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Q.

Consider the following given samples :
(I)1gms of hydrogen
(II)1 gm of sulfur
(III)1 gm of oxygen
(IV)1 gm of phosphorus
Correct increasing order of atoms is

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a

II<IV<III<I

b

I<II<III<IV

c

IV<III<II<I

d

II<III<I<IV

answer is C.

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Detailed Solution

Number of atoms = $\frac{given mass \times atomicity \times N_{A}}{Molar mass}$

Number of atoms in 1 gm hydrogen	$\frac{1 \times 2 \times N_{A}}{2}$ = N_A
Number of atoms in 1 gm of oxygen	$\frac{1 \times 2 \times N_{A}}{32} = \frac{N_{A}}{16}$
Number of atoms in 1 gm phosphorus	$\frac{1 \times 4 \times N_{A}}{124} = \frac{N_{A}}{31}$
Number of atoms in 1 gm of sulfur	$\frac{1 \times 8 \times N_{A}}{256} = \frac{N_{A}}{32}$

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Consider the following given samples :(I)1gms of hydrogen(II)1 gm of sulfur(III)1 gm of oxygen(IV)1 gm of phosphorusCorrect increasing order of atoms is