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Mole Concept

Which of the ...

Question

Which of the following has the least number of molecules ?

2

g of

H_{2}

gas

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22.4

L of

S O_{2}

gas at NTP

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1

mole of

S O_{2}

gas

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35.5

C l_{2}

gas

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Solution

The correct option is B $35.5$ g $C l_{2}$ gas
$2$ g of $H_{2}$ gas has $1$ mole.
$22.4$ L of $S O_{2}$ gas at NTP has also $1$ mole.
$1$ mole $S O_{2}$ gas has already given $1$ mole.
$35.5$ g of $C l_{2}$ = $\frac{35.5}{71} = 0.5$ mole.
Hence chlorine has minimum number of moles and thus minimum number of molecules.

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Similar questions

Which of the following figures does not represent 1 mole of dioxygen gas at STP?

(a) 16 g of gas (b) 22.4 L of gas

21 g

S O_{2}

1.21 \times 10^{23}

O_{2}

(l)

S O_{2}

3.0115 \times 10^{23}

(P_{4})

10

H_{2}

1 g

N a_{2} C O_{3}

33.6 L

C O_{2}

S O_{2}

H_{2}

S O_{2}

H_{2}

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