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1
AP EAPCET 2025 - 23rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0
The ratio of the wavelengths of the spectral lines emitted due to transitions $3 \rightarrow 2$ and $2 \rightarrow 1$ orbits in the hydrogen atom is
A

$3: 1$

B

$9: 17$

C

$27: 5$

D

$25: 9$

2
AP EAPCET 2025 - 23rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The density (in $\mathrm{kg} \mathrm{m}^{-3}$ ) of nuclear matter is of the order of

A

$10^{21}$

B

$10^{17}$

C

$10^{12}$

D

$10^8$

3
AP EAPCET 2025 - 23rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Of the following, Bohr's atomic model is applicable to

A

explain relative intensities of spectral lines emitted by hydrogen atoms

B

helium atom

C

lithium atom

D

hydrogenic atoms

4
AP EAPCET 2025 - 23rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The ratio of the orders of the spacings of nuclear energy levels and atomic energy levels is

A

$10^3$

B

$10^6$

C

$10^9$

D

$10^{12}$

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