JEE-ADVANCED SERIES Physics
Atoms
4 previous year questions.
Volume: 4 Ques
Yield: Medium
High-Yield Trend
1
2019 2
2007 1
2005 Chapter Questions 4 MCQs
01
PYQ 2005
easy
physics ID: jee-adva
A photon collides with a stationary hydrogen atom in the ground state inelastically. The energy of the colliding photon is 10.2 eV. After a time interval of the order of microseconds, another photon collides with the same hydrogen atom inelastically with an energy of 15 eV. What will be observed by the detector?
1
2 photons of energy 10.2 eV
2
2 photons of energy 1.4 eV
3
One photon of energy 10.2 eV and an electron of energy 1.4 eV
4
One photon of energy 10.2 eV and another photon of energy 1.4 eV
02
PYQ 2007
medium
physics ID: jee-adva
The largest wavelength in the ultraviolet region of the hydrogen spectrum is . The smallest wavelength in the infrared region of the hydrogen spectrum (to the nearest integer) is
1
2
3
4
03
PYQ 2007
medium
physics ID: jee-adva
Electrons with de-Broglie wavelength fall on the target in an tube. The cut-off wavelength of the emitted is
1
2
3
4
04
PYQ 2019
medium
physics ID: jee-adva
A free hydrogen atom after absorbing a photon of wavelength gets excited from the state n = 1 to the state n = 4. Immediately after that the electron jumps to n = m state by emitting a photon of wavelength Let the change in momentum of atom due to the absorption and the emission are ?p and ?p , respectively. If . Which of the option(s) is/are correct ? [Use hc = 1242 eV nm; 1 nm = 10 m, h and c are Planck's constant and speed of light, respectively]
1
= 418 nm
2
The ratio of kinetic energy of the electron in the state n = m to the state n = 1 is
3
m = 2
4