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 degenerate orbitals p-sub shell are

Question # 2

The nature of the positive rays depend on

Question # 3

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

Question # 4

The wave number of the line emitted is 109.678 x 105m-1in the Lyman series when electron transition occurs

Question # 5

Spectrum of white light is continuous becuase

Question # 6

Balmer's series is in ______ region

Question # 7

The total number of possible values of magnetic quantum number for the value of l=3 is

Question # 8

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

Question # 9

The quantum number which describe the orientation of the orbitals is

Question # 10

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

Question # 11

Rutherford's experiment led to the discovery of

Question # 12

With increasing principle quantum number, the energy difference between adjacent energy levels in H atom

Question # 13

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

Question # 14

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

Question # 15

Electrons arranged in orbitals according to the increasing order of their n + l values, this rule is named as

Question # 16

The quantum number which determines the shape of the orbital is

Question # 17

The radiations with wavelength shorter than violet light are called

Question # 18

An electron with n = 3 , l = 2 will be in the sub-shell

Question # 19

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

Question # 20

Orbitals having same energy are called

Question # 21

Subsidiary quantum number specifies

Question # 22

E = hv is the

Question # 23

When 6s orbital is complete then next electron goes to

Question # 24

The configuration 1s22s22p53s1shows

Question # 25

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

Question # 26

Which one of the following statements is true about discovery of neutrons?

Question # 27

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

Question # 28

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

Question # 29

Which have better penetrating power

Question # 30

Energy of electron in an orbit according to Bohr theory is negative due to

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ECAT Chemistry Chapter 5 Important MCQ's

Sr.# Question Answer
1 If the value of principal quantum number is 3. the total possible values for magnetic quantum number will be
A. 1
B. 4
C. 9
D. 12
2 Subsidiary quantum number specifies
A. size of orbital
B. shape of orbital
C. orientations of orbitals
D. Nuclear stability
3 The valence orbital configuration of an element with atomic number 23 is
A. 3d5
B. 3d3, 4s2
C. 3d3, 4s1, 4p1
D. 3d2,4s2,4p1
4 Balmer's series is in ______ region
A. Visible
B. U V
C. I. R.
D. None
5 The nature of positive ray depend on:
A. The nature of electrode.
B. The nature of discharge tube.
C. The nature of residual gas.
D. All of above.
6 Number of neutrons in heavy hydrogen atom is
A. 0
B. 1
C. 2
D. 3
7 The quantum number which determines the shape of the orbital is
A. principal
B. azimuthal
C. magnetic
D. spin
8 Orbitals having same energy are called
A. Hybrid orbitals
B. Valence orbitals
C. Degenerate orbitals
D. D-orbitals
9 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
10 The value of Plank's constant 'h' is
A. 6.625 x 10-34
B. 6.625 x 10-34J sec
C. 6.625 x 10-34KJ
D. 6.625 x 10-34K Cal

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