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MCQ's Test For ECAT Chemistry Chapter 5 Atomic Structure
Try The MCQ's Test For ECAT Chemistry Chapter 5 Atomic Structure
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Total Questions30
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Time Allowed30
ECAT Chemistry Chapter 5 Atomic Structure
00:00
Question # 1
Effective magnetic moment of Sc3+ion is
Question # 2
Find the magnetic moment of a divalent ion in aqueous solution if its atomic number is 25
Question # 3
The charge of an electron is determined by
Question # 4
The nature of positive ray depend on:
Question # 5
In Millikan method the oil droplet falls under the force of gravity but it moves upward due to
Question # 6
An electron with n = 3 , l = 2 will be in the sub-shell
Question # 7
Which of the following particles has longest wavelength, if they have same speed:
Question # 8
Which of the following is not a property of cathode rays
Question # 9
When the electron jumps form third, fourth, fifth orbits to the second orbit, the transitions are known as
Question # 10
Negatively charged particle nature of cathode rays was first demonstrated in 1895 by:
Question # 11
Which have better penetrating power
Question # 12
Energy of electron in first orbit of H atom is
Question # 13
When potassium metal is exposed to violet light
Question # 14
The quantum number which describes the shape of the orbital is
Question # 15
Neutron was discovered by:
Question # 16
Charge on electron was discovered by:
Question # 17
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 # 18
The energy of the first electron is helium will be
Question # 19
The wave number of the light emitted by a certain source is 2 x 106m-1. The wavelength of this light will be
Question # 20
Which quantum number is sufficient to describe the electron is hydrogen atom?
Question # 21
With the reference of w/m ratio of anode rays, the e/m ratio of cathode rays s:
Question # 22
Balmer's series is in ______ region
Question # 23
The e.m value for positive rays maximum for:
Question # 24
The velocity of photon is:
Question # 25
For principle quantum number n=4, the total number of orbitals having l = 3 is
Question # 26
The de-Brogile wavelength of a particle with mass 1g and velocity 100 m/s is
Question # 27
In the ground state of an atom the electron is present
Question # 28
The four quantum numbers of the valency electron of potassium are
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
Which one of the following particles has amass 1/1836 time, that of hydrogen?
Top Scorers Of ECAT Chemistry Chapter 5 Atomic Structure MCQ`s Test
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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 | Energy of electron in the infinite Bohr orbit of H-atom is |
A. 0 KJ/mole
B. 1 KJ/mole
C. -1 KJ/mole
D. -1313.32 KJ/mole
|
| 2 | 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.
|
| 3 | The total number of possible values of magnetic quantum number for the value of l=3 is |
A. 3
B. 1
C. 5
D. 7
|
| 4 | The velocity of photon is: |
A. Independent of its wavelength.
B. Depends on its wavelength.
C. Equal to square of its amplitude
D. Depends on its source.
|
| 5 | The total number of orbitals in a shell with principal quantum number 'n' is |
A. 2n
B. 2n2
C. n2
D. n + 1
|
| 6 | Alpha rays consist of: |
A. Neutrons.
B. Helium nucleus.
C. Protons.
D. Hydrogen nucleus.
|
| 7 | Heaviest particle is |
A. Meson
B. Neutron
C. Proton
D. Electron
|
| 8 | The orbital in Rutherford's model is |
A. Spiral
B. Circular
C. Both
D. None
|
| 9 |
|
A. Plank's equations
B. de Broglie's equations
C. Heisenburg's equation
D. None
|
| 10 | The spectrum of helium is expected to be similar to that of |
A. H
B. Li+
C. Na
D. He+
|
Test Questions