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

When potassium metal is exposed to violet light

Question # 2

Charge to mass ratio (e/m) of the electron is determined by

Question # 3

Schrodinger wave equation describes electron completely because

Question # 4

A 4f orbital has

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

Pauli's principle is applicable to

Question # 9

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

Question # 10

Light emitted from a source has its wave length 500nm, then its wave number will be

Question # 11

When 6s orbital is complete then next electron goes to

Question # 12

Quantum number values for 2p orbitals are

Question # 13

An electron has principal quantum number 3. The number of its 1 subshell and 2 orbitals would be respectively

Question # 14

In the ground state of an atom the electron is present

Question # 15

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

Question # 16

The nature of positive ray depend on:

Question # 17

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

Question # 18

The value of charge on electron is

Question # 19

The energy of the first electron is helium will be

Question # 20

Which of the atoms has 1s2, 2s2, 2px22p1y2p1zconfiguration

Question # 21

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

Question # 22

Subsidiary quantum number specifies

Question # 23

The divisibility of atom was shown by

Question # 24

Azimuthal quantum number of last electron of 11Na is

Question # 25

Balmer's series is in ______ region

Question # 26

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

Question # 27

The size of electronic shell is described by

Question # 28

When 6d orbital is complete, the entering electron goes into:

Question # 29

1 erg of energy corresponds to

Question # 30

The principle quantum number describes

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
  • 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
  • C
    Computer mail 20 - May - 2026 04 Min 56 Sec 64/120
  • 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 When the electron jumps form third, fourth, fifth orbits to the second orbit, the transitions are known as
A. Paschen
B. Pfund
C. Balmer
D. Brackett
2 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
3 Schrodinger wave equation describes electron completely because
A. It describes a set of four quantum number
B. It describes the particle nature of electron
C. It measures wavelength of electron
D. It describes electron moving in specific orbit
4 In Millikan method the oil droplet falls under the force of gravity but it moves upward due to
A. Electric field
B. Magnetic field
C. Incident light
D. X-rays
5 Which have better penetrating power
A. Alpha rays
B. Beta rays
C. Gamma rays
D. X-rays
6 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.
7 Energy of electron in the infinite Bohr orbit of H-atom is
A. 0 KJ/mole
B. 1 KJ/mole
C. -1 KJ/mole
D. -1313.32 KJ/mole
8 Which of the following is not isoelectronic?
A. Na+
B. Mg2+
C. O2-
D. Cl-
9 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
10 The quantum number which describe the orientation of the orbitals is
A. Spin quantum number
B. Principle quantum number
C. Azimathal quantum number
D. Magnetic quantum number

Test Questions

Is this page helpful?

Share your comments & questions here

Guest

  • No comments yet. Be the first to comment!