Chemistry MCQs

Page No. 91

Pfund series are produced in the spectrum of hydrogen atom__________________?


awhen electrons jump down to 2nd- orbit

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bwhen electrons jump down to 3rd- orbit

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cwhen electrons jump down to 4th- orbit

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dwhen electrons jump down to 5th- orbit

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


a1

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b3

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c5

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d7

✓


View Answer 7

Rutherford bombarded _________________ particles in discovery of nucleus?


aGamma-rays

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bAlpha-rays

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cBeta-rays

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dX-rays

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View Answer Alpha-rays

Charge of electron was measured by__________________?


aJ.J Thomson

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bMillikan

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cRutherford

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dPerrin

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View Answer Millikan

Free neutron changes into proton with the emission of__________________?


aNeutron

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bElectron

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cBoth A and B

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dMeson

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View Answer Both A and B

Increase in atomic number is observed during_________________?


aAlpha emission

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bBeta emission

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cBoth A and B

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dRadioactivity

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View Answer Beta emission

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


a6

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b12

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c18

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d20

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View Answer 18

Atom cannot be divided into simple unitstheorized by________________?


aRutherford

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bDalton

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cBohr

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dSchrodinger

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View Answer Dalton

The velocity of the photon____________________?


aIs independent of wavelength

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bDepends upon source

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cDepends upon its frequency

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dEquals to the square of amplitude

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


ade-Broglie duel nature of matter

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bBohrs model

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cPlancks Quantum theory

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dRutherfords atomic model

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