EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 2 - Structure of Atom>JEE Main - 8th April 2019 Shift 2>Q 18

MEDIUM

JEE Main

IMPORTANT

Earn 100

If $p$ is the momentum of the fastest electron ejected from a metal surface after the irradiation of light having wavelength $λ,$ then for $1.5 p$ momentum of the photoelectron, the wavelength of the light should be:

(Assume kinetic energy of ejected photoelectron to be very high in comparison to work function)

42.86% studentsanswered this correctly

Important Questions on Structure of Atom

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 2 - Structure of Atom>JEE Main - 8th April 2019 Shift 1>Q 19

The quantum number of four electrons are given below:

I . n = 4, l = 2, m_{l} = - 2, m_{s} = - 1 / 2

I I . n = 3, l = 2, m_{l} = 1, m_{s} = + 1 / 2

I I I . n = 4, l = 1, m_{l} = 0, m_{s} = + 1 / 2

I V . n = 3, l = 1, m_{l} = 1, m_{s} = - 1 / 2

The correct order of their increasing energies will be:

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 2 - Structure of Atom>JEE Main - 8th April 2017>Q 20

If the shortest wavelength in Lyman series of hydrogen atom is

A

, then the longest wavelength in Paschen series of

{He}^{+}

is

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 2 - Structure of Atom>JEE Main - 7th January 2020 Shift 1>Q 21

The number of orbitals associated with quantum numbers

n = 5, m_{s} = + \frac{1}{2}

is:

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 2 - Structure of Atom>JEE Main - 7th April 2013>Q 22

Energy of an electron is given by

E = - 2.178 \times 1 0^{- 18} (\frac{Z^{2}}{n^{2}}) J

. Wavelength of light required to excite an electron in a hydrogen atom from level n=1 to n=2 will be :

(h = 6.62 \times 10^{- 34} J s a n d c = 3.0 \times 10^{8} m s^{- 1})

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 2 - Structure of Atom>JEE Main - 6th April 2014>Q 23

The correct set of four quantum numbers for the valence electrons of rubidium atom

(Z = 37)

is

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 2 - Structure of Atom>JEE Main - 5 September 2020 Shift 2>Q 24

The correct statement about probability density (except at infinite distance from nucleus) is :

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 2 - Structure of Atom>JEE Main - 5 September 2020 Shift 1>Q 25

The difference between the radii of $3^{rd}$ and $4^{th}$ orbits of ${Li}_{}^{2 +}$ is ${ΔR}_{1}$ . The difference between the radii of $3^{rd}$ and $4^{th}$ orbits of ${He}^{+}$ is $Δ R_{2} .$ Ratio of $Δ R_{1} : Δ R_{2}$ is :

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 2 - Structure of Atom>JEE Main - 4th April 2015>Q 26

Which of the following is the energy of a possible excited state of hydrogen?