WB JEE 2022 | Atomic Structure Question 8 | Chemistry

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WB JEE 2022

MCQ (Single Correct Answer)

-0.25

Which one of the following is the correct set of four quantum numbers (n, 1, m, s) ?

$$\left( {3,0, - 1, + {1 \over 2}} \right)$$

$$\left( {4,3, - 2, - {1 \over 2}} \right)$$

$$\left( {3,1, - 2, - {1 \over 2}} \right)$$

$$\left( {4,2, - 3, + {1 \over 2}} \right)$$

WB JEE 2021

MCQ (Single Correct Answer)

-0.5

The atomic masses of helium and neon are 4.0 and 20.0 amu respectively. The value of the de-Broglie wavelength of helium gas at $$-$$73$$^\circ$$C is M times the de-Broglie wavelength of neon at 727$$^\circ$$C. The value of M is

$${1 \over {5}}$$

$${1 \over {25}}$$

WB JEE 2020

MCQ (Single Correct Answer)

-0.25

The maximum number of electrons in an atom in which the last electron filled has the quantum numbers n = 3, l = 2 and m = $$ - $$ 1 is

WB JEE 2020

MCQ (Single Correct Answer)

-0.25

The radius of the first Bohr orbit of a hydrogen atom is 0.53 $$\times {10^-8}$$ cm. The velocity of the electron in the first Bohr orbit is

$$2.188 \times {10^8}$$ cm s^-1

$$4.376 \times {10^8}$$ cm s^-1

$$1.094 \times {10^8}$$ cm s^-1

$$2.188 \times {10^9}$$ cm s^-1

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