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

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

Question # 2

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

Question # 3

The nature of positive ray depend on:

Question # 4

Which of the following is not a sub-atomic particle

Question # 5

Which of the following orbitals have a dumb bell shape?

Question # 6

The radiations with wavelength shorter than violet light are called

Question # 7

Balmer's series is in ______ region

Question # 8

Heaviest particle is

Question # 9

The configuration 1s22s22p53s1shows

Question # 10

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

Question # 11

Effective magnetic moment of Sc3+ion is

Question # 12

The total number of orbitals in a shell with principal quantum number 'n' is

Question # 13

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

Question # 14

Neutron was discovered by:

Question # 15

A 4f orbital has

Question # 16

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

Question # 17

The energy of ionization of an atom is the energy difference between orbital

Question # 18

The principle quantum number describes

Question # 19

Rutherford's atomic model suggests the existence of

Question # 20

E = hv is the

Question # 21

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

Question # 22

Which have better penetrating power

Question # 23

1 erg of energy corresponds to

Question # 24

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

Question # 25

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

Question # 26

Which of the following element's outermost orbits last electron has magnetic quantum number m=0?

Question # 27

The value of charge on electron is

Question # 28

No cathode rays are produced in the discharged tube when gas is under ordinary pressure even if voltage of 5000 to 10000 is applies. This reason is

Question # 29

The mass of the neutron is of the order of

Question # 30

The divisibility of atom was shown by

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ECAT Chemistry Chapter 5 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 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
4 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.
5 For which of the following sets of quantum numbers and electron will have the highest energy?
A. 3,2,1,1/2
B. 4,2,-1,1/2
C. 4,1,0,-1/2
D. 5,0,0,1/2
6 Which of the following is not a sub-atomic particle
A. Electron
B. Proton
C. Neutron
D. Deuteron
7 When 3p orbital is complete, the entering electron goes into
A. 4s
B. 3d
C. 4p
D. 4f
8 In Bohr model of hydrogen atom the distance between adjacent orbits increases away from the nucleus, the energy difference between the orbits
A. Increases
B. Decreases
C. Reaming same
D. Orbits coincide
9 The arrangement of subshells in the ascending order of their energy on complete filing of 4f subshell the entering electrons goes to
A. 5s
B. 5p
C. 5d
D. 5f
10

Mass of simple electron is:
A.

9.1 x 10-31 kg

B.

9.1 x 10-30 kg

C.

1.66 x 10-31 kg

D.

9.1 x 10-31 kg

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