EASY

JEE Main

IMPORTANT

Earn 100

Moseley's equation for the determination of wavelength of $X$ -rays is ( $ν =$ frequency of wave, $Z =$ nuclear charge, $a$ and $b$ are constants)

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Important Questions on Atomic Structure

MEDIUM

JEE Main

IMPORTANT

Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 3 - Atomic Structure>DPP 3.1>Q 11

Light of wavelength

λ

, shines on a metal surface with intensity

X

, and the metal emits

Y

electrons per second of average energy

Z

. What will happen to

Y

and

Z

X

is doubled?

HARD

JEE Main

IMPORTANT

Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 3 - Atomic Structure>DPP 3.1>Q 12

Number of

α

-particles scattered by an angle

θ

in Rutherford's experiment is

MEDIUM

JEE Main

IMPORTANT

Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 3 - Atomic Structure>DPP 3.1>Q 13

The ejection of the photoelectron from the silver metal in the photoelectric effect experiment can be stopped by applying a voltage of

0.35 V

when the radiation

256.7 nm

is used. Calculate the work function for silver metal.

MEDIUM

JEE Main

IMPORTANT

Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 3 - Atomic Structure>DPP 3.1>Q 14

The approximate radius of a

H

atom is

0.05 nm

, and that of the proton is

1.5 \times 10^{- 15} m

. Assuming both the hydrogen atom and the proton to be spherical, calculate the fraction of the space in an atom of hydrogen that is occupied by the nucleus.

MEDIUM

JEE Main

IMPORTANT

Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 3 - Atomic Structure>DPP 3.1>Q 15

One quantum is absorbed per gaseous molecule of

{Br}_{2}

for converting into

Br

atoms. If light absorbed has a wavelength

5000 \overset{\circ}{A},

calculate the energy required to break bonds in

kJ {mol}^{- 1} .

HARD

JEE Main

IMPORTANT

Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 3 - Atomic Structure>DPP 3.1>Q 16

In Rutherford's gold foil experiment, the scattering of

α

-particles takes place. In this process:

MEDIUM

JEE Main

IMPORTANT

Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 3 - Atomic Structure>DPP 3.1>Q 17

When a high-speed electron strikes a metal surface, which of the following can happen?

MEDIUM

JEE Main

IMPORTANT

Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 3 - Atomic Structure>DPP 3.1>Q 18

Which of the following properties does a cathode ray possess?

Moseley's equation for the determination of wavelength of X-rays is (ν= frequency of wave, Z= nuclear charge, a and b are constants)

Important Questions on Atomic Structure

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Moseley's equation for the determination of wavelength of $X$ -rays is ( $ν =$ frequency of wave, $Z =$ nuclear charge, $a$ and $b$ are constants)