1

JEE Main 2021 (Online) 31st August Morning Shift

Numerical

+4

-1

Ge(Z = 32) in its ground state electronic configuration has x completely filled orbitals with m

_{l}= 0. The value of x is ___________.Your input ____

2

JEE Main 2021 (Online) 27th August Evening Shift

Numerical

+4

-1

The number of photons emitted by a monochromatic (single frequency) infrared range finder of power 1 mW and wavelength of 1000 nm, in 0.1 second is x $$\times$$ 10

(h = 6.63 $$\times$$ 10

^{13}. The value of x is _____________. (Nearest integer)(h = 6.63 $$\times$$ 10

^{$$-$$34}Js, c = 3.00 $$\times$$ 10^{8}ms^{$$-$$1})Your input ____

3

JEE Main 2021 (Online) 27th August Morning Shift

Numerical

+4

-1

The kinetic energy of an electron in the second Bohr orbit of a hydrogen atom is equal to $${{{h^2}} \over {xma_0^2}}$$. The value of 10x is ___________. (a

_{0}is radius of Bohr's orbit) (Nearest integer) [Given : $$\pi$$ = 3.14]Your input ____

4

JEE Main 2021 (Online) 26th August Evening Shift

Numerical

+4

-1

A metal surface is exposed to 500 nm radiation. The threshold frequency of the metal for photoelectric current is 4.3 $$\times$$ 10

[Use : h = 6.63 $$\times$$ 10

^{14}Hz. The velocity of ejected electron is ____________ $$\times$$ 10^{5}ms^{$$-$$1}(Nearest integer)[Use : h = 6.63 $$\times$$ 10

^{$$-$$34}Js, m_{e}= 9.0 $$\times$$ 10^{$$-$$31}kg]Your input ____

Questions Asked from Structure of Atom (Numerical)

Number in Brackets after Paper Indicates No. of Questions

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