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Arsenic forms two oxides, one of which c...

Arsenic forms two oxides, one of which contains 65.2 % and the other 75.7% of the element. Hence, equivalent masses of arsenic are in the ratio

A

`1:2`

B

`3:5`

C

`13:15`

D

`2:1`

Text Solution

Verified by Experts

The correct Answer is:
B
In first oxide
Mass of arsenic = 65.2
Mass of oxygen = 34.8
`:.` Eq. mass of arsenic `= (65.2)/(34.8)xx8 = 14.99`
In second oxide,
Mass of arsenic = 75.7 g
Mass of oxygen = 24.3 g
`:.` Eq. mass of arsenic `= (75.7)/(24.3)xx8`
`=24.92`
`underset(("oxide I"))("Eq. mass of arsenic")" : "underset(("oxide II"))("Eq. mass of arsenic")`
`14.99:24.92`
or 3:5
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