1
MHT CET (PCB) 2025 9th April Morning Shift
MCQ (Single Correct Answer)
+1
-0
Calculate the energy of photon in electromagnetic radiation having wavelength $400 \mathrm{~nm}\left(\mathrm{~h}=6.626 \times 10^{-34} \mathrm{Js} ; \mathrm{c}=3 \times 10^8 \mathrm{~ms}^{-1}\right)$.
A

$4.061 \times 10^{-19} \mathrm{~J}$

B

$4.969 \times 10^{-19} \mathrm{~J}$

C

$5.226 \times 10^{-19} \mathrm{~J}$

D

$4.118 \times 10^{-19} \mathrm{~J}$

2
MHT CET (PCB) 2024 22th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

What is the radius of first orbit of monopositive helium ion?

A
13.23 pm
B
26.45 pm
C
39.68 pm
D
19.84 pm
3
MHT CET (PCB) 2024 22th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

What is the frequency of red light having wave length 750 nm ?

A
$3.0 \times 10^{14} \mathrm{~Hz}$
B
$4.0 \times 10^{14} \mathrm{~Hz}$
C
$7.5 \times 10^{14} \mathrm{~Hz}$
D
$9.0 \times 10^{14} \mathrm{~Hz}$
4
MHT CET (PCB) 2024 22th April Morning Shift
MCQ (Single Correct Answer)
+1
-0
What are the possible values of magnetic quantum number for $p$ orbital?
A
2
B
3
C
5
D
6

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