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

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 # 2

The divisibility of atom was shown by

Question # 3

The de-Brogile wavelength of a particle with mass 1g and velocity 100 m/s is

Question # 4

The electron in an atom

Question # 5

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

Question # 6

Cathode rays emitted from cathode are

Question # 7

When potassium metal is exposed to violet light

Question # 8

When 6s orbital is complete then next electron goes to

Question # 9

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

Question # 10

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

Question # 11

The credit of discovering neutron goes to

Question # 12

Balmer's series is in ______ region

Question # 13

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

Question # 14

When electrons revolve in stationary orbits

Question # 15

The charge over mass ratio of electron is:

Question # 16

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

Question # 17

The range of visible spectrum is

Question # 18

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

Question # 19

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

Question # 20

Smallest charge of electricity that has been measured so far is

Question # 21

Heaviest particle is

Question # 22

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

Question # 23

Which of the following is not isoelectronic?

Question # 24

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

Question # 25

A 4f orbital has

Question # 26

The wave number of light emitted by a certain source is 2 x 105m. The wavelength of this light will be:

Question # 27

Which have better penetrating power

Question # 28

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

Question # 29

The quantum number which determines the shape of the orbital is

Question # 30

Number of neutrons in heavy hydrogen atom is

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 6d orbital is completed the entering electron goes into
A. 7f
B. 7 s
C. 7 p
D. 7 d
2 The electron in an atom
A. moves randomly around the nucleus
B. has fixed space around the nucleus
C. is stationary in various energy levels
D. moves around its nucleus in definite energy levels
3 The value of Plank's constant 'h' is
A. 6.625 x 10-34
B. 6.625 x 10-34J sec
C. 6.625 x 10-34KJ
D. 6.625 x 10-34K Cal
4 The configuration 1s22s22p53s1shows
A. Excited state of O2
B. Excited state of neon
C. Excited state of fluorine
D. Ground state of fluorine atom
5 When cathode rays strike the anode metal X-rays are emitted and not the positive rays because
A. Cathode rays are material particles
B. Cathode rays knock out electrons from anode, which emit X-rays when outer electron take their place
C. Cathode rays are absorbed by the nucleus
D. Cathode rays become heated
6 The wave length of electron as wave is 0.5 nm. What is the wave length in meter
A. 5 x 10-9
B. 5 x 10-12
C. 5 x 10-6
D. 5 x 10-10
7 Spectrum of white light is continuous becuase
A. Colors separated by dark spaces
B. There are no boundary lines between the colours
C. The radiations are in infrared region
D. The radiatins fall in ultraviolet region
8 The total number of orbitals possible for the quantum number n is
A. n
B. n2
C. 2n
D. 2n2
9 The total values of magnetic quantum number of subshell are five, the subshell is
A. S-subshell
B. P-subshell
C. D-subshell
D. F-subshell
10 Splitting of spectral lines of the hydrogen atom under the influence or magnetic field is called
A. Stark effect
B. Zeeman effect
C. Compton effect
D. Photoelectric effect

Test Questions

Is this page helpful?

Share your comments & questions here

Guest

  • No comments yet. Be the first to comment!