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

The radius of second Bohr's orbit is

Question # 2

Which of the following is not a property of cathode rays

Question # 3

The value of charge on electron is

Question # 4

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

Question # 5

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

Question # 6

The nature of positive ray depend on:

Question # 7

Which of the following particles has longest wavelength, if they have same speed:

Question # 8

Quantum number value for 2p orbitals are:

Question # 9

If the value of azimuthal quantum number is 3, then values of m the magnetic quantum no. will be

Question # 10

When 6s orbital is complete then next electron goes to

Question # 11

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

Question # 12

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

Question # 13

The e.m value for positive rays maximum for:

Question # 14

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

Question # 15

When 3p orbital is complete, the entering electron goes into

Question # 16

Which of the following orbitals have a dumb bell shape?

Question # 17

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

Question # 18

Proton was discovered by:

Question # 19

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

Question # 20

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

Question # 21

Which is not true with respect to cathode rays?

Question # 22

Heaviest particle is

Question # 23

Effective magnetic moment of Sc3+ion is

Question # 24

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

Question # 25

The mass of the neutron is of the order of

Question # 26

Which of the following was discovered first:

Question # 27

Which of the following has more unpaired d-electrons?

Question # 28

In the ground state, an element has 13 electrons in its M shell. The element is

Question # 29

When potassium metal is exposed to violet light

Question # 30

The spectrum of He is expected to be similar to that of

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 Chemistry Chapter 5 Important MCQ's

Sr.# Question Answer
1 Which of the following element's outermost orbits last electron has magnetic quantum number m=0?
A. Na
B. O
C. Cl
D. N
2 Sodium chloride imparts a yellow colour to the Bunsen flame. This can be interpreted due to the
A. low ionization energy of sodium
B. sublimation of metallic sodium to give yellow vapour
C. emission of excess energy absorbed as a radiation in the visible region as a radiation in the visible region
D. photosenitivity
3 For which of the following sets of quantum numbers and electron will have the highest energy?
A. 3,2,1,1/2
B. 4,2,-1,1/2
C. 4,1,0,-1/2
D. 5,0,0,1/2
4 When electron jumps from n2= 2,3,4,5,.... orbit to n1= 1 orbit in the hydrogen atom, the radiations emitted give the spectral lines
A. Lyman series
B. Blamer series
C. Paschen series
D. Brackett series
5 The e.m value for positive rays maximum for:
A. Oxygen.
B. Nitrogen.
C. Helium.
D. Hydrogen.
6 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.
7 The radiations with wavelength shorter than violet light are called
A. Ultraviolet
B. Infrared
C. Microwave
D. Radio frequency
8 Electrons arranged in orbitals according to the increasing order of their n + l values, this rule is named as
A. Hund's rule
B. Heisenberg's principle
C. Paulit exclusion principle
D. Auf bau principle
9 The uncertainty principle was stated only
A. De Brogilie
B. Heinsenberg
C. Einstein
D. Schrodinger
10 Rutherford's planetary like picture of the atomic modal was defective because
A. It did not describe the quantity of positive charge
B. It did not explain the repulsion of protons within the nucleus
C. No empty space between nucleus and the electrons
D. Moving electron should radiate energy

Test Questions

Is this page helpful?