Select the pair of molecules having same molecular mass.

H_{2}, H e

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C H_{4}, O_{2}

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C_{2} H_{4}, N_{2}

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C a S O_{4}, H_{3} P O_{4}

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Solution

The correct option is B $C_{2} H_{4}, N_{2}$
The molecular mass of the gioven pairs:

$H_{2}$ = 2 and $H e$ = 4

$C H_{4}$ $= 12 + 4 = 16$ and $O_{2}$ $= 16 \times 2 = 32$

$C_{2} H_{4}$ $= 12 \times 2 + 4 = 28$ and $N_{2}$ $14 \times 2 = 28$

$C a S O_{4}$ = 136 and $H_{3} P O_{4}$ = 98

Hence, the correct option is $C$

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Similar questions

Question 1
Calculate the molecular masses of $H_{2}, O_{2}, C l_{2}, C O_{2}, C H_{4}, C_{2} H_{6}, C_{2} H_{4}, N H_{3}, C H_{3} O H$ .

H_{2}, O_{2}, C l_{2}, C O_{2}, C H_{4}, C_{2} H_{6}, C_{2} H_{4}, N H_{3}, C H_{3} O H

S T P

H_{2}, N_{2}, O_{2}

H B r

(i) C_{2} H_{4} (i i) A l C l_{3} (i i i) C H_{4} (i v) N F_{3}

0^{o} C

C O_{2}, C H_{4}

N_{2}

H_{2}

Z > 1

H_{2}

C O_{2}, C H_{4}

N_{2}

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