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A non-metal .X. with electronic configur...

A non-metal .X. with electronic configurations 2, 4 forms two oxides in which .X. shows valencies two and four. Oxide with higher valency is dissolved in water. The acid so produced is treated with NaOH to form salt. What could be the formula of the salt?

A

`NaXO_(3)`

B

`Na_(2)XO_(3)`

C

`NaXO_(4)`

D

`Na_(2)XO_(4)`

Text Solution

Verified by Experts

The correct Answer is:
B
Carbon forms two oxides CO and `CO_(2)`, and the valencies of carbon are 2 and 4, respectively.
`CO_(2)+H_(2)O to H_(2)CO_(3)` carbonic acid
`NaOH +H_(2)CO_(3) to NaHCO_(3) (or) Na_(2)CO_(3)`
Hence, the correct option is (b).
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