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

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ECAT Chemistry Chapter 5 Atomic Structure

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Question # 1

The uncertainty principle was stated only

Question # 2

The nature of positive rays depend on:

Question # 3

The velocity of photon is:

Question # 4

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

Question # 5

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

Question # 6

Rutherford's planetary like picture of the atomic modal was defective because

Question # 7

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

Question # 8

The value of charge on electron is

Question # 9

With the reference of w/m ratio of anode rays, the e/m ratio of cathode rays s:

Question # 10

The charge over mass ratio of electron is:

Question # 11

n + l value for 4f will

Question # 12

The configuration 1s22s22p53s1shows

Question # 13

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

Question # 14

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

Question # 15

Cathode rays emitted from cathode are

Question # 16

Electrons in degenerate orbitals are placed in separate orbitals with same spin according to

Question # 17

Maximum potential energy that an electron can have within the atom is:

Question # 18

Orbital having same energy is called:

Question # 19

When potassium metal is exposed to violet light

Question # 20

The value of Plank's constant 'h' is

Question # 21

Charge of an electron is:

Question # 22

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

Question # 23

Rutherford's atomic model suggests the existence of

Question # 24

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

Question # 25

The e.m value for positive rays maximum for:

Question # 26

The radiations with wavelength shorter than violet light are called

Question # 27

Pauli's principle is applicable to

Question # 28

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

Question # 29

Which of the following was discovered first:

Question # 30

Balmer's series is in ______ region

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ECAT Chemistry Chapter 5 Important MCQ's

Sr.# Question Answer
1 Neutrons was discovered by
A. Mosely
B. Milliken
C. Chadwick
D. Ruherford
2 The size of electronic shell is described by
A. Azimuthal Q. no
B. Magnetic Q.No
C. Spin Q. No
D. Principle Q. No
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 divisibility of atom was shown by
A. Stoney
B. J.J. Thomson
C. Millikan
D. Rutherford
5 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
6 Which of the following is not charged particle
A. Proton
B. Electron
C. Neutron
D. Hydrogen nucleus
7 In the atomic emission spectrum the lines which appear bright, appear dark in absorption spectrum because
A. The radiations emitted in emission spectrum are absorbed in absorption spectrum
B. Atomic emission spectrum is continuous
C. Atomic absorption spectrum is continuous
D. Distance between the lines increases
8 The uncertainty principle was stated only
A. De Brogilie
B. Heinsenberg
C. Einstein
D. Schrodinger
9 The orbital in Rutherford's model is
A. Spiral
B. Circular
C. Both
D. None
10 Which of the following is not a property of cathode rays
A. They can produce x-rays when they strike a heavy metal anode
B. They can cause reduction reaction
C. They produce fluorescence in rare earth and minerals
D. They comprise neutral particles

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