EASY

JEE Main

IMPORTANT

Earn 100

The graph which depicts the results of Rutherford gold foil experiment with $α$ -particles is:
$θ :$ Scattering angle
$Y :$ Number of scattered $α$ -particles detected
(Plots are schematic and not to scale)

61.54% studentsanswered this correctly

Important Questions on Atoms and Nuclei

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 21 - Atoms and Nuclei>JEE Main - 8th January 2020 Shift 2>Q 52

The first member of the Balmer series of hydrogen atom has a wavelength of

6561 \overset{\circ}{A}

. The wavelength of the second member of the Balmer series (in nm) is_____________

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 21 - Atoms and Nuclei>JEE Main - 9th January 2020 Shift 2>Q 53

The energy required to ionise a hydrogen like ion in its ground state is

9

Rydbergs. What is the wavelength of the radiation emitted when the electron in this ion jumps from the second excited state to the ground state?

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 21 - Atoms and Nuclei>JEE Main - 9th April 2019 Shift 1>Q 54

Taking the wavelength of first Balmer line in hydrogen spectrum

(n = 3

n = 2)

660 n m

, the wavelength of the

2^{n d}

Balmer line

(n = 4

n = 2)

will be :

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 21 - Atoms and Nuclei>JEE Main - 9th April 2019 Shift 2>Q 55

H e^{+}

ion is in its first excited state. Its ionization energy is:

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 21 - Atoms and Nuclei>JEE Main - 9th January 2019 Shift 1>Q 56

A sample of radioactive material

A

, that has an activity of

10 mCi (1 Ci = 3.7 \times 10^{10} d e c a y s^{- 1})

has twice the number of nuclei as another sample of a different radioactive material

B

which has an activity of

20 mCi

. The correct choices for half-lives of

A

and

B

would then be, respectively:

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 21 - Atoms and Nuclei>JEE Main - 9th January 2019 Shift 2>Q 57

At a given instant, say

t = 0,

two radioactive substance

A

and

B

have equal activities. The ratio

\frac{R_{B}}{R_{A}}

of their activities after time

t

itself decays with time

t

e^{- 3 t} .

If the half-life of

A

l n 2,

the half-life of

B

is:

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 21 - Atoms and Nuclei>JEE Main - 8th April 2019 Shift 1>Q 58

Radiation coming from transitions

n = 2

n = 1

of hydrogen atoms fall on

{H e}^{+}

ions in

n = 1

and

n = 2

states. The possible transition of helium ions as they absorb energy from the radiation is:

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 21 - Atoms and Nuclei>JEE Main - 8th April 2019 Shift 2>Q 59

The ratio of mass densities of nuclei of

^{40} C a

and

^{16} O

is close to:

The graph which depicts the results of Rutherford gold foil experiment with α -particles is: θ: Scattering angle Y: Number of scattered α -particles detected (Plots are schematic and not to scale)

Important Questions on Atoms and Nuclei

Learn and Prepare for any exam you want !

The graph which depicts the results of Rutherford gold foil experiment with $α$ -particles is:
$θ :$ Scattering angle
$Y :$ Number of scattered $α$ -particles detected
(Plots are schematic and not to scale)