Structure of Atom Test

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Structure of Atom Test - 66

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Weekly Quiz Competition

Question 1
1 / -0

An element in +3 oxidation state has the electronic configuration $$ (Ar)3d^3 $$, Its atomic number is

A
24

B
23

C
22

D
21

Solution

If element in +3 oxidation state has its configuration as $$ (Ar)3d^3 $$. Then in ground state, its electronic configuration will be $$ (Ar)3d^44s^2 $$.
Hence, the atomic no. is 24.
Hence, Option "B" is the correct answer.
Question 2
1 / -0

The elements with a atomic number 26 is

A
A non-metal

B
Krypton

C
Iron

D
Manganese

Solution

Atomic No. 26 is of Iron and it is a metal.
Hence, Option "C" is the correct answer.
Question 3
1 / -0

All those elements belong to f- block whose atomic number are

A
58 to 71

B
90 to 103

C
Both (A) and (B)

D
None

Solution

58 to 71 -- Lanthanides series

90 to 103 -- Actinides series.

Both the series belongs to f - block.
Question 4
1 / -0

Those elements whose two outermost orbitals are incompletely filled with electrons are

A
p - block elements

B
s - block elements

C
transitional elements

D
Both s and p - block elements

Solution

Those elements whose two outermost orbitals are incompletely filled with electrons are p - block elements.
Hence, Option "A" is the correct answer.
Question 5
1 / -0

Which of the following in figure do not represent Bohr’s model of an atom correctly?

A
(i) and (ii)

B
(ii) and (iii)

C
(ii) and (iv)

D
(i) and (iv)

Solution

According to Bohr's Model, the first shell cannot have more than 2 electrons and the second shell cannot have more than 8 electrons.
Hence correct option is (C).
Question 6
1 / -0

Tick the appropriate answer.
Which one of the following scientists put forward the theory regarding the extra-nuclear structure of the atom ?

A
James Chadwick

B
John Dalton

C
Rutherford

D
Niels Bohr

Solution

Niels Bohr of the following scientists put forward the theory regarding the extra-nuclear structure of the atom.
Question 7
1 / -0

To explain his theory, Bohr-used

A
Conservation of linear momentum

B
Conservation of angular momentum

C
Conservation of quantum frequency

D
Conservation of energy

Solution

Bohr postulated that the angular momentum pf the electron is conserved.
Question 8
1 / -0

In Bohr's model of hydrogen atom, which of the following pairs of quantities are quantized

A
Energy and linear momentum

B
Linear and angular momentum

C
Energy and angular momentum

D
None of these

Solution
Question 9
1 / -0

Which of the following is quantised according to Bohr's theory of hydrogen atom

A
Linear momentum of electron

B
Angular momentum of electron

C
Linear velocity of electron

D
Angular velocity of electron

Solution
Question 10
1 / -0

The total number of atoms per unit cell in bcc is:

A
3

B
1

C
4

D
2

Solution

In $$BCC$$, there is one atom at the centre and one - eight fraction of atom at every corner.
So, $$1 + \dfrac{1}{8} \times 8 = 2 $$ atom.

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Re-Attempt Weekly Quiz Competition

Structure of Atom Test - 66

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Structure of Atom Test - 66

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Question 1

24

23

22

21

Solution

Question 2

A non-metal

Krypton

Iron

Manganese

Solution

Question 3

58 to 71

90 to 103

Both (A) and (B)

None

Solution

Question 4

p - block elements

s - block elements

transitional elements

Both s and p - block elements

Solution

Question 5

(i) and (ii)

(ii) and (iii)

(ii) and (iv)

(i) and (iv)

Solution

Question 6

James Chadwick

John Dalton

Rutherford

Niels Bohr

Solution

Question 7

Conservation of linear momentum

Conservation of angular momentum

Conservation of quantum frequency

Conservation of energy

Solution

Question 8

Energy and linear momentum

Linear and angular momentum

Energy and angular momentum

None of these

Solution

Question 9

Linear momentum of electron

Angular momentum of electron

Linear velocity of electron

Angular velocity of electron

Solution

Question 10

3

1

4

2

Solution

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