Atomic Structure PYQs - Last 10 Years

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Practice 94 MHT CET Chemistry questions from Atomic Structure. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.

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Last 10 Years Atomic Structure Questions

Showing 50 of 94 filtered questions.

1Atomic Structure

Identify pair of orbitals having similar $(n + l)$ values from the following.

2Atomic Structure

What is the wave number of lowest transition associated with Paschen series?

3Atomic Structure

Calculate the shortest wavelength in hydrogen spectrum emission of Lymen series ($R_H = 109677\,\text{cm}^{-1}$)

4Atomic Structure

Which of the following colours of visible light has lowest energy?

5Atomic Structure

Which from following colours has highest energy if wave lengths of violet, blue, yellow and red light are 410 nm, 470 nm, 580 nm and 750 nm respectively ?

6Atomic Structure

What is uncertainty in velocity of an electron if uncertainty in measurement of position is 50 pm ? $(m_e = 9.1 \times 10^{-31}\text{kg},\ h = 6.63 \times 10^{-34}\text{Js},\ \pi = 3.142)$

7Atomic Structure

Find the energy of third stationary orbit of Bohr's model of hydrogen atom if the energy of ground state is $-E$ J

8Atomic Structure

What is the energy of an electron in a hydrogen atom in a stationary state corresponding to n = 2 ?

9Atomic Structure

What is the number of unpaired electrons present in ground state of Silicon and Chromium, respectively ?

10Atomic Structure

Calculate the de Broglie wavelength of an electron in the first Bohr orbit of a hydrogen atom if the velocity of an electron in the first orbit is $2.2 \times 10^6 \text{ ms}^{-1}$. [mass of electron $= 9.1 \times 10^{-31}$ kg, plank's cons...

11Atomic Structure

If the velocity of the electron in Bohr's first orbit is $2.19 \times 10^6\ \text{Ms}^{-1}$, Calculate the de Broglie wavelength associated with it.$[h = 6.626 \times 10^{-34}\ \text{J s}$ & Mass of electrons $= 9.10938 \times 10^{-31}$ kg ...

12Atomic Structure

Which of the following pairs represents isobars?

13Atomic Structure

If the energy of an electron in the first Bohr orbit of the H-atom is $-2.18 \times 10^{-18}$ J then the energy of the electron in the second orbit will be

14Atomic Structure

Match List I with List IIList IElementList IINumber of Neutron(A). ${}^{24}_{12}Mg$(I). $5$(B). ${}^{27}_{13}Al$(II). $12$(C). ${}^{9}_{4}Be$(III). $6$(D). ${}^{12}_{6}C$(IV). $14$Choose the correct answer from the options given below:

15Atomic Structure

What are the total number of electrons present in s and p orbitals respectively in the argon?

16Atomic Structure

Calculate the frequency in Hz of orange colour light having wavelength 600 nm .
\(\left[\mathrm{C}=3 \times 10^8 \mathrm{~ms}^{-1}\right]\)

17Atomic Structure

"It is impossible to determine simultaneously the exact position and exact momentum of an electron." This statement is called

18Atomic Structure

"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

19Atomic Structure

Which from following d-orbitals has different shape as compared with others?

20Atomic Structure

Which of the following elements contains maximum number of unpaired electrons?

21Atomic Structure

What is the numerical value of angular momentum for an electron in first orbit of hydrogen atom? ( $\mathrm{h}=6.626 \times 10^{-34} \mathrm{Js}$ )

22Atomic Structure

\(\text { What is the number of node in } 2 \mathrm{~s} \text { orbital? }\)

23Atomic Structure

Which from following is NOT hydrogen like species?

24Atomic Structure

Calculate the energy per mole of photon of electromagnetic radiation having wavelength $700 \mathrm{~nm}\left[\mathrm{~h}=6.626 \times 10^{-34} \mathrm{Js}, \mathrm{c}=3 \times 10^8 \mathrm{~m} / \mathrm{s}\right]$

25Atomic Structure

Which from following statements is NOT true about isotopes?

26Atomic Structure

Calculate the energy associated with third orbit of $\mathrm{He}^{+}$.

27Atomic Structure

"No two electrons in an atom can have the identical set of four quantum numbers." The statement is known as

28Atomic Structure

Calculate the longest wavelength in hydrogen emission spectrum of Lyman series.
\(\left(\mathrm{R}_{\mathrm{H}}=109677 \mathrm{~cm}^{-1}\right)\)

29Atomic Structure

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? $\left[\mathrm{R}_{\mathrm{H}}=109677 \mathrm{~cm}^{-1}\right]$

30Atomic Structure

Which of the following rules states that it is impossible to determine simultaneously the exact position and exact momentum of an electron?

31Atomic Structure

Which from following pairs is an example of isotones?

32Atomic Structure

Which parameter is indicated by the number of waves passing through a given point in one second?

33Atomic Structure

Calculate wave length for emission of a photon having wave number $11516 \mathrm{~cm}^{-1}$.

34Atomic Structure

Which of the following statements is correct regarding isobars?

35Atomic Structure

Identify the orbital having lowest energy from following.

36Atomic Structure

Calculate radius of fourth orbit of $\mathrm{B}^{4+}$ ion.

37Atomic Structure

What is the representation of an element having mass number of 40 and 21 neutrons in it?

38Atomic Structure

What is the amount of energy associated with first orbit of monopositive helium ion? $\left[\mathrm{R}_{\mathrm{H}}=2.18 \times 10^{-18} \mathrm{~J}\right]$

39Atomic Structure

What is the energy associated with first orbit of $\mathrm{He}^{+}$?

40Atomic Structure

What is the wave number of lowest transition in Balmer series?

41Atomic Structure

Which from following species does not have number of electrons similar to other three species?

42Atomic Structure

What is energy associated with fourth orbit of hydrogen atom?
\(\left(\mathrm{R}_{\mathrm{H}}=2.18 \times 10^{-18} \mathrm{~J}\right)\)

43Atomic Structure

What is momentum of a microscopic particle having de Broglie's wavelength 6.0 A?
\(\left(\mathrm{h}=6.63 \times 10^{-34} \mathrm{Js}\right)\)

44Atomic Structure

Which of the following orbitals have same value of $(\mathrm{n}+l)$ as that of 3 d orbital?

45Atomic Structure

Which of the following species contain 20 electrons?

46Atomic Structure

What is wavenumber of a radiation having wavelength $0.25 \mu \mathrm{~m}$ ?

47Atomic Structure

Which of the following series of emission spectral lines for hydrogen observed in visible region?

48Atomic Structure

What is de Broglie's wavelength for a particle having mass $6.64 \times 10^{-27} \mathrm{~kg}$ moving with velocity of $3 \times 10^3 \mathrm{~ms}^{-1} ?\left[\mathrm{~h}=6.63 \times 10^{-34} \mathrm{Js}\right]$

49Atomic Structure

Calculate the radius of first orbit of $\mathrm{Li}^{++}$.

50Atomic Structure

What is the total number of orbitals present in N shell?