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

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

Question # 2

The total number of orbitals possible for the quantum number n is

Question # 3

Quantum number values for 2p orbitals are

Question # 4

The velocity of photon is:

Question # 5

Energy of electron in the infinite Bohr orbit of H-atom is

Question # 6

Neutron was discovered by:

Question # 7

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

Question # 8

Schrodinger wave equation describes electron completely because

Question # 9

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

Question # 10

In Millikan method for determination of charge on electron the air in the chamber is ionized by

Question # 11

Which quantum number is sufficient to describe the electron is hydrogen atom?

Question # 12

Pauli's principle is applicable to

Question # 13

The valence orbital configuration of an element with atomic number 23 is

Question # 14

Orbital having same energy is called:

Question # 15

Alpha rays consist of:

Question # 16

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

Question # 17

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

Question # 18

When electrons revolve in stationary orbits

Question # 19

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

Question # 20

Charge on electron was discovered by:

Question # 21

The radiations with wavelength shorter than violet light are called

Question # 22

Proton was discovered by:

Question # 23

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

Question # 24

If the value of principal quantum number is 3. the total possible values for magnetic quantum number will be

Question # 25

The divisibility of atom was shown by

Question # 26

Find the magnetic moment of a divalent ion in aqueous solution if its atomic number is 25

Question # 27

n + l value for 4f will

Question # 28

An electron with n = 3 , l = 2 will be in the sub-shell

Question # 29

A 4f orbital has

Question # 30

The credit of discovering neutron goes to

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ECAT Chemistry Chapter 5 Important MCQ's

Sr.# Question Answer
1 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
2 The electronic configuration of an atom/ion can be defined by the following
A. Aufbau principle
B. Pauli's exclusion principle
C. Hund's Rule
D. All the above
3 When the electron jumps form second third, fourth orbit to the fist orbit, the transitions are known as
A. Balmer series
B. Lyman series
C. Pfund series
D. Brackett series
4 Which have better penetrating power
A. Alpha rays
B. Beta rays
C. Gamma rays
D. X-rays
5 Orbital having same energy is called:
A. Hybrid orbital.
B. Valence orbital.
C. Degenerate orbital.
D. D-orbital.
6 The orbital in Rutherford's model is
A. Spiral
B. Circular
C. Both
D. None
7 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.
8 Which of the atoms has 1s2, 2s2, 2px22p1y2p1zconfiguration
A. Nitrogen
B. Carbon
C. Fluorine
D. Oxygen
9 When an electric current is passed through discharge tube at low pressure, cathode rays are emitted from cathode these rays consist of:
A. Alpha rays.
B. Negative particles.
C. Electromagnetic rays.
D. Positive particles.
10 In the ground state of an atom the electron is present
A. In the nucleus
B. In the second shell
C. Nearest to the nucleus
D. Farthest from the nucleus

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