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

00:00
Question # 1

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

Question # 2

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

Question # 3

The size of electronic shell is described by

Question # 4

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

Question # 5

Which of the following is not charged particle

Question # 6

When potassium metal is exposed to violet light

Question # 7

Balmer's series is in ______ region

Question # 8

The nature of the positive rays depend on

Question # 9

Bohr model of atom is contradicted by:

Question # 10

Azimuthal quantum number of last electron of 11Na is

Question # 11

The uncertainty principle was stated only

Question # 12

Pauli's principle is applicable to

Question # 13

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

Question # 14

When the 6d orbital is completed the entering electron goes into

Question # 15

The radiations with wavelength shorter than violet light are called

Question # 16

The rules which describe the distribution of electron in atomic energy levels are Auf-ban principle, Pauli's exclusion principle. Hunds rule. The pauli exclusion principle refers to the

Question # 17

A 4f orbital has

Question # 18

The orbital in Rutherford's model is

Question # 19

Which have better penetrating power

Question # 20

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

Question # 21

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

Question # 22

E = hv is the

Question # 23

The number of neutrons in the element 94Be is

Question # 24

The de-Brogile wavelength of a particle with mass 1g and velocity 100 m/s is

Question # 25

When the electron jumps form second third, fourth orbit to the fist orbit, the transitions are known as

Question # 26

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

Question # 27

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

Question # 28

Heaviest particle is

Question # 29

Effective magnetic moment of Sc3+ion is

Question # 30

Rutherford's experiment led to the discovery of

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ECAT Chemistry Chapter 5 Important MCQ's

Sr.# Question Answer
1 Which of the following has more unpaired d-electrons?
A. Zn+
B. Fe2+
C. Ni3+
D. Cu+
2 Which quantum number is sufficient to describe the electron is hydrogen atom?
A. l
B. n
C. m
D. s
3 Splitting of spectral lines of the hydrogen atom under the influence or magnetic field is called
A. Stark effect
B. Zeeman effect
C. Compton effect
D. Photoelectric effect
4 Charge to mass ratio of electron was discovered by:
A. Millika.
B. Rutherford.
C. J.J. Thomson.
D. Chadwick.
5 The charge of an electron is determined by
A. J.J. Thomson
B. Crooks
C. Perrin
D. R.A.Millikan
6 The radius of second Bohr's orbit is
A. 0.053 nm
B. 0.053/4 nm
C. 0.053 x 4 nm
D. 0.053 x 20 nm
7 The mass of the neutron is of the order of
A. 10-23 kg
B. 10-24kg
C. 10-26kg
D. 10-27kg
8 E = hv is the
A. Spectral equation
B. Plank's equation
C. de Broglie's equation
D. None of these
9 The spectrum of helium is expected to be similar to that of
A. H
B. Li+
C. Na
D. He+
10 The orbital in Rutherford's model is
A. Spiral
B. Circular
C. Both
D. None

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