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 is not true with respect to cathode rays?

Question # 2

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

Question # 3

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

Question # 4

The uncertainty principle was stated only

Question # 5

Which of the following is not a sub-atomic particle

Question # 6

The number of de-electrons retained in Fe2+ (At.No. of Fe = 26) ions is

Question # 7

Neutron was discovered by:

Question # 8

The quantum number which describes the shape of the orbital is

Question # 9

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 # 10

Cathode rays emitted from cathode are

Question # 11

Which have better penetrating power

Question # 12

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

Question # 13

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

Question # 14

The limiting line of Blamer series in hydrogen spectrum lies in

Question # 15

When potassium metal is exposed to violet light

Question # 16

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

Question # 17

Neutrons was discovered by

Question # 18

The ratio of the ionization energy of H and Be3+is

Question # 19

The quantum number which describe the orientation of the orbitals is

Question # 20

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

Question # 21

The value of charge on electron is

Question # 22

The experimental evidences for the existence of atomic nucleus comes from:

Question # 23

In Millikan method for determination of charge on electron the air in the chamber is ionized by

Question # 24

Splitting of spectral lines of the hydrogen atom under the influence or magnetic field is called

Question # 25

Which of the following orbitals have a dumb bell shape?

Question # 26

Which of the following is not isoelectronic?

Question # 27

Heaviest particle is

Question # 28

With increasing principle quantum number, the energy difference between adjacent energy levels in H atom

Question # 29

The configuration 1s22s22p53s1shows

Question # 30

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

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 If the value of principal quantum number is 3. the total possible values for magnetic quantum number will be
A. 1
B. 4
C. 9
D. 12
2 The spectrum of helium is expected to be similar to that of
A. H
B. Li+
C. Na
D. He+
3 The wave number of the light emitted by a certain source is 2 x 106m-1. The wavelength of this light will be
A. 500 nm
B. 500 m
C. 200 nm
D. 5 x 107m
4 Rutherford's experiment led to the discovery of
A. Nucleus
B. Electron
C. Proton
D. alpha particle
5 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< ....
6 Orbital having same energy is called:
A. Hybrid orbital.
B. Valence orbital.
C. Degenerate orbital.
D. D-orbital.
7 The configuration 1s22s22p53s1shows
A. Excited state of O2
B. Excited state of neon
C. Excited state of fluorine
D. Ground state of fluorine atom
8 Their e/m, ratio resembles with that of electrons
A. Alpha rays
B. Beta rays
C. Gamma rays
D. X-rays
9 Effective magnetic moment of Sc3+ion is
A. 1.73
B. 0
C. 5.92
D. 2.83
10 The radius of second Bohr's orbit is
A. 0.053 nm
B. 0.053/4 nm
C. 0.053 x 4 nm
D. 0.053 x 20 nm

Test Questions

Is this page helpful?