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

Splitting of spectral lines of the hydrogen atom under the influence or magnetic field is called

Question # 2

What is the packet of energy called?

Question # 3

In Bohr model of hydrogen atom the distance between adjacent orbits increases away from the nucleus, the energy difference between the orbits

Question # 4

E = hv is the

Question # 5

In Millikan method the oil droplet falls under the force of gravity but it moves upward due to

Question # 6

The degenerate orbitals p-sub shell are

Question # 7

Electrons arranged in orbitals according to the increasing order of their n + l values, this rule is named as

Question # 8

Proton was discovered by:

Question # 9

The limiting line of Blamer series in hydrogen spectrum lies in

Question # 10

n + l value for 4f will

Question # 11

Heaviest particle is

Question # 12

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

Question # 13

The principle quantum number describes

Question # 14

In the ground state of an atom, the electron is present:

Question # 15

e/m of cathode rays is same but for positive rays e/m changes by changing gas in the discharge tube because

Question # 16

The energy of the first electron is helium will be

Question # 17

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

Question # 18

Which one of the following particles has amass 1/1836 time, that of hydrogen?

Question # 19

Which have better penetrating power

Question # 20

Positive particle in discharged tube is produced by ionization of gas molecules, which is caused by

Question # 21

Energy of electron in an orbit according to Bohr theory is negative due to

Question # 22

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 # 23

Orbital having same energy is called:

Question # 24

Azimuthal quantum number of last electron of 11Na is

Question # 25

Smallest charge of electricity that has been measured so far is

Question # 26

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

Question # 27

Pauli's principle is applicable to

Question # 28

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

Question # 29

The order of frequency of the following radiations unltraviolet, visible, infrared and microwave is

Question # 30

Number of neutrons in heavy hydrogen atom is

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ECAT Chemistry Chapter 5 Important MCQ's

Sr.# Question Answer
1 Rutherford's atomic model suggests the existence of
A. Atom
B. Nucleus
C. alpha particle
D. Measons
2 The spectrum of helium is expected to be similar to that of
A. H
B. Li+
C. Na
D. He+
3 The spectrum of He is expected to be similar to that of
A. H
B. Na
C. He+
D. Li+
4 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
5 Anode is the surface on which probability of finding electron is:
A. 50%
B. Less than 10%.
C. More than 95%.
D. Zero.
6 In the ground state, an element has 13 electrons in its M shell. The element is
A. Copper
B. Chromium
C. Nickel
D. Iron
7 An electron with n = 3 , l = 2 will be in the sub-shell
A. 3p
B. 3d
C. 3f
D. 3s
8 An electron has principal quantum number 3. The number of its 1 subshell and 2 orbitals would be respectively
A. 3 and 5
B. 3 and 7
C. 3 and 9
D. 2 and 5
9 Splitting of spectral lines of the hydrogen atom under the influence or magnetic field is called
A. Stark effect
B. Zeeman effect
C. Compton effect
D. Photoelectric effect
10 The energy of ionization of an atom is the energy difference between orbital

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