Chemistry MCQs

Page No. 93

Space around nucleus where finding probability of electrons is maximum is called ____________________?


aOrbital

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bOrbit is elliptical

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cSubshell

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dElectron cloud

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View Answer Orbital

Atom with higher atomic number produces X-rays of__________________?


aShorter wavelength

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bLarger wavelength

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cX-ray not produced

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dAll are possible

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View Answer Shorter wavelength

When electrons collide with heavy metals than ___________ are produced?


aBeta-rays

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bAlpha-rays

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cX-rays

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dGamma-rays

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View Answer X-rays

Atomic orbits having same energy are called________________?


aDegenerate orbitals

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bBonding molecular orbitals

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cAnti bonding molecular orbitals

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dHalf filled orbitals

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View Answer Degenerate orbitals

The correct electronic configuration of Cu is ___________________?


a[Ar]4s1

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b[Ar]4s2

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c[Ar]3d104s1

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d[Ar]3d94s2

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View Answer [Ar]3d104s1

2nd orbit is ___________ away from nucleus of H-atom as compared to 1st orbit is ?


a2-times

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b3-times

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c4-times

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d6-times

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View Answer 4-times

Planks theory says energy is emitted__________________?


aIn continuous manner

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bDiscontinuous manner

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cSimultaneously

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dIn the form of heat

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View Answer Discontinuous manner

The value of e/m ratio of electron is________________?


a6.02 x 1023 C/kg

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b1.7588 x 1020 C/kg

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c9.1095 x 10-31 C/kg

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d1.7588 x 1011 C/kg

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View Answer 1.7588 x 1011 C/kg

Positive rays give flash on________________?


aAgNO3 plate

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bAgCl plate

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cZnO

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dZnS

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View Answer ZnS

Angle of deflection was studied by________________?


aHitorff

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bStoney

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cWilliam Crookes

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dJ.Perrin

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View Answer J.Perrin

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