Revision Quiz | Atomic Structure for JEE & BITSAT Exams

Question 1

How many spectral lines are emitted by atomic hydrogen excited to n^th energy level?

Question 2

Ejection of the photoelectron from metal in the photoelectric effect experiment can be stopped by applying 0.5 V when the radiation of 250 nm is used. The work function of the metal is :

Question 3

The velocity of an electron in nth orbit of hydrogen atom bears the ratio 1:411 to velocity of light. The number of coloured lines formed when electron jumps from (n+3) state to ground state is

Question 4

The ratio between time periods taken by electron in Bohr’s 1^st and 2^nd orbits for each revolution is:

Question 5

what was the source of α particles used by Rutherford in his αparticle scattering experiment ?

Question 6

Charge to mass ratio of cathode rays depends on

Question 7

The speed of a proton is one-hundredth of the speed of light in vacuum. What is its de-Broglie wavelength? Assume that one mole of protons has a mass equal to one gram [h = 6.626 × 10^–34 Js]

Question 8

Statement I: Radiations of frequency 1015 Hz are incident on two photosensitive surfaces A and B. A no photoelectric emission takes place.
Statement II: Energy of incident photon is less than the work function

Question 9

The graph that depicts Einstein’s photoelectric effect for a monochromatic soure of frequency above the three fold frequency is

Question 10

Give the correct order of initials T (true) or F (false) for following statements.
(I) If an ion has 2 electrons in K shell, 8 electrons in L shell and 6 electrons in M shell, then number of S electrons present in that element is 6.
(II) The maximum number of electrons in a subshell is given by 2n².
(III) If electron has magnetic number –1, then it cannot be present in s-orbital.
(IV) Only one radial node is present in 3p orbital.

Question 11

For an orbital in B⁺⁴ radial function is

The radial node is at distance from nucleus.

Question 12

Nitrogen has electronic configuration 1s² 2s² 2p_x¹ 2p_y¹ 2p_z¹ and not 1s² 2s² 2p_x² 2p_y¹ 2p_z⁰ which is determined by:

Question 13

Which one of the following sets of quantum numbers represents the highest energy level in an atom?

Question 14

The value of (n₂ – n₁ ) and (n₂² – n₁² ) for N⁶⁺ ion in atomic spectrum are 6 and 48 respectively. The wavelength of emitted photon when electron jump from n₂ to n₁ is : (n₂ = Higher energy level, n₁ = Lower energy level)

Question 15

Which series lie in infrared region of electromagnetic spectrum?