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JEE CHEMISTRY MCQ: STRUCTURE OF ATOM

1 Medium

1 of 1

Application +4 | -1

If the ratio of radii of two shells of a

\mathrm{H}

-like species is

25: 64

, then the ratio of the velocities will be

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Correct option: D

8: 5

Option A (4) is correct because 1 mole of sodium hypophosphite reacts with excess silver nitrate to produce 4 moles of silver.

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Which of the following is paramagnetic? The time taken by the electron in one complete revolution in the

n^{\text {th }}

Bohr's orbit of the hydrogen atom is The candela is the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency '

\mathrm{A}

\times 10^{12}

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\frac{1}{{ }^{\prime} \mathrm{B}^{\prime}}

watt per steradian. 'A' and 'B' are respectively Quantum number which defines the orientation of orbital present in a subshell is Maximum number of electrons associated with

\ell = 1,\,\,m = 0

in magnesium atom is The nucleus and an atom can be assumed to be spherical. The radius of the nucleus of mass no. A is given by

1.25 \times {10^{ - 13}} \times {A^{1/3}}\mathrm{cm}.

. The atomic radius of atom is 1 Å. If the mass no. is 64, the fraction of the atomic volume that is occupied by nucleus is: