Atomic Structure · Chemistry · AP EAPCET

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MCQ (Single Correct Answer)

1

The sum of number of angular nodes and radial nodes for $4 d$-orbital is

AP EAPCET 2024 - 23th May Morning Shift
2

If the position of the electron was measured with an accuracy of +0.002 nm . The uncertainty in the momentum of it would be (in $\mathrm{kg} \mathrm{ms}^{-1}$ )

$$ \left(h=6.626 \times 10^{-34} \mathrm{Js}\right) $$

AP EAPCET 2024 - 23th May Morning Shift
3
The de-Broglie wavelength of an electron with kinetic energy of 2.5 eV is (in m$)\left(1 \mathrm{eV}=1.6 \times 10^{-19} \mathrm{~J}\right.$, $m_e=9 \times 10^{-31} \mathrm{~kg}$ )
AP EAPCET 2024 - 22th May Evening Shift
4
The ratio of ground state energy of $\mathrm{Li}^{2+}, \mathrm{He}^{+}, \mathrm{H}$ is
AP EAPCET 2024 - 22th May Evening Shift
5
If the longest wavelength of spectral line of Paschen series of $\mathrm{Li}^{2+}$ ion spectrum is $x \mathop {\rm{A}}\limits^{\rm{o}}$. Then the longest wavelength (in $\mathop {\rm{A}}\limits^{\rm{o}}$ ) of Lyman series of hydrogen spectrum is
AP EAPCET 2024 - 22th May Morning Shift
6
If $v_0$ is the threshold frequency of a metal $X$, the correct relation between de-Broglie wavelength $(\lambda)$ associated with photoelectron and frequency $(v)$ of the incident radiation is
AP EAPCET 2024 - 22th May Morning Shift
7
The difference in radii between fourth and third Bohr orbit of $\mathrm{He}^{+}($in m$)$ is
AP EAPCET 2024 - 21th May Evening Shift
8
If $\lambda_0$ and $\lambda$ are respectively the threshold wavelength and wavelength of incident light the velocity of photo electrons ejected from the metal surface is
AP EAPCET 2024 - 21th May Evening Shift
9
The energy of third orbit of $\mathrm{Li}^{2+}$ ion (in J ) is
AP EAPCET 2024 - 21th May Morning Shift
10

The number of $d$ electrons in Fe is equal to which of the following?

(i) Total number of ' $s$ ' electrons of Mg .

(ii) Total number of ' $p$ ' electrons of Cl .

(iii) Total number of ' $p$ ' electrons of Ne .

The correct option is

AP EAPCET 2024 - 21th May Morning Shift
11
If uncertainty in position and momentum of an electron are equal, then uncertainty in its velocity is
AP EAPCET 2024 - 20th May Evening Shift
12
The graph between variation of probability density. $\psi^2(r)$ and distance of the electron from the nucleus, $r$ is shown below. This represents

AP EAPCET 2024 - 20th May Evening Shift Chemistry - Atomic Structure Question 11 English

AP EAPCET 2024 - 20th May Evening Shift
13
The angular momentum of an electron in a stationary state of $\mathrm{Li}^{2+}(Z=3)$ is $3 h / \pi$. The radius and energy of that stationary state are respectively
AP EAPCET 2024 - 20th May Morning Shift
14
Identify the pair of elements in which number of electrons in ( $n-1$ ) shell is same
AP EAPCET 2024 - 20th May Morning Shift
15
In the ground state of hydrogen atom, electron absorbs 1.5 times energy than the minimum energy $\left(2.18 \times 10^{-18} \mathrm{~J}\right)$ to escape from the atom. The wavelength of the emitted electron (in $m$ ) is ( $m_e=9 \times 10^{-31} \mathrm{~kg}$ )
AP EAPCET 2024 - 19th May Evening Shift
16
A golf ball of mass $m \mathrm{~g}$ has a speed of $50 \mathrm{~ms}^{-1}$. If the speed can be measured within accuracy of $2 \%$ the uncertainty in the position is (in m)
AP EAPCET 2024 - 19th May Evening Shift
17
The de-Broglie wavelength of a particle of mass 1 mg moving with a velocity of $10 \mathrm{~ms}^{-1}$ is $\left(\mathrm{h}=6.63 \times 10^{-34} \mathrm{Js}\right.$ )
AP EAPCET 2024 - 18th May Morning Shift
18
Correct set of four quantum numbers for the valence electron of strontium $(z=38)$ is
AP EAPCET 2024 - 18th May Morning Shift
19

The wavelength associated with the electron moving in the first orbit of hydrogen atom with velocity $$2.2 \times 10^6 \mathrm{~ms}^{-1}$$ (in nm) is

$$\left(m_e=9.0 \times 10^{-31} \mathrm{~kg}, h=6.6 \times 10^{-34} \mathrm{Js}\right)$$

AP EAPCET 2022 - 5th July Morning Shift
20

The energy required (in eV) to excite an electron of H -atom from the ground state to the third state is

AP EAPCET 2022 - 5th July Morning Shift
21

The maximum number of electrons present in an orbital with $$n = 4, l = 3$$ is

AP EAPCET 2022 - 4th July Evening Shift
22

Which quantum number provides information about the shape of an orbital?

AP EAPCET 2022 - 4th July Evening Shift
23

If $$\Delta x$$ is the uncertainty in position and $$\Delta v$$ is the uncertainty in velocity of a particle are equal, the correct expression for uncertainty in momentum for the same particle is

AP EAPCET 2022 - 4th July Morning Shift
24

The number of radial nodes and angular nodes of a $$4 f$$-orbital are respectively

AP EAPCET 2022 - 4th July Morning Shift
25

The number of protons, neutrons and electrons in $$_6^{13}$$C respectively are

AP EAPCET 2021 - 20th August Morning Shift
26

The masses of an electron, a proton and a neutron respectively will be n the ratio

AP EAPCET 2021 - 20th August Morning Shift
27

Match the following species with the correct number of electrons present in them.

Species Number of electrons
A. Be$$^{2+}$$ (i) 0
B. H$$^+$$ (ii) 10
C. Na$$^+$$ (iii) 2
D. Mg$$^+$$ (iv) 11
(v) 4

AP EAPCET 2021 - 20th August Morning Shift
28

Assuming that the incident radiation is capable of ejecting photoelectrons from all the given metals, the lowest kinetic energy of the ejected photoelectron is observed with which of the given metals?

AP EAPCET 2021 - 19th August Evening Shift
29

If the energies of two light radiations $$E_1$$ and $$E_2$$ are $$25 \mathrm{~eV}$$ and $$100 \mathrm{~eV}$$ respectively, then their respective wavelengths $$\lambda_1$$ and $$\lambda_2$$ would be in the ratio $$\lambda_1: \lambda_2$$

AP EAPCET 2021 - 19th August Evening Shift
30

If two particles A and B are moving with the same velocity, but wavelength of A is found to be double than that of B. Which of the following statement is correct?

AP EAPCET 2021 - 19th August Morning Shift
31

The spectrum of helium is expected to be similar to that of

AP EAPCET 2021 - 19th August Morning Shift
32

On the basis of Bohr’s model, the radius of the 3rd orbit is

AP EAPCET 2021 - 19th August Morning Shift
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