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1
MHT CET 2025 19th April Morning Shift
MCQ (Single Correct Answer)
+1
-0
Calculate the longest wavelength in hydrogen emission spectrum of Lyman series. $$\left(\mathrm{R}_{\mathrm{H}}=109677 \mathrm{~cm}^{-1}\right)$$
A
$1.331 \times 10^{-5} \mathrm{~cm}$
B
$1.216 \times 10^{-5} \mathrm{~cm}$
C
$1.445 \times 10^{-5} \mathrm{~cm}$
D
$1.556 \times 10^{-5} \mathrm{~cm}$
2
MHT CET 2024 16th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

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

A
0.111 nm
B
0.0333 nm
C
1.22 nm
D
2.42 nm
3
MHT CET 2024 16th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

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

A
Paschen
B
Lyman
C
Pfund
D
Balmer
4
MHT CET 2024 16th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

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

A
$2.5 \times 10^6 \mathrm{~m}^{-1}$
B
$4.0 \times 10^6 \mathrm{~m}^{-1}$
C
$6.5 \times 10^6 \mathrm{~m}^{-1}$
D
$8.0 \times 10^6 \mathrm{~m}^{-1}$
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