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

  • Total Questions30

  • Time Allowed30

Start Test Download PDF

ECAT Chemistry Chapter 5 Atomic Structure

00:00
Question # 1

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

Question # 2

Heaviest particle is

Question # 3

The nature of the positive rays depend on

Question # 4

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

Question # 5

Charge to mass ratio of electron was discovered by:

Question # 6

When the 6d orbital is completed the entering electron goes into

Question # 7

The quantum number which describes the shape of the orbital is

Question # 8

Negatively charged particle nature of cathode rays was first demonstrated in 1895 by:

Question # 9

Sodium chloride imparts a yellow colour to the Bunsen flame. This can be interpreted due to the

Question # 10

Which of the following is not a sub-atomic particle

Question # 11

The wave number of the line emitted is 109.678 x 105m-1in the Lyman series when electron transition occurs

Question # 12

In the ground state of an atom the electron is present

Question # 13

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

Question # 14

The mass of the neutron is of the order of

Question # 15

The number of spherical nodes in 3p orbitals are

Question # 16

Pauli's principle is applicable to

Question # 17

The total number of orbitals in a shell with principal quantum number 'n' is

Question # 18

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

Question # 19

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

Question # 20

For principle quantum number n=4, the total number of orbitals having l = 3 is

Question # 21

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

Question # 22

For which of the following sets of quantum numbers and electron will have the highest energy?

Question # 23

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

Question # 24

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

Question # 25

The electron in an atom

Question # 26

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

Question # 27

A 4f orbital has

Question # 28

The nature of positive ray depend on:

Question # 29

The radius of first orbit of hydrogen atom

Question # 30

What is the packet of energy called?

Submit

Prepare Complete Set Wise ECAT Chemistry Chapter 5 Atomic Structure MCQs Online With Answers


Topic Test

00:00
Submit

Top Scorers Of ECAT Chemistry Chapter 5 Atomic Structure MCQ`s Test

  • M
    M Umer Arain 03 - Nov - 2024 00 Min 13 Sec 105/120
  • S
    Shazi Ansari 05 - Jun - 2024 01 Min 53 Sec 100/120
  • R
    rubina kousar 04 - Jun - 2024 09 Min 02 Sec 90/120
  • S
    Sarab Ali 01 - Jun - 2024 21 Min 54 Sec 90/120
  • R
    rehan sanaullah 06 - Jun - 2024 05 Min 02 Sec 80/120
  • A
    Abdullah Zubair 21 - Dec - 2024 07 Min 00 Sec 80/120
  • F
    Fatima Tabassum 15 - Jan - 2025 04 Min 08 Sec 75/120
  • M
    Madankalani Kalani 16 - Aug - 2024 19 Min 51 Sec 75/120
  • K
    Khalida Amjad 07 - Nov - 2024 13 Min 56 Sec 65/120
  • A
    affan mirza 03 - Jun - 2024 09 Min 39 Sec 60/120
  • M
    Muhammad Emmad 07 - Jun - 2024 14 Min 12 Sec 60/120
  • N
    Nayab Khan 17 - Aug - 2024 19 Min 35 Sec 60/120
  • M
    muhammad aftab 27 - Mar - 2026 24 Min 06 Sec 60/120
  • F
    Furqan Asif 06 - Mar - 2026 44 Min 40 Sec 56/120
  • A
    Abdul Rafay 17 - Oct - 2024 08 Min 05 Sec 55/120

ECAT Chemistry Chapter 5 Important MCQ's

Sr.# Question Answer
1 The charge over mass ratio of electron is:
A.

1.6 x 10-1 C Kg-1

B.

9.1 x 10-31 C Kg-1

C.

1.7588 x 1011 C Kg-1

D.

6.62 x 10-34 C Kg-1
2 In the ground state, an element has 13 electrons in its M shell. The element is
A. Copper
B. Chromium
C. Nickel
D. Iron
3 Sodium chloride imparts a yellow colour to the Bunsen flame. This can be interpreted due to the
A. low ionization energy of sodium
B. sublimation of metallic sodium to give yellow vapour
C. emission of excess energy absorbed as a radiation in the visible region as a radiation in the visible region
D. photosenitivity
4 The wave number of the line emitted is 109.678 x 105m-1in the Lyman series when electron transition occurs
5 When the 6d orbital is completed the entering electron goes into
A. 7f
B. 7 s
C. 7 p
D. 7 d
6 The total number of orbitals in a shell with principal quantum number 'n' is
A. 2n
B. 2n2
C. n2
D. n + 1
7 Positive particle in discharged tube is produced by ionization of gas molecules, which is caused by
A. Gas molecules collide with anode
B. Gas molecules are at high temperature
C. Gas molecules produce X-rays
D. Cathode rays remove electrons from gas molecules
8 The order of distance between the various Bohr orbits is
A. r2- r1> r3- r2> r4- r3> ......
B. r1> r2> r2- r3> r4-r3> .....
C. r2-r1= r3- r2= r4- r3> .....
D. r2- r1> r3- r2< r4- r3< ....
9 Negatively charged particle nature of cathode rays was first demonstrated in 1895 by:
A. Millikan.
B. J. Perrin.
C. Hittrof
D. J.J. Thomson.
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.

Test Questions

Is this page helpful?