1.

Which of the following is NOT a redox reaction ?

Answer»

`CaCO_(3) RARR CaO + CO_(2)`
`O_(2)+2H_(2) rarr 2H_(2)O`
`Na+ H_(2) O rarr NaOH + 1//2 H_(2)`
`3H_(3) AsO_(3(aq)) +BrO_3^(-) (aq)rarr Br_((aq))^(-) + 3H_(3) AsO_(4(aq))`

Answer :A


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