Structure of Atom Test

Question 1
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Orbital angular momentum depends on..........

A
l

B
n and l

C
n and m

D
m and s

Question 2
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In which of the following pairs, the ions are iso-electronic?

(i) \(Na ^+ , Mg ^{2+}\)

(ii) \(Al ^{3+} , O ^-\)

(iii) \(Na ^+ , O ^{2-}\)

(iv) \(N ^{3-} , Cl^-\)

A
(i),(iii)

B
(i),(iv)

C
(ii),(iii)

D
(iii),(iv)

Question 3

1 / -0

Match the items given in Column I with the items given in Column II:

	Column I		Column II
(i)	Photon	(a)	Value is 4 for N shell
(ii)	Electron	(b)	Probability density
(iii)	\(\psi^2\)	(c)	Always positive value
(iv)	Principal quantum number n	(d)	Exhibits both momentum and wavelength

(i) → (d) (ii) → (d) (iii) → (a), (c) (iv) → (a), (b)

(i) → (a) (ii) → (d) (iii) → (b), (c) (iv) → (a), (c)

(i) → (d) (ii) → (d) (iii) → (b), (c) (iv) → (a), (c)

(i) → (b) (ii) → (d) (iii) → (b), (c) (iv) → (a), (c)

Question 4
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In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.

Assertion (A): It is impossible to determine the exact position and exact momentum of an electron simultaneously.

Reason (R): The path of an electron in an atom is clearly defined.

A
Both A and R are true and R is the correct explanation of A

B
Both A and R are true and R is not the correct explanation of A

C
A is true and R is false

D
Both A and R are false

Question 5
1 / -0

Chlorine exists in two isotopic forms, Cl-37 and Cl-35 but its atomic mass is 35.5. This indicates the ratio of Cl-37 and Cl-35 is approximately

A
1:2

B
1:1

C
1:3

D
3:1

Question 6
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The pair of ions having same electronic configuration is.......

A
\(Cr^{3+}, Fe^{3+}\)

B
\(Fe^{3+}, Mn^{2+}\)

C
\(Fe^{3+}, Co^{3+}\)

D
\(Sc^{3+}, Cr^{3+}\)

Question 7
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Which of the following statements concerning the quantum numbers are correct?

(i) Angular quantum number determines the three-dimensional shape of the orbital.

(ii) The principal quantum number determines the orientation and energy of the orbital.

(iii) Magnetic quantum number determines the size of the orbital.

(iv) Spin quantum number of an electron determines the orientation of the spin of electron relative to the chosen axis.

A
(i),(iv)

B
(iii),(iv)

C
(ii),(iii)

D
(i),(ii)

Question 8
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For the electrons of oxygen atom, which of the following statements is correct?

A
\(Z_{eff}\) for an electron in a 2s orbital is the same as \(Z_{eff}\) for an electron in a 2p orbital

B
An electron in the 2s orbital has the same energy as an electron in the 2p orbital

C
\(Z_{eff}\) for an electron in 1s orbital is the same as \(Z_{eff}\) for an electron in a 2s orbital

D
The two electrons present in the 2s orbital have spin quantum numbers \(m_s\) but of opposite sign

Question 9

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Match species given in Column I with the electronic configuration given in Column II.

	Column I		Column II
(i)	\(Cr\)	(a)	\([Ar]3d^84s^0\)
(ii)	\(Fe^{2+}\)	(b)	\([Ar]3d^{10}4s^1\)
(iii)	\(Ni^{2+}\)	(c)	\([Ar]3d^64s^0\)
(iv)	\(Cu\)	(d)	\([Ar]3d^54s^1\)
		(e)	\([Ar]3d^64s^2\)

(i) → (d) (ii) → (c) (iii) → (a) (iv) → (b)

(i) → (d) (ii) → (b) (iii) → (a) (iv) → (e)

(i) → (c) (ii) → (d) (iii) → (a) (iv) → (b)

(i) → (d) (ii) → (a) (iii) → (b) (iv) → (e)

Question 10
1 / -0

If travelling at same speeds, which of the following matter waves have the shortest wavelength?

A
Electron

B
Alpha particle \((He ^{2+} )\)

C
Neutron

D
Proton

Submit Test

Structure of At...

Question 1

l

n and l

n and m

m and s

Question 2

(i),(iii)

(i),(iv)

(ii),(iii)

(iii),(iv)

Question 3

(i) → (d) (ii) → (d) (iii) → (a), (c) (iv) → (a), (b)

(i) → (a) (ii) → (d) (iii) → (b), (c) (iv) → (a), (c)

(i) → (d) (ii) → (d) (iii) → (b), (c) (iv) → (a), (c)

(i) → (b) (ii) → (d) (iii) → (b), (c) (iv) → (a), (c)

Question 4

Both A and R are true and R is the correct explanation of A

Both A and R are true and R is not the correct explanation of A

A is true and R is false

Both A and R are false

Question 5

1:2

1:1

1:3

3:1

Question 6

\(Cr^{3+}, Fe^{3+}\)

\(Fe^{3+}, Mn^{2+}\)

\(Fe^{3+}, Co^{3+}\)

\(Sc^{3+}, Cr^{3+}\)

Question 7

(i),(iv)

(iii),(iv)

(ii),(iii)

(i),(ii)

Question 8

\(Z_{eff}\) for an electron in a 2s orbital is the same as \(Z_{eff}\) for an electron in a 2p orbital

An electron in the 2s orbital has the same energy as an electron in the 2p orbital

\(Z_{eff}\) for an electron in 1s orbital is the same as \(Z_{eff}\) for an electron in a 2s orbital

The two electrons present in the 2s orbital have spin quantum numbers \(m_s\) but of opposite sign

Question 9

(i) → (d) (ii) → (c) (iii) → (a) (iv) → (b)

(i) → (d) (ii) → (b) (iii) → (a) (iv) → (e)

(i) → (c) (ii) → (d) (iii) → (a) (iv) → (b)

(i) → (d) (ii) → (a) (iii) → (b) (iv) → (e)

Question 10

Electron

Alpha particle \((He ^{2+} )\)

Neutron

Proton

User

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