ECAT Pre Engineering Chemistry Chapter 5 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 5 Atomic Structure

Try The MCQ's Test For ECAT Chemistry Chapter 5 Atomic Structure

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ECAT Chemistry Chapter 5 Atomic Structure

00:00
Question # 1

Splitting of spectral lines when atoms are subjected to strong electric field is called:

Question # 2

Which have better penetrating power

Question # 3

Quantum number value for 2p orbitals are:

Question # 4

What is the packet of energy called?

Question # 5

Charge on electron was discovered by:

Question # 6

n + l value for 4f will

Question # 7

Which of the following has more unpaired d-electrons?

Question # 8

Rutherford's planetary like picture of the atomic modal was defective because

Question # 9

Anode is the surface on which probability of finding electron is:

Question # 10

The spectrum of helium is expected to be similar to that of

Question # 11

The wave number of the light emitted by a certain source is 2 x 106m-1. The wavelength of this light will be

Question # 12

The correct set of quantum numbers (n,l and m) respectively of the unpaired electron of chlorine atom is

Question # 13

Their e/m, ratio resembles with that of electrons

Question # 14

When the electron jumps form second third, fourth orbit to the fist orbit, the transitions are known as

Question # 15

The orbitals having n + l = 5 are

Question # 16

The limiting line of Blamer series in hydrogen spectrum lies in

Question # 17

The electronic configuration of an atom/ion can be defined by the following

Question # 18

E = hv is the

Question # 19

The wave length of electron as wave is 0.5 nm. What is the wave length in meter

Question # 20

The total number of possible values of magnetic quantum number for the value of l=3 is

Question # 21

Alpha rays consist of:

Question # 22

The number of spherical nodes in 3p orbitals are

Question # 23

Charge to mass ratio (e/m) of the electron is determined by

Question # 24

Which of the following was discovered first:

Question # 25

The quantum number which describe the orientation of the orbitals is

Question # 26

Which of the following particles has longest wavelength, if they have same speed:

Question # 27

Mass of simple electron is:

Question # 28

The value of charge on electron is

Question # 29

The value of R (Rydberg's constant) is _______ m-1

Question # 30

Electrons in degenerate orbitals are placed in separate orbitals with same spin according to

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ECAT Chemistry Chapter 5 Important MCQ's

Sr.# Question Answer
1 When 3p orbital is complete, the entering electron goes into
A. 4s
B. 3d
C. 4p
D. 4f
2 The divisibility of atom was shown by
A. Stoney
B. J.J. Thomson
C. Millikan
D. Rutherford
3 The nature of positive ray depend on:
A. The nature of electrode.
B. The nature of discharge tube.
C. The nature of residual gas.
D. All of above.
4 The wave length of electron as wave is 0.5 nm. What is the wave length in meter
A. 5 x 10-9
B. 5 x 10-12
C. 5 x 10-6
D. 5 x 10-10
5 The wave number of the light emitted by a certain source is 2 x 106m-1. The wavelength of this light will be
A. 500 nm
B. 500 m
C. 200 nm
D. 5 x 107m
6 Heaviest particle is
A. Meson
B. Neutron
C. Proton
D. Electron
7 The total values of magnetic quantum number of subshell are five, the subshell is
A. S-subshell
B. P-subshell
C. D-subshell
D. F-subshell
8 Schrodinger wave equation describes electron completely because
A. It describes a set of four quantum number
B. It describes the particle nature of electron
C. It measures wavelength of electron
D. It describes electron moving in specific orbit
9 The four quantum numbers of the valency electron of potassium are
A. 4,1,1,1/2
B. 4,0,0,1/2
C. 4,1,0,1/2
D. 4,4,0,1/2
10 When potassium metal is exposed to violet light
A. Ejection of electrons takes place
B. Ejection of some potassium atoms occurs
C. There is no effect
D. The absorption of electrons takes place

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