Chemistry MCQs

Page No. 91

Pfund series are produced in the spectrum of hydrogen atom__________________?


awhen electrons jump down to 2nd- orbit


bwhen electrons jump down to 3rd- orbit


cwhen electrons jump down to 4th- orbit


dwhen electrons jump down to 5th- orbit



The maximum number of orbitals present in a subshell that is represented by Azimuthal quantum number = 3 will be________________?


a1


b3


c5


d7


View Answer 7

Rutherford bombarded _________________ particles in discovery of nucleus?


aGamma-rays


bAlpha-rays


cBeta-rays


dX-rays


View Answer Alpha-rays

Charge of electron was measured by__________________?


aJ.J Thomson


bMillikan


cRutherford


dPerrin


View Answer Millikan

Free neutron changes into proton with the emission of__________________?


aNeutron


bElectron


cBoth A and B


dMeson


View Answer Both A and B

Increase in atomic number is observed during_________________?


aAlpha emission


bBeta emission


cBoth A and B


dRadioactivity


View Answer Beta emission

The number of fundamental particles in an atom of the lightest isotope carbon are_______________?


a6


b12


c18


d20


View Answer 18

Atom cannot be divided into simple unitstheorized by________________?


aRutherford


bDalton


cBohr


dSchrodinger


View Answer Dalton

The velocity of the photon____________________?


aIs independent of wavelength


bDepends upon source


cDepends upon its frequency


dEquals to the square of amplitude



The relationship between energy of a photon of light and its frequency is given by________________?


ade-Broglie duel nature of matter


bBohrs model


cPlancks Quantum theory


dRutherfords atomic model



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