Atomic Structure · Chemistry · MHT CET
MCQ (Single Correct Answer)
$[h = 6.626 \times 10^{-34}\ \text{J s}$ & Mass of electrons $= 9.10938 \times 10^{-31}$ kg $]$
Calculate the frequency in Hz of orange colour light having wavelength 600 nm .
$$ \left[\mathrm{C}=3 \times 10^8 \mathrm{~ms}^{-1}\right] $$
"Pairing of electrons in the orbitals belonging to the same subshell does not occur unless each orbital belonging to that subshell has got one electron each." This statement is known as
"It is impossible to determine simultaneously the exact position and exact momentum of an electron." This statement is called
Which of the following elements contains maximum number of unpaired electrons?
Which from following d-orbitals has different shape as compared with others?
$$ \text { What is the number of node in } 2 \mathrm{~s} \text { orbital? } $$
What is the numerical value of angular momentum for an electron in first orbit of hydrogen atom? ( $\mathrm{h}=6.626 \times 10^{-34} \mathrm{Js}$ )
Which from following is NOT hydrogen like species?
Which from following statements is NOT true about isotopes?
Calculate the energy per mole of photon of electromagnetic radiation having wavelength $700 \mathrm{~nm}\left[\mathrm{~h}=6.626 \times 10^{-34} \mathrm{Js}, \mathrm{c}=3 \times 10^8 \mathrm{~m} / \mathrm{s}\right]$
"No two electrons in an atom can have the identical set of four quantum numbers." The statement is known as
Calculate the energy associated with third orbit of $\mathrm{He}^{+}$.
What is the wavenumber of the photon emitted during transition from the orbit $\mathrm{n}=5$ to that of $\mathrm{n}=2$ in hydrogen atom? $\left[\mathrm{R}_{\mathrm{H}}=109677 \mathrm{~cm}^{-1}\right]$
What is de Broglie's wavelength for a particle having mass $6.64 \times 10^{-27} \mathrm{~kg}$ moving with velocity of $3 \times 10^3 \mathrm{~ms}^{-1} ?\left[\mathrm{~h}=6.63 \times 10^{-34} \mathrm{Js}\right]$
Which of the following series of emission spectral lines for hydrogen observed in visible region?
What is wavenumber of a radiation having wavelength $0.25 \mu \mathrm{~m}$ ?
Which of the following species contain 20 electrons?
Calculate the radius of first orbit of He$^+$.
What is the designation of an orbital with quantum numbers $\mathrm{n}=4$ and $l=3$?
Find the number of electrons that generate 1 coulomb charge?
Calculate the radius of first orbit of $\mathrm{Li}^{++}$.
What is the total number of orbitals present in N shell?
Which from following statements is NOT correct regarding Bohr model?
Identify the orbital having highest energy from following:
Which of the following equations gives angular momentum of an electron in a stationary orbit?
What is the wave number of lowest transition associated with Lyman series?
Which of the following orbitals is represented by $\mathrm{n}=3$ and $l=2$ ?
What is the frequency of violet light having wavelength 400 nm ?
Which of the following is radius of first orbit of He$^+$ ?
Which parameter is indicated by the number of waves passing through a given point in one second?
Which of the following rules states that it is impossible to determine simultaneously the exact position and exact momentum of an electron?
Which from following pairs is an example of isotones?
Identify the orbital having lowest energy from following.
Calculate radius of fourth orbit of $\mathrm{B}^{4+}$ ion.
Calculate wave length for emission of a photon having wave number $11516 \mathrm{~cm}^{-1}$.
Which of the following statements is correct regarding isobars?
What is the energy associated with first orbit of $\mathrm{He}^{+}$?
What is the wave number of lowest transition in Balmer series?
What is the amount of energy associated with first orbit of monopositive helium ion? $\left[\mathrm{R}_{\mathrm{H}}=2.18 \times 10^{-18} \mathrm{~J}\right]$
What is the representation of an element having mass number of 40 and 21 neutrons in it?
Which of the following orbitals have same value of $(\mathrm{n}+l)$ as that of 3 d orbital?
What is momentum of a microscopic particle having de Broglie's wavelength 6.0 A?
$$\left(\mathrm{h}=6.63 \times 10^{-34} \mathrm{Js}\right)$$
What is energy associated with fourth orbit of hydrogen atom?
$$\left(\mathrm{R}_{\mathrm{H}}=2.18 \times 10^{-18} \mathrm{~J}\right)$$
Which from following species does not have number of electrons similar to other three species?
Calculate the frequency if wavelength is $$750 \mathrm{~nm}$$.
Find the number of orbitals and maximum electrons respectively present in $$\mathrm{M}$$-shell?
Calculate radius of third orbit of $$\mathrm{He}^{+}$$.
Which of the following electromagnetic radiations possesses lowest energy?
Calculate the wave number of photon emitted during transition from the orbit of $$n=3$$ to $$n=2$$ in hydrogen atom $$\left(R_H=109677 \mathrm{~cm}^{-1}\right)$$.
Find the radius of fourth orbit of hydrogen atom if its radius of first orbit is $$\mathrm{R}$$ pm.
Which from following coloured light has the highest energy?
What is the radius of the fourth orbit of hydrogen atom?
Calculate the frequency of blue light having wavelength $$440 \mathrm{~nm}$$.
Which of following pairs is an example of isoelectronic species?
Which of the following statements is NOT true about Bohr atomic model?
Which from following elements is isoelectronic with $$\mathrm{Na}^{+}$$?
Which from following equations is used to express the angular momentum of an electron in a stationary state?
Which emission transition series is obtained when electron jumps from $$\mathrm{n}_2=\infty$$ to $$\mathrm{n}_1=1$$ ?
What is the radius of fourth orbit of $$\mathrm{Be}^{+++}$$ ?
What is angular momentum of an electron in fourth orbit of hydrogen atom?
Which of the following species is NOT isoelectronic with neon?
Identify the physical quantity that is measured in Candela.
Identify degenerate orbitals from following for hydrogen atom.
Which of the following statements is NOT true about Rutherford atomic model?
What is the wave number of photon emitted during transition from orbit, $$\mathrm{n}=4$$ to $$\mathrm{n}=2$$ in hydrogen atom $$\left[R_H=109677 \mathrm{~cm}^{-1}\right]$$
Which from following rule / principle states that "No two electrons in an atom can have the same set of four quantum numbers"?
Calculate the wavenumber of the photon emitted during transition from the orbit of $$n=2$$ to $$n=1$$ in hydrogen atom. $$\left[R_H=109677 \mathrm{~cm}^{-1}\right]$$
What is maximum number of electrons accommodated in a subshell having azimuthal quantum number, $$\ell$$ = 2 ?
How many values of magnetic quantum number are possible for each value of azimuthal quantum number?
What is the frequency of yellow light having wavelength $$580 \mathrm{~nm}$$ ?
Two electrons occupying the same orbital are distinguished by
What is the energy of an electron in stationary state corresponding to $$\mathrm{n}=2$$ ?
The wavelength of blue light is $$480 \mathrm{~nm}$$. What is frequency of this light?
What is the wavelength for a wave having frequency 50 Hz?
The wavelength of a spectral line of caesium is $$460 \mathrm{~nm}$$. What is the frequency of spectral line?
What is the value of frequency of radiation when transition occurs between two stationary states that differ in energy by $$\Delta \mathrm{E}$$ ?
Identify an orbital with the quantum numbers n = 4, $$l$$ = 3, m = 0.
Identify the symbol used for water according to Dalton's atomic theory?