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 value of charge on electron is

Question # 2

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

Question # 3

The nature of the positive rays depend on

Question # 4

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

Question # 5

The limiting line of Blamer series in hydrogen spectrum lies in

Question # 6

The total values of magnetic quantum number of subshell are five, the subshell is

Question # 7

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

Question # 8

The nature of positive rays depend on:

Question # 9

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

Question # 10

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

Question # 11

What is the packet of energy called?

Question # 12

The quantum number which determines the shape of the orbital is

Question # 13

If the value of principal quantum number is 3. the total possible values for magnetic quantum number will be

Question # 14

Energy of electron in first orbit of H atom is

Question # 15

The energy of the first electron is helium will be

Question # 16

Cathode rays drive a small paddle wheel placed in their path. This observation shows that

Question # 17

Consider the ground state of Cr atom (Z=24). The numbers of electrons with the azimuthal quantum numbers l = 1 and l = 2 are respectively

Question # 18

The wave length of electron as wave is 0.5 nm. What is the wave length in meter

Question # 19

The configuration 1s22s22p53s1shows

Question # 20

Energy of electron in the infinite Bohr orbit of H-atom is

Question # 21

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

Question # 22

Mass of simple electron is:

Question # 23

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

Question # 24

Which of the following is not charged particle

Question # 25

Which is not true with respect to cathode rays?

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

The quantum number which describe the orientation of the orbitals is

Question # 30

Rutherford's atomic model suggests the existence of

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ECAT Chemistry Chapter 5 Important MCQ's

Sr.# Question Answer
1 Which of the following is not isoelectronic?
A. Na+
B. Mg2+
C. O2-
D. Cl-
2 The quantum number which determines the shape of the orbital is
A. principal
B. azimuthal
C. magnetic
D. spin
3 Cathode rays emitted from cathode are
A. Canal rays
B. Protons
C. Electrons
D. Positrons
4 Neutrons was discovered by
A. Mosely
B. Milliken
C. Chadwick
D. Ruherford
5 Positive particle in discharged tube is produced by ionization of gas molecules, which is caused by
A. Gas molecules collide with anode
B. Gas molecules are at high temperature
C. Gas molecules produce X-rays
D. Cathode rays remove electrons from gas molecules
6 In the ground state, an element has 13 electrons in its M shell. The element is
A. Copper
B. Chromium
C. Nickel
D. Iron
7 When 6d orbital is complete, the entering electron goes into:
A. 7f.
B. 7s.
C. 7p.
D. 7d.
8 The number of electrons in the M shell of the element with atomic number 24 is
A. 24
B. 12
C. 13
D. 8
9 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< ....
10 Which of the atoms has 1s2, 2s2, 2px22p1y2p1zconfiguration
A. Nitrogen
B. Carbon
C. Fluorine
D. Oxygen

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