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

Cathode rays drive a small paddle wheel placed in their path. This observation shows that

Question # 2

The value of R (Rydberg's constant) is _______ m-1

Question # 3

The energy of ionization of an atom is the energy difference between orbital

Question # 4

Which of the following is not isoelectronic?

Question # 5

Balmer's series is in ______ region

Question # 6

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

Question # 7

If the radius of first Bohr orbit be ao, then the radius of third Bohr orbit would be

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

The number of neutrons in the element 94Be is

Question # 13

Orbitals having same energy are called

Question # 14

Proton was discovered by:

Question # 15

The e.m value for positive rays maximum for:

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

Maximum potential energy that an electron can have within the atom is:

Question # 20

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

Question # 21

The quantum number which describe the orientation of the orbitals is

Question # 22

When cathode rays strike the anode metal X-rays are emitted and not the positive rays because

Question # 23

Charge on electron was discovered by:

Question # 24

Smallest charge of electricity that has been measured so far is

Question # 25

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

Question # 26

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

Question # 27

The radius of first orbit of hydrogen atom

Question # 28

The number of spherical nodes in 3p orbitals are

Question # 29

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

Question # 30

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

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
  • M
    M. Ibrar 31 - May - 2024 06 Min 39 Sec 90/120
  • 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
  • A
    Abdul Rafay 17 - Oct - 2024 08 Min 05 Sec 55/120

ECAT Class Chemistry Chapter 5 Important MCQ's

Sr.# Question Answer
1 The radius of first orbit of hydrogen atom
A. 0.329 A°
B. 0.429 A°
C. 0.529 A°
D. 0.229 A°
2 The size of electronic shell is described by
A. Azimuthal Q. no
B. Magnetic Q.No
C. Spin Q. No
D. Principle Q. No
3
Question Image
A. Plank's equations
B. de Broglie's equations
C. Heisenburg's equation
D. None
4 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
5 The divisibility of atom was shown by
A. Stoney
B. J.J. Thomson
C. Millikan
D. Rutherford
6
Question Image
A. s
B. p
C. d
D. f
7 Orbital having same energy is called:
A. Hybrid orbital.
B. Valence orbital.
C. Degenerate orbital.
D. D-orbital.
8 Quantum number value for 2p orbitals are:
A. n=2 ,l=1
B. n=1 ,l=2
C. n= ,l=0
D. n=2 ,l=0
9 Rutherford's experiment led to the discovery of
A. Nucleus
B. Electron
C. Proton
D. alpha particle
10 Which of the atoms has 1s2, 2s2, 2px22p1y2p1zconfiguration
A. Nitrogen
B. Carbon
C. Fluorine
D. Oxygen

Test Questions

Is this page helpful?