NEET Questions - Chemistry - Structure of Atom

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Physics Chemistry Botany Zoology

Question bank:

In photoelectric effect, the kinetic energy of photoelectrons increases linearly with the

Wavelength of incident light
Frequency of incident light
Velocity of incident light
Atomic mass of an element

Slope of $V_{0}$ vs v curve is (where $V_{0}$ =stopping potential, v=subjected frequency)

e

\frac{h}{e}

ϕ

h

The photoelectric emission from a surface starts only when the light incident upon the surface has certain minimum:

intensity
wavelength
frequency
velocity

If $λ_{0}$ and $λ$ be the threshold wavelength and the wavelength of incident light, the velocity of photo-electrons ejected from the metal surface is:

\sqrt{\frac{2 h}{m} (λ_{0} - λ)}

\sqrt{\frac{2 hc}{m} (λ_{0} - λ)}

\sqrt{\frac{2 hc}{m} (\frac{λ_{0} - λ}{{λλ}_{0}})}

\sqrt{\frac{2 h}{m} (\frac{1}{λ_{0}} - \frac{1}{λ})}

The ratio of slopes of $K_{\max} vs . v and V_{0} vs . v$ curves in the photoelectric effect gives (v=frequency, $K_{\max}$ =maximum kinetic energy, $V_{0}$ stopping potential):

charge of electron
Planck's constant
work function
the ratio of Planck's constant of electronic charge

Which of the following has the largest de Broglie wavelength (all have equal velocity)

{CO}_{2}

molecule

{NH}_{3}

molecule
Electron
Proton

An excited state of H atom emits a photon of wavelength $λ$ and returns in the ground state, the principal quantum number of excited state is given by:

\sqrt{λR (λR - 1)}

\sqrt{\frac{λR}{(λR - 1)}}

\sqrt{λR (λR + 1)}

\sqrt{\frac{(λR - 1)}{λR}}

A dye absorbs a photon of wavelength $λ$ and re-emits the same energy into two photons of wavelengths $λ_{1}$ and $λ_{2}$ respectively. The wavelength $λ$ is related with $λ_{1}$ and $λ_{2}$ as:

λ = \frac{λ_{1} + λ_{2}}{λ_{1} λ_{2}}

λ = \frac{λ_{1} λ_{2}}{λ_{1} + λ_{2}}

λ = \frac{λ_{1}^{2} + λ_{2}^{2}}{λ_{1} + λ_{2}}

λ = \frac{λ_{1} λ_{2}}{{(λ_{1} + λ_{2})}^{2}}

NEET Chemistry Questions: Structure of Atom

Question bank:

In photoelectric effect, the kinetic energy of photoelectrons increases linearly with the

Slope of V0 vs v curve is (where V0=stopping potential, v=subjected frequency)

The photoelectric emission from a surface starts only when the light incident upon the surface has certain minimum:

If λ0 and λ be the threshold wavelength and the wavelength of incident light, the velocity of photo-electrons ejected from the metal surface is:

The ratio of slopes of Kmax vs. v and V0 vs. v curves in the photoelectric effect gives (v=frequency, Kmax=maximum kinetic energy, V0 stopping potential):