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1
MHT CET 2026 19th April Evening Shift
MCQ (Single Correct Answer)
+1
-0
Calculate the shortest wavelength in hydrogen spectrum emission of Lymen series ($R_H = 109677\,\text{cm}^{-1}$)
A
$9.117 \times 10^{-6}$ cm
B
$9.241 \times 10^{-6}$ cm
C
$9.360 \times 10^{-6}$ cm
D
$9.482 \times 10^{-6}$ cm
2
MHT CET 2026 19th April Morning Shift
MCQ (Single Correct Answer)
+1
-0
What is the wave number of lowest transition associated with Paschen series?
A
$\bar{v} = R_H\left(\dfrac{5}{36}\right)\ \text{cm}^{-1}$
B
$\bar{v} = R_H\left(\dfrac{36}{5}\right)\ \text{cm}^{-1}$
C
$\bar{v} = R_H\left(\dfrac{144}{7}\right)\ \text{cm}^{-1}$
D
$R_H\left(\dfrac{7}{144}\right)\ \text{cm}^{-1}$
3
MHT CET 2025 5th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Calculate the frequency in Hz of orange colour light having wavelength 600 nm .

$$ \left[\mathrm{C}=3 \times 10^8 \mathrm{~ms}^{-1}\right] $$

A

$5.4 \times 10^{14} \mathrm{~Hz}$

B

$5.0 \times 10^{14} \mathrm{~Hz}$

C

$5.8 \times 10^{14} \mathrm{~Hz}$

D

$6.2 \times 10^{14} \mathrm{~Hz}$

4
MHT CET 2025 26th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

"Pairing of electrons in the orbitals belonging to the same subshell does not occur unless each orbital belonging to that subshell has got one electron each." This statement is known as

A

Pauli's exclusion principle

B

Hund's rule

C

Aufbau rule

D

Heisenberg uncertainty principle

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