MEDIUM
JEE Main
IMPORTANT
Earn 100

Select the correct statements for hydrogen like atoms or ions.

50% studentsanswered this correctly

Important Questions on Atomic Structure

HARD
JEE Main
IMPORTANT
Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 3 - Atomic Structure>DPP 3.2>Q 20
An electron in a hydrogen atom makes a transition from n=n1 to n=n2. The time period of the electron in the initial state is eight times that in the final state. What are the possible values of n1 and n2?
MEDIUM
JEE Main
IMPORTANT
Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 3 - Atomic Structure>DPP 3.2>Q 21
Identify the correct statement(s) from the following:
HARD
JEE Main
IMPORTANT
Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 3 - Atomic Structure>DPP 3.2>Q 22
A hydrogen-like atom has ground state binding energy 122.4 eV. Then:
MEDIUM
JEE Main
IMPORTANT
Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 3 - Atomic Structure>DPP 3.3>Q 1
What is the ratio of the velocities of CH4 and O2 molecules so that they are associated with de-Broglie waves of equal wavelength? C=12 u, H=1 u, O= 16 u
MEDIUM
JEE Main
IMPORTANT
Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 3 - Atomic Structure>DPP 3.3>Q 2
A golf ball has a mass of 40 g and a speed of 45 ms-1. If the speed can be measured with an accuracy of 2%, calculate the uncertainty in the position.
HARD
JEE Main
IMPORTANT
Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 3 - Atomic Structure>DPP 3.3>Q 3
If the uncertainty in the position of a moving electron is equal to its de-Broglie wavelength, then the minimum percentage error in measurement of velocity will be approximately 8%. Explain.
HARD
JEE Main
IMPORTANT
Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 3 - Atomic Structure>DPP 3.3>Q 4
An electron, which is practically at rest, is initially accelerated through a potential difference of 100 volts. It then has a de Broglie wavelength =λ1 Å. It then gets retarded through 19 volts and then has a wavelength λ2 Å. Further retardation through 32 volts changes the wavelength to λ3 Å. What is λ3-λ2λ1?
HARD
JEE Main
IMPORTANT
Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 3 - Atomic Structure>DPP 3.3>Q 5
A photon of 19.6 eV energy strikes a H atom (in its ground state). Find the de Broglie wavelength of the electron ejected from the H atom (in Å).