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

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

Question # 2

The radius of second Bohr's orbit is

Question # 3

Subsidiary quantum number specifies

Question # 4

The radius of first orbit of hydrogen atom

Question # 5

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

Question # 6

Electrons arranged in orbitals according to the increasing order of their n + l values, this rule is named as

Question # 7

Pauli's principle is applicable to

Question # 8

The radius of first orbit of H-atom is

Question # 9

Their e/m, ratio resembles with that of electrons

Question # 10

The size of electronic shell is described by

Question # 11

Rutherford's model of atom failed because:

Question # 12

The order of distance between the various Bohr orbits is

Question # 13

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

Question # 14

Which of the following orbitals have a dumb bell shape?

Question # 15

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

Question # 16

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

Question # 17

Four d-orbitals contain four lobes while fifth contains only two lobes the orbital is

Question # 18

For which of the following sets of quantum numbers and electron will have the highest energy?

Question # 19

Sodium chloride imparts a yellow colour to the Bunsen flame. This can be interpreted due to the

Question # 20

Number of neutrons in heavy hydrogen atom is

Question # 21

Charge on electron was discovered by:

Question # 22

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

Question # 23

The radiations with wavelength shorter than violet light are called

Question # 24

The value of Plank's constant 'h' is

Question # 25

The quantum number which describe the orientation of the orbitals is

Question # 26

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

Question # 27

The energy of the first electron is helium will be

Question # 28

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

Question # 29

The atomic number of an element is 35 what is the total number of electrons present in all the p-orbitals of the ground state atom of that element?

Question # 30

Bohr model of atom is contradicted by:

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
  • A
    Abdul Rafay 17 - Oct - 2024 08 Min 05 Sec 55/120
  • B
    Babar Saeed 08 - Jun - 2024 13 Min 04 Sec 55/120

ECAT Chemistry Chapter 5 Important MCQ's

Sr.# Question Answer
1 When 3p orbital is complete, the entering electron goes into
A. 4s
B. 3d
C. 4p
D. 4f
2 Which one of the following statements is true about discovery of neutrons?
A. These particles were formed by the bombardment of Alpha-particles on Beryllium.
B. These particles are formed by the spiting of alpha-particles.
C. These particles were discovered by natural radioactivity.
D. None of above.
3 When an electric current is passed through discharge tube at low pressure, cathode rays are emitted from cathode these rays consist of:
A. Alpha rays.
B. Negative particles.
C. Electromagnetic rays.
D. Positive particles.
4 Splitting of spectral lines when atoms are subjected to strong electron field is called
A. Zeeman effect
B. Stark effect
C. Photoelectric effect
D. Compton effect
5 The spectrum of He is expected to be similar to that of
A. H
B. Na
C. He+
D. Li+
6 With increasing principle quantum number, the energy difference between adjacent energy levels in H atom
A. Decreases
B. Increases
C. Remains constant
D. Decreases for low value of Z and increase for higher value of Z
7 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
8 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
A. 12 and 4
B. 16 and 5
C. 16 and 4
D. 12 and 5
9 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
10 Quantum number values for 2p orbitals are
A. n = 2, l = 1
B. n = 1, l = 2
C. n = 1, l = 0
D. n = 2, l = 0

Test Questions

Is this page helpful?

Share your comments & questions here

Guest

  • No comments yet. Be the first to comment!