1.

Which of the following reactions shows reduction of water ?

Answer»

`2H_(2)O + 2Na to 2NAOH + H_(2)`
`6CO_(2) + 12H_(2)O to C_(6)H_(12)O_(6) + 6H_(2)O + 6O_(2)`
`2F_(2) + 2H_(2)O to 4H^(+) + 4F^(-) + O_(2)`
`P_(4)O_(10) + 6H_(2)O to 4H_(3)PO_(4)`

SOLUTION :Water is reduced to dihydrogen by highly ELECTROPOSITIVE metals. In this reaction `H_(2)O` is reduced to `H_(2)`. In other two reactions, `H_(2)O` is oxidised to `O_(2)` and `P_(4)O_(10)` is hydrolysed by water.


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