{tex} n : 3 , \ l : 0 , \ m : 0 {/tex}

Explanation

Q 6.

Correct4

Incorrect-1

Which of the following does not characterise {tex} X {/tex}-rays?

A

The radiation can ionise gases

B

It causes ZnS to fluorescence

Deflected by electric and magnetic fields

D

Have wavelengths shorter than ultraviolet rays

Explanation

Q 7.

Correct4

Incorrect-1

A {tex} 3 p {/tex} orbital has:

A

two non spherical nodes

B

two spherical nodes

one spherical & one non spherical node

D

one spherical and two non spherical nodes

Explanation

Q 8.

Correct4

Incorrect-1

The orbital angular momentum of an electron in 2s orbital is:

A

{tex} + \frac { 1 } { 2 } \cdot \frac { h } { 2 \pi } {/tex}

{tex}\mathrm {Zero}{/tex}

C

{tex} \frac { h } { 2 \pi } {/tex}

D

{tex} \sqrt { 2 } \cdot \frac { h } { 2 \pi } {/tex}

Explanation

Q 9.

Correct4

Incorrect-1

For a {tex} d {/tex}-electron, the orbital angular momentum is

{tex} \sqrt { 6 } ( h / 2 \pi ) {/tex}

B

{tex} \sqrt { 2 } ( h / 2 \pi ) {/tex}

C

{tex} ( h / 2 \pi ) {/tex}

D

{tex} 2 ( h / 2 \pi ) {/tex}

Explanation

Q 10.

Correct4

Incorrect-1

The electrons, identified by quantum numbers {tex} n {/tex} and {tex} l , {/tex} (i) {tex} n = 4 , l = 1 , ( \text { ii } ) n = 4 , l = 0 , ( \text { iii) } n = 3 , l = 2 , \text { and (iv) } n = 3, {/tex} {tex} l = 1 {/tex} can be placed in order of increasing energy, from the lowest to highest, as

{tex} ( \mathrm { iv } ) < ( \mathrm { ii } ) < ( \mathrm { iii } ) < ( \mathrm { i } ) {/tex}

B

{tex}(\mathrm { ii }) < ( \mathrm { iv } ) < ( \mathrm { i } ) < ( \mathrm { iii } ) {/tex}

C

{tex} ( \text {i} ) < ( \text { iii } ) < ( \text {ii} ) < ( \text {iv} ) {/tex}

D

{tex} ( \text { iii) } < ( \text {i} ) < ( \text {iv} ) < ( \text {ii} ) {/tex}

Explanation

Q 11.

Correct4

Incorrect-1

The number of nodal planes in a {tex} p _ { x } {/tex} orbital is

one

B

two

C

three

D

Zero

Explanation

Q 12.

Correct4

Incorrect-1

The wavelength associated with a golf ball weighing {tex} 200\ \mathrm { g } {/tex} and moving at a speed of {tex} 5\ \mathrm { m } / \mathrm { h } {/tex} is of the order

{tex} 10 ^ { - 10 } \mathrm { m } {/tex}

B

{tex} 10 ^ { - 20 } \mathrm { m } {/tex}

C

{tex} 10 ^ { - 30 } \mathrm { m } {/tex}

D

{tex} 10 ^ { - 40 } \mathrm { m } {/tex}

Explanation

Q 13.

Correct4

Incorrect-1

The quantum numbers {tex} + 1 / 2 {/tex} and {tex} - 1 / 2 {/tex} for the electron spin represent

A

rotation of the electron in clockwise and anticlockwise direction respectively

B

rotation of the electron in anticlockwise and clockwise direction respectively

C

magnetic moment of the electron pointing up and down respectively

two quantum mechanical spin states which have no classical analogue

Explanation

Q 14.

Correct4

Incorrect-1

Rurtherford's experiment, which established the nuclear model of the atom, used a beam of

A

{tex}\beta{/tex}-particles, which impinged on a metal foil and got absorbed

B

{tex}\gamma{/tex}-rays, which impinged on a metal foil and ejected electrons

C

helium atoms, which impinged on a metal foil and got scattered

helium nuclei, which impinged on a metal foil and got scattered

Explanation

Q 15.

Correct4

Incorrect-1

If the nitrogen atom has electronic configuration {tex} 1 s ^ { 7 } , {/tex} it would have energy lower than that of the normal ground state configuration {tex} 1 s ^ { 2 } 2 s ^ { 2 } 2 p ^ { 3 } , {/tex} because the electrons would be closer to the nucleus. Yet {tex} 1 s ^ { 7 } {/tex} is not observed because it violates.

A

Heisenberg uncertainty principle

B

Hund's rule

Pauli exclusion principle

D

Bohr postulate of stationary orbits

Explanation