WB JEE 2023 | Atomic Structure Question 1 | Chemistry

WB JEE 2023

MCQ (Single Correct Answer)

-0.25

Two base balls (masses : m$$_1$$ = 100 g, and m$$_2$$ = 50 g) are thrown. Both of them move with uniform velocity, but the velocity of m$$_2$$ is 1.5 times that of m$$_1$$. The ratio of de Broglie wavelengths $$\lambda$$(m$$_1$$) : $$\lambda$$(m$$_2$$) is given by

4 : 3

3 : 4

2 : 1

1 : 2

WB JEE 2022

MCQ (Single Correct Answer)

-0.25

The number of unpaired electron in Mn²⁺ ion is

WB JEE 2022

MCQ (Single Correct Answer)

-0.25

The de-Broglie wavelength ($$\lambda$$) for electron (e), proton (p) and He²⁺ ion ($$\alpha$$) are in the following order. Speed of e, p and $$\alpha$$ are the same

$$\alpha$$ > p > e

e > p > $$\alpha$$

e > $$\alpha$$ > p

$$\alpha$$ < p > e

WB JEE 2022

MCQ (Single Correct Answer)

-0.25

In Bohr model of atom, radius of hydrogen atom in ground state is r₁ and radius of He⁺ ion in ground state is r₂. Which of the following is correct?

$${{{r_1}} \over {{r_2}}} = 4$$

$${{{r_1}} \over {{r_2}}} = {1 \over 2}$$

$${{{r_1}} \over {{r_2}}} = {1 \over 4}$$

$${{{r_2}} \over {{r_1}}} = {1 \over 2}$$

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