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

No cathode rays are produced in the discharged tube when gas is under ordinary pressure even if voltage of 5000 to 10000 is applies. This reason is

Question # 3

The mass of the neutron is of the order of

Question # 4

Orbital having same energy is called:

Question # 5

The size of electronic shell is described by

Question # 6

Which of the following element's outermost orbits last electron has magnetic quantum number m=0?

Question # 7

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

Question # 8

When electrons revolve in stationary orbits

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

Which of the following orbitals have a dumb bell shape?

Question # 13

Their e/m, ratio resembles with that of electrons

Question # 14

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 # 15

The energy of the first electron is helium will be

Question # 16

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

Question # 17

Which one of the following statements is true about discovery of neutrons?

Question # 18

Energy of electron in first orbit of H atom is

Question # 19

E = hv is the

Question # 20

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

Question # 21

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

Question # 22

The limiting line of Blamer series in hydrogen spectrum lies in

Question # 23

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

Question # 24

Balmer's series is in ______ region

Question # 25

For a 3P subshell the set of principle and azimuthal quantum number is

Question # 26

Smallest charge of electricity that has been measured so far is

Question # 27

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

Question # 28

In the ground state, an element has 13 electrons in its M shell. The element is

Question # 29

Heaviest particle is

Question # 30

Rutherford's atomic model suggests the existence of

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 energy of the first electron is helium will be
A. -13.6 eV
B. -54.4 eV
C. -5.44 eV
D. zero
2 In Bohr model of hydrogen atom the distance between adjacent orbits increases away from the nucleus, the energy difference between the orbits
A. Increases
B. Decreases
C. Reaming same
D. Orbits coincide
3 Which of the following was discovered first:
A. Charge to mass ratio of electrons.
B. Mass of electrons.
C. Charge of electrons.
D. All of above at same time.
4 When potassium metal is exposed to violet light
A. Ejection of electrons takes place
B. Ejection of some potassium atoms occurs
C. There is no effect
D. The absorption of electrons takes place
5 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.
6 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
7 When electrons revolve in stationary orbits
A. There is no change in energy level
B. They vecome stationary
C. They are gaining kinetic energy
D. There is increase in energy
8 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
A. Orientation of orbital in space
B. Fact that two electrons in the same orbital should have opposite spins
C. Energy of the orbital
D. Spin of the electron
9 Rutherford's model of atom failed because:
A. The atom did o have a nucleus and electrons
B. It did not account fro the attraction b/w protons and neutrons
C. It did no account for the stability of the atom.
D. There is actually no space b/w the nucleus ad the electrons.
10 Splitting of spectral lines when atoms are subjected to strong electric field is called:
A. Zeeman effect.
B. Stark effect
C. Photoelectric effect.
D. Compton effect.

Test Questions

Is this page helpful?