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 of the following was discovered first:

Question # 2

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

Question # 3

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

Question # 4

The arrangement of subshells in the ascending order of their energy on complete filing of 4f subshell the entering electrons goes to

Question # 5

The orbital in Rutherford's model is

Question # 6

The degenerate orbitals p-sub shell are

Question # 7

In the ground state of an atom the electron is present

Question # 8

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

Question # 9

The third line of the Balmer series, in the emission spectrum of the hydrogen atom,is due to the transition from the

Question # 10

Their e/m, ratio resembles with that of electrons

Question # 11

Heaviest particle is

Question # 12

Which of the following is not isoelectronic?

Question # 13

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

Question # 14

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

Question # 15

When 6s orbital is complete then next electron goes to

Question # 16

Azimuthal quantum number of last electron of 11Na is

Question # 17

The range of visible spectrum is

Question # 18

When electrons revolve in stationary orbits

Question # 19

Find the magnetic moment of a divalent ion in aqueous solution if its atomic number is 25

Question # 20

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

Question # 21

Charge of an electron is:

Question # 22

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

Question # 23

The orbitals having n + l = 5 are

Question # 24

The value of charge on electron is

Question # 25

The mass of the neutron is of the order of

Question # 26

Spectrum of white light is continuous becuase

Question # 27

The credit of discovering neutron goes to

Question # 28

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

Question # 29

The radius of first orbit of H-atom is

Question # 30

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

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
  • 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 Neutrons was discovered by
A. Mosely
B. Milliken
C. Chadwick
D. Ruherford
2 Light emitted from a source has its wave length 500nm, then its wave number will be
A. 2 x 106m-1
B. 2 x 107m-1
C. 5 x 108 m-1
D. 5 x 109m-1
3 In which of the following pairs, the numbers of electrons in the outermost shell are different?
A. As,Sb
B. Ge,Sn
C. In,pt
D. Se,Te
4 What is the packet of energy called?
A. Electron
B. Photon
C. Positron
D. Proton
5 No cathode rays are produced in the discharged tube when gas is under ordinary pressure even if voltage of 5000 to 10000 is applies. This reason is
A. Voltage is low
B. Discharge tube is not coloured
C. Gas does not conduct current under ordinary pressure
D. Temperature low
6 Proton was discovered by:
A. Chadwick
B. J.J. Rhomson
C. Millikan.
D. Goldstein.
7 The orbital in Rutherford's model is
A. Spiral
B. Circular
C. Both
D. None
8 The number of neutrons in the element 94Be is
A. 4
B. 5
C. 9
D. 13
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 The total number of orbitals possible for the quantum number n is
A. n
B. n2
C. 2n
D. 2n2

Test Questions

Is this page helpful?