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

Balmer's series is in ______ region

Question # 2

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

Question # 3

Alpha rays consist of:

Question # 4

The principle quantum number describes

Question # 5

When an electric current is passed through discharge tube at low pressure, cathode rays are emitted from cathode these rays consist of:

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

The total number of orbitals possible for the quantum number n is

Question # 10

Proton was discovered by:

Question # 11

The value of R (Rydberg's constant) is _______ m-1

Question # 12

Which of the following has more unpaired d-electrons?

Question # 13

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

Question # 14

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

Question # 15

Bohr model of atom is contradicted by:

Question # 16

Anode is the surface on which probability of finding electron is:

Question # 17

Rutherford's model of atom failed because:

Question # 18

Photons of yellow colour are ______ energetic than violet colour

Question # 19

Which of the following is not charged particle

Question # 20

The e.m value for positive rays maximum for:

Question # 21

Pauli's principle is applicable to

Question # 22

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

Question # 23

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

Question # 24

The correct set of quantum numbers (n,l and m) respectively of the unpaired electron of chlorine atom is

Question # 25

e/m of cathode rays is same but for positive rays e/m changes by changing gas in the discharge tube because

Question # 26

The configuration 1s22s22p53s1shows

Question # 27

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

Question # 28

The charge over mass ratio of electron is:

Question # 29

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

Question # 30

E = hv is the

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ECAT Chemistry Chapter 5 Important MCQ's

Sr.# Question Answer
1
Question Image
A. Neutrons are attracted by nucleus
B. Neutrons carry out nuclear reactions
C. Neutrons carry no charge
D. Neutrons are electromagnetic radiations
2 The spectrum of He is expected to be similar to that of
A. H
B. Na
C. He+
D. Li+
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 The range of visible spectrum is
A. 300 - 600 nm
B. 600 - 900 nm
C. 400 - 750 nm
D. 100 - 300 nm
5 When 6d orbital is complete, the entering electron goes into:
A. 7f.
B. 7s.
C. 7p.
D. 7d.
6 The limiting line of Blamer series in hydrogen spectrum lies in
A. Visible regions
B. Ultraviolet region
C. Infrared region
D. x-rays region
7 Charge of an electron is:
A.

1.6 x 10-19 C

B.

9.1 x 10-34 C

C.

1.7588 x 1011 C

D.

6.62 x 10-34 C
8 Rutherford's experiment led to the discovery of
A. Nucleus
B. Electron
C. Proton
D. alpha particle
9 E = hv is the
A. Spectral equation
B. Plank's equation
C. de Broglie's equation
D. None of these
10 When cathode rays strike the anode metal X-rays are emitted and not the positive rays because
A. Cathode rays are material particles
B. Cathode rays knock out electrons from anode, which emit X-rays when outer electron take their place
C. Cathode rays are absorbed by the nucleus
D. Cathode rays become heated

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