1
AP EAPCET 2022 - 4th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

Energy of a stationary electron in the hydrogen atom is $$E=\frac{13.6}{n^2} \mathrm{~eV}$$, then the energies required to excite the electron in hydrogen atom to (a) its second excited state and (b) ionised state, respectively.

A
(a) $$\sim 10 \mathrm{~eV}$$ (b) 13.6 eV
B
(a) $$\sim 12 \mathrm{~eV}$$, (b) 13.6 eV
C
(a) $$\sim 12 \mathrm{~eV}$$, (b) 10.6 eV
D
(a) $$\sim 8 \mathrm{~eV}$$, (b) 13.6 eV
2
AP EAPCET 2022 - 4th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

The graph of $$\ln \left(\frac{R}{R_0}\right)$$ versus $\ln A$ is where $$R$$ is radius of a nucleus, $$A$$ is its mass number, and $$R_0$$ is constant

A
A straight line
B
A circle of radius R
C
A parabola
D
An ellipse
3
AP EAPCET 2021 - 20th August Morning Shift
MCQ (Single Correct Answer)
+1
-0

The angular momentum of the orbital electron is integral multiple of

A
$$h$$
B
$$2\pi h$$
C
$$\frac{h}{2\pi}$$
D
$$3\pi h$$
4
AP EAPCET 2021 - 20th August Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following values is the correct order of nuclear density?

A
$$5 \times 10^5 \mathrm{~kgm}^{-3}$$
B
$$9 \times 10^{10} \mathrm{~kgm}^{-3}$$
C
$$3 \times 10^{21} \mathrm{~kgm}^{-3}$$
D
$$2 \times 10^{17} \mathrm{~kgm}^{-3}$$
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