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

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Question # 1

The uncertainty principle was stated only

Question # 2

Consider the ground state of Cr atom (Z=24). The numbers of electrons with the azimuthal quantum numbers l = 1 and l = 2 are respectively

Question # 3

The nature of positive rays depend on:

Question # 4

Which is not true with respect to cathode rays?

Question # 5

The de-Brogile wavelength of a particle with mass 1g and velocity 100 m/s is

Question # 6

n + l value for 4f will

Question # 7

Which of the following is not a property of cathode rays

Question # 8

1 erg of energy corresponds to

Question # 9

The total values of magnetic quantum number of subshell are five, the subshell is

Question # 10

Smallest charge of electricity that has been measured so far is

Question # 11

Their e/m, ratio resembles with that of electrons

Question # 12

The quantum number which describe the orientation of the orbitals is

Question # 13

The velocity of photon is:

Question # 14

A 4f orbital has

Question # 15

Which of the following was discovered first:

Question # 16

The nature of the positive rays depend on

Question # 17

The atomic number of an element is 35 what is the total number of electrons present in all the p-orbitals of the ground state atom of that element?

Question # 18

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

Question # 19

The wave number of light emitted by a certain source is 2 x 105m. The wavelength of this light will be:

Question # 20

The quantum number which determines the shape of the orbital is

Question # 21

With the reference of w/m ratio of anode rays, the e/m ratio of cathode rays s:

Question # 22

In the ground state of an atom the electron is present

Question # 23

The credit of discovering neutron goes to

Question # 24

The rules which describe the distribution of electron in atomic energy levels are Auf-ban principle, Pauli's exclusion principle. Hunds rule. The pauli exclusion principle refers to the

Question # 25

Cathode rays drive a small paddle wheel placed in their path. This observation shows that

Question # 26

The electron in an atom

Question # 27

The number of neutrons in the element 94Be is

Question # 28

The mass of the neutron is of the order of

Question # 29

Photons of yellow colour are ______ energetic than violet colour

Question # 30

The ratio of the ionization energy of H and Be3+is

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ECAT Chemistry Chapter 5 Important MCQ's

Sr.# Question Answer
1
Question Image
A. Plank's equations
B. de Broglie's equations
C. Heisenburg's equation
D. None
2 The ratio of the ionization energy of H and Be3+is
A. 1 : 1
B. 1 : 3
C. 1 : 9
D. 1 : 16
3 The nature of positive rays depend on:
A. Nature of discharge tube.
B. Nature of resident gas.
C. Nature of electrode.
D. All of above.
4 For which of the following sets of quantum numbers and electron will have the highest energy?
A. 3,2,1,1/2
B. 4,2,-1,1/2
C. 4,1,0,-1/2
D. 5,0,0,1/2
5 The range of visible spectrum is
A. 300 - 600 nm
B. 600 - 900 nm
C. 400 - 750 nm
D. 100 - 300 nm
6 When the 6d orbital is completed the entering electron goes into
A. 7f
B. 7 s
C. 7 p
D. 7 d
7 Which quantum number is sufficient to describe the electron is hydrogen atom?
A. l
B. n
C. m
D. s
8 In Millikan method for determination of charge on electron the air in the chamber is ionized by
A. Protons
B. Electric field
C. X-rays
D. a - particles
9 The number of spherical nodes in 3p orbitals are
A. One
B. Three
C. Non
D. Two
10 The de-Brogile wavelength of a particle with mass 1g and velocity 100 m/s is
A. 6.63 x 10-33m
B. 6.63 x 10-34m
C. 6.63 x 10-35m
D. 6.65 x 10-35m

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