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

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

Question # 2

The number of electrons in the M shell of the element with atomic number 24 is

Question # 3

The uncertainty principle was stated only

Question # 4

The number of neutrons in the element 94Be is

Question # 5

Which one of the following particles has amass 1/1836 time, that of hydrogen?

Question # 6

The radius of second Bohr's orbit is

Question # 7

Charge of an electron is:

Question # 8

For principle quantum number n=4, the total number of orbitals having l = 3 is

Question # 9

Which of the following is not charged particle

Question # 10

Which of the following has more unpaired d-electrons?

Question # 11

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

Question # 12

Photons of yellow colour are ______ energetic than violet colour

Question # 13

The energy of the first electron is helium will be

Question # 14

When 6s orbital is complete then next electron goes to

Question # 15

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

Question # 16

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

Question # 17

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

Question # 18

The orbitals having n + l = 5 are

Question # 19

Balmer's series is in ______ region

Question # 20

The radius of first orbit of hydrogen atom

Question # 21

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

Question # 22

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

Question # 23

Which have better penetrating power

Question # 24

The limiting line of Blamer series in hydrogen spectrum lies in

Question # 25

When 6d orbital is complete, the entering electron goes into:

Question # 26

In which of the following pairs, the numbers of electrons in the outermost shell are different?

Question # 27

The quantum number which describe the orientation of the orbitals is

Question # 28

Rutherford's experiment led to the discovery of

Question # 29

Light emitted from a source has its wave length 500nm, then its wave number will be

Question # 30

In Bohr model of hydrogen atom the distance between adjacent orbits increases away from the nucleus, the energy difference between the orbits

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 Which quantum number is sufficient to describe the electron is hydrogen atom?
A. l
B. n
C. m
D. s
2 Balmer's series is in ______ region
A. Visible
B. U V
C. I. R.
D. None
3 Their e/m, ratio resembles with that of electrons
A. Alpha rays
B. Beta rays
C. Gamma rays
D. X-rays
4 The third line of the Balmer series, in the emission spectrum of the hydrogen atom,is due to the transition from the
A. Fourth Bohr orbit to the first Bohr orbit
B. Fifth Bohr orbit to the second Bohr orbit
C. Sixth Bohr orbit to the third Bohr orbit
D. Seventh Bohr orbit to the third Bohr orbit
5 When the electron jumps form third, fourth, fifth orbits to the second orbit, the transitions are known as
A. Paschen
B. Pfund
C. Balmer
D. Brackett
6 Which is not true with respect to cathode rays?
A. A stream of electrons
B. Charged particles
C. Move with speed as that of light
D. Can be deflected by magnetic fields
7 The de-Brogile wavelength of a particle with mass 1g and velocity 100 m/s is
A. 6.63 x 10-33m
B. 6.63 x 10-34m
C. 6.63 x 10-35m
D. 6.65 x 10-35m
8 The divisibility of atom was shown by
A. Stoney
B. J.J. Thomson
C. Millikan
D. Rutherford
9 Find the magnetic moment of a divalent ion in aqueous solution if its atomic number is 25
A. 3.0 BM
B. 4.9 BM
C. 5.9 BM
D. 6.9 BM
10 The e.m value for positive rays maximum for:
A. Oxygen.
B. Nitrogen.
C. Helium.
D. Hydrogen.

Test Questions

Is this page helpful?

Share your comments & questions here

Guest

  • No comments yet. Be the first to comment!