Choices for the correct combination of elements from List-I and List-II are given as (a), (b), (c), and (d) out of which one is correct. List I List II (P) Photon (1) Value is 4 for N shell (Q) Electron (2) Probability density (R) ψ 2 (3) Always exhibits positive value (S) n (4) momentum and wavelength both

P → 4 ; Q → 4 ; R → 2 , 3 ; S → 1 , 3

P → 1 , 2 ; Q → 3 ; R → 4 ; S → 2

P → 4 ; Q → 2 ; R → 3 ; S → 1

P → 4 ; Q → 2 , 3 ; R → 1 ; S → 2

Choices for the correct combination of elements from List-I and List-II are given as (a), (b), (c), and (d) out of which one is correct. List - I List - II (P) Light has dual character. (1) de-Broglie's theory (Q) Electrons have dual character. (2) Einstein theory (R) N has electronic configuration 1 s 2 2 s 2 2 p x 1 2 p y 1 2 p z 1 not 1 s 2 2 s 2 2 p x 2 2 p y 1 . (3) Aufbau principle (S) 4 s orbital filled before 3 d . (4) Hund's rule

P → 2 , Q → 1 , R → 4 , S → 3

P → 1 , Q → 2 , R → 4 , S → 3

P → 2 , Q → 4 , R → 3 , S → 1

P → 3 , Q → 4 , R → 2 , S → 1

Choices for the correct combination of elements from List-I and List-II are given as (a), (b), (c), and (d) out of which one is correct. List - I List - II (P) Radius of n th orbit (1) inversely proportional to Z (Q) Energy of n th orbit (2) integral multiple of h 2 π (R) Angular momentum of electron (3) inversely proportional to n 2 (S) Velocity of electron in n th orbit (4) inversely proportional to n

P → 1 , Q → 2 , R → 2 , S → 4

P → 2 , Q → 4 , R → 2 , S → 1

P → 4 , Q → 2 , R → 3 , S → 1

P → 3 , Q → 4 , R → 2 , S → 1

EXERCISE

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EASY

10th CBSE

IMPORTANT

Foundation Course Chemistry>Chapter 7 - Atomic Structure>EXERCISE>Q 47

$ψ$ represents

EASY

10th CBSE

IMPORTANT

Foundation Course Chemistry>Chapter 7 - Atomic Structure>EXERCISE>Q 48

The uncertainty involved in the measurement of velocity of electron with a distance of $0.1 Å$ is

EASY

10th CBSE

IMPORTANT

Foundation Course Chemistry>Chapter 7 - Atomic Structure>EXERCISE>Q 49

The de-Broglie wavelength associated with a ball of mass $1 kg$ having kinetic energy $0.5 J$ is

EASY

10th CBSE

IMPORTANT

Foundation Course Chemistry>Chapter 7 - Atomic Structure>EXERCISE>Q 50

The probability of finding an electron in a $P_{x}$ orbital is zero

EASY

10th CBSE

IMPORTANT

Foundation Course Chemistry>Chapter 7 - Atomic Structure>EXERCISE>Q 2

Choices for the correct combination of elements from List-I and List-II are given as (a), (b), (c), and (d) out of which one is correct.

List I	List II
(P) Photon	(1) Value is $4$ for $N$ shell
(Q) Electron	(2) Probability density
(R) $ψ^{2}$	(3) Always exhibits positive value
(S) $n$	(4) momentum and wavelength both

EASY

10th CBSE

IMPORTANT

Foundation Course Chemistry>Chapter 7 - Atomic Structure>EXERCISE>Q 3

Choices for the correct combination of elements from List-I and List-II are given as (a), (b), (c), and (d) out of which one is correct.

List - I	List - II
(P) Light has dual character.	(1) de-Broglie's theory
(Q) Electrons have dual character.	(2) Einstein theory
(R) $N$ has electronic configuration $1 s^{2} 2 s^{2} 2 {p_{x}}^{1} 2 {p_{y}}^{1} 2 {p_{z}}^{1}$ not $1 s^{2} 2 s^{2} 2 {p_{x}}^{2} 2 {p_{y}}^{1}$ .	(3) Aufbau principle
(S) $4 s$ orbital filled before $3 d$ .	(4) Hund's rule

EASY

10th CBSE

IMPORTANT

Foundation Course Chemistry>Chapter 7 - Atomic Structure>EXERCISE>Q 4

Choices for the correct combination of elements from List-I and List-II are given as (a), (b), (c), and (d) out of which one is correct.

List - I (Orbital)	List - II (Radial nodes)
(P) $3 p$	(1) $0$
(Q) $5 d$	(2) $1$
(R) $4 f$	(3) $2$
(S) $4 s$	(4) $3$

EASY

10th CBSE

IMPORTANT

Foundation Course Chemistry>Chapter 7 - Atomic Structure>EXERCISE>Q 5

Choices for the correct combination of elements from List-I and List-II are given as (a), (b), (c), and (d) out of which one is correct.

List - I	List - II
(P) Radius of $n^{th}$ orbit	(1) inversely proportional to $Z$
(Q) Energy of $n^{th}$ orbit	(2) integral multiple of $\frac{h}{2 π}$
(R) Angular momentum of electron	(3) inversely proportional to $n^{2}$
(S) Velocity of electron in $n^{th}$ orbit	(4) inversely proportional to $n$

EXERCISE

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