which of the following is a redox reacti...

which of the following is a redox reaction ?

A

`NaCl+KNO_(3)rarrNaNO_(3)+KCl`

B

`CaC_(2)O_(4)+2HClrarrCaCl_(2)+H_(2)C_(2)O_(4)`

C

`Mg(OH)_(2)+2NH_(4)ClrarrMgCl_(2)+2NH_(4)OH`

D

`Zn+2AgCNrarr2Ag+Zn(CN)_(2)`

Text Solution

Verified by Experts

The correct Answer is:

D

`ZnrarrZn^(2+)+2e^(-)`
`Ag^(o+)+e^(-)rarrAg`
In `(a), (b)` and `(c )`, oxidation number does not change.

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Knowledge Check

Which fo the following is a redox reaction ?

A

`Na_2SO_4 + BaCl_2 rarr BaSO_4 + 2NaCl`

B

` SO_2 + H_2O rarr H_2SO_3`

C

`2 CuSO_4 + 4Kl rarr 2Cu l +2K_2SO_4`+I_2

D

` CuSO_4 + 4NH_3 rarr [Cu(NH_3)_4]SO_4`

Which of the following is redox reaction ?

A

`H_(2)SO_(4)` with `NaOH`

B

In atmosphere, `O_(3)` from `O_(2)` by lighting

C

Nitrogen oxides from nitrogen and oxygen by lightning

D

Evaporation of `H_(2)O`

Which of the following is are redox reaction(s) ?

A

`BaO_(2)+H_(2)SO_(4)toBaSO_(4)+H_(2)O_(2)`

B

`2BaO+O_(2)to2BaO_(2)`

C

`2kClO_(3)to2kCl+3O_(2)`

D

`SO_(2)+2H_(2)Sto2H_(2)O+3S`

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