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

Their e/m, ratio resembles with that of electrons

Question # 2

Which have better penetrating power

Question # 3

Number of neutrons in heavy hydrogen atom is

Question # 4

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

Question # 5

The radius of first orbit of H-atom is

Question # 6

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

Question # 7

Rutherford's atomic model suggests the existence of

Question # 8

What is the packet of energy called?

Question # 9

Charge on electron was discovered by:

Question # 10

The electron in an atom

Question # 11

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

Question # 12

The nature of positive ray depend on:

Question # 13

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

Question # 14

An orbital can accommodate maximum two electrons with opposite spins according to

Question # 15

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

Question # 16

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

Question # 17

The symbol of the element whose atoms have the outer most electronic configuration 2s22p3is

Question # 18

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

Question # 19

When an electric current is passed through discharge tube at low pressure, cathode rays are emitted from cathode these rays consist of:

Question # 20

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

Question # 21

Quantum number value for 2p orbitals are:

Question # 22

The quantum number which describe the orientation of the orbitals is

Question # 23

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

Question # 24

The nature of positive rays depend on:

Question # 25

The number of spherical nodes in 3p orbitals are

Question # 26

Heaviest particle is

Question # 27

Energy of electron in first orbit of H atom is

Question # 28

Proton was discovered by:

Question # 29

The range of visible spectrum is

Question # 30

Which of the following is not charged particle

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
  • A
    Abdullah Nadeem 01 - Jun - 2024 04 Min 12 Sec 80/120
  • 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
  • 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 With the reference of w/m ratio of anode rays, the e/m ratio of cathode rays s:
A. Greater.
B. same.
C. Smaller.
D. Not fixed.
2 The total number of orbitals in a shell with principal quantum number 'n' is
A. 2n
B. 2n2
C. n2
D. n + 1
3 Cathode rays emitted from cathode are
A. Canal rays
B. Protons
C. Electrons
D. Positrons
4 Pauli's principle is applicable to
A. Degenerate orbits
B. Two electrons in the same orbital
C. One electron
D. None
5 The electron in an atom
A. moves randomly around the nucleus
B. has fixed space around the nucleus
C. is stationary in various energy levels
D. moves around its nucleus in definite energy levels
6 The number of electrons in the M shell of the element with atomic number 24 is
A. 24
B. 12
C. 13
D. 8
7 An orbital can accommodate maximum two electrons with opposite spins according to
A. Heisenberg's principle
B. Aufbau principle
C. Hund's srule
D. Pauli exclusion principle
8 The total number of orbitals possible for the quantum number n is
A. n
B. n2
C. 2n
D. 2n2
9 Azimuthal quantum number of last electron of 11Na is
A. 1
B. 2
C. 3
D. 0
10 For principle quantum number n=4, the total number of orbitals having l = 3 is
A. 3
B. 7
C. 5
D. 9

Test Questions

Is this page helpful?