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

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

Question # 2

The radius of second Bohr's orbit is

Question # 3

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 # 4

Spectrum of white light is continuous becuase

Question # 5

Which of the following is not a property of cathode rays

Question # 6

Which of the following is not isoelectronic?

Question # 7

The uncertainty principle was stated only

Question # 8

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

Question # 9

Charge to mass ratio of electron was discovered by:

Question # 10

Find the magnetic moment of a divalent ion in aqueous solution if its atomic number is 25

Question # 11

The limiting line of Blamer series in hydrogen spectrum lies in

Question # 12

Bohr model of atom is contradicted by:

Question # 13

The quantum number which determines the shape of the orbital is

Question # 14

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

Question # 15

Proton was discovered by:

Question # 16

The configuration 1s22s22p53s1shows

Question # 17

The third line of the Balmer series, in the emission spectrum of the hydrogen atom,is due to the transition from the

Question # 18

Orbitals having same energy are called

Question # 19

The order of distance between the various Bohr orbits is

Question # 20

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

Question # 21

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

Question # 22

Which have better penetrating power

Question # 23

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

Question # 24

What is the packet of energy called?

Question # 25

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

Question # 26

The symbol of the element whose atoms have the outer most electronic configuration 2s22p3is

Question # 27

Neutron was discovered by:

Question # 28

The degenerate orbitals p-sub shell are

Question # 29

The spectrum of He is expected to be similar to that of

Question # 30

The number of neutrons in the element 94Be is

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ECAT Chemistry Chapter 5 Important MCQ's

Sr.# Question Answer
1 The order of distance between the various Bohr orbits is
A. r2- r1> r3- r2> r4- r3> ......
B. r1> r2> r2- r3> r4-r3> .....
C. r2-r1= r3- r2= r4- r3> .....
D. r2- r1> r3- r2< r4- r3< ....
2 Which of the following is not a sub-atomic particle
A. Electron
B. Proton
C. Neutron
D. Deuteron
3 Schrodinger wave equation describes electron completely because
A. It describes a set of four quantum number
B. It describes the particle nature of electron
C. It measures wavelength of electron
D. It describes electron moving in specific orbit
4 The symbol of the element whose atoms have the outer most electronic configuration 2s22p3is
A. N
B. Li
C. P
D. Na
5 The atomic number of an element is 35 what is the total number of electrons present in all the p-orbitals of the ground state atom of that element?
A. 6
B. 11
C. 17
D. 23
6 The order of frequency of the following radiations unltraviolet, visible, infrared and microwave is
A. Microwave > infrared > visible > ultraviolet
B. Visible > ultraviolet > microwave > infrared
C. Ultraviolet > visible > infrared > microwave
D. Infrared > microwave > ultraviolet > visible
7 Which of the following is not isoelectronic?
A. Na+
B. Mg2+
C. O2-
D. Cl-
8 The maximum number of electrons in a subshell for which l = 3 is
A. 14
B. 10
C. 8
D. 4
9 The quantum number which describes the shape of the orbital is
A. Principle quantum number
B. Spin quantum number
C. Azimathal quantum number
D. Magnetic quantum number
10 Splitting of spectral lines when atoms are subjected to strong electron field is called
A. Zeeman effect
B. Stark effect
C. Photoelectric effect
D. Compton effect

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