Chemistry MCQs

Page No. 93

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


aOrbital


bOrbit is elliptical


cSubshell


dElectron cloud


View Answer Orbital

Atom with higher atomic number produces X-rays of__________________?


aShorter wavelength


bLarger wavelength


cX-ray not produced


dAll are possible


View Answer Shorter wavelength

When electrons collide with heavy metals than ___________ are produced?


aBeta-rays


bAlpha-rays


cX-rays


dGamma-rays


View Answer X-rays

Atomic orbits having same energy are called________________?


aDegenerate orbitals


bBonding molecular orbitals


cAnti bonding molecular orbitals


dHalf filled orbitals


View Answer Degenerate orbitals

The correct electronic configuration of Cu is ___________________?


a[Ar]4s1


b[Ar]4s2


c[Ar]3d104s1


d[Ar]3d94s2


View Answer [Ar]3d104s1

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


a2-times


b3-times


c4-times


d6-times


View Answer 4-times

Planks theory says energy is emitted__________________?


aIn continuous manner


bDiscontinuous manner


cSimultaneously


dIn the form of heat


View Answer Discontinuous manner

The value of e/m ratio of electron is________________?


a6.02 x 1023 C/kg


b1.7588 x 1020 C/kg


c9.1095 x 10-31 C/kg


d1.7588 x 1011 C/kg


View Answer 1.7588 x 1011 C/kg

Positive rays give flash on________________?


aAgNO3 plate


bAgCl plate


cZnO


dZnS


View Answer ZnS

Angle of deflection was studied by________________?


aHitorff


bStoney


cWilliam Crookes


dJ.Perrin


View Answer J.Perrin

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