Many people cook with natural gas, which is mainly methane, CH 4 . The equation for its combustion is : CH 4 ( g ) + 2 O 2 ( g ) → CO 2 ( g ) + 2 H 2 O ( l ) Justify that this reaction is a redox reaction on the basis of change in oxidation states.

CH 4 ( g ) + 2 O 2 ( g ) → CO 2 ( g ) + 2 H 2 O ( l ) In the above reaction, carbon undergoes oxidation as its oxidation number increases from - 4 in CH 4 to + 4 in CO 2 and simultaneously in this reaction oxygen undergoes reduction as its oxidation number decreases from 0 in O 2 to - 2 in H 2 O . This reaction is an example of redox reaction as it involves simultaneous oxidation and reduction.

Many people cook with natural gas, which is mainly methane, CH 4 . The equation for its combustion is : CH 4 ( g ) + 2 O 2 ( g ) → CO 2 ( g ) + 2 H 2 O ( l ) Justify that this reaction is a redox reaction on the basis of change in oxidation states.

CH 4 ( g ) + 2 O 2 ( g ) → CO 2 ( g ) + 2 H 2 O ( l ) In the above reaction, carbon undergoes oxidation as its oxidation number increases from - 4 in CH 4 to + 4 in CO 2 and simultaneously in this reaction oxygen undergoes reduction as its oxidation number decreases from 0 in O 2 to - 2 in H 2 O . This reaction is an example of redox reaction as it involves simultaneous oxidation and reduction.

Is this a redox reaction? Give your evidence. 2 Mg ( s ) + CO 2 ( g ) → 2 MgO ( s ) + C ( s )

2 Mg ( s ) + CO 2 ( g ) → 2 MgO ( s ) + C ( s ) In the given reaction, Mg undergoes oxidation as its oxidation number increases from 0 in Mg to + 2 in MgO and simultaneously carbon undergoes reduction as its oxidation number decreases from + 4 in CO 2 to 0 in C . As this reaction involves simultaneous oxidation and reduction, it is an example of redox reaction.

Is this a redox reaction? Give your evidence. SiO 2 ( s ) + C ( s ) → Si ( s ) + CO 2 ( g )

SiO 2 ( s ) + C ( s ) → Si ( s ) + CO 2 ( g ) In this reaction, Si undergoes reduction as its oxidation number decreases from + 4 in SiO 2 to 0 in Si and simultaneously carbon undergoes oxidation as its oxidation number increases from 0 in C to + 4 in CO 2 . As this reaction involves simultaneous oxidation and reduction, the given reaction is a redox reaction.

Is this a redox reaction? Give your evidence. NaOH ( aq ) + HCl ( aq ) → NaCl ( aq ) + H 2 O ( l )

Given reaction along with oxidation number of each atom present in the equation is represented as, NaOH ( aq ) + 1 - 2 + 1 + HCl ( aq ) + 1 - 1 → NaCl ( aq ) + 1 - 1 + H 2 O ( l ) + 1 - 2 In this reaction, the oxidation number of the atoms are unchanged. Hence, this reaction is not an example of redox reaction. This reaction is a special type of double displacement reaction called neutralization reaction.

Is this a redox reaction? Give your evidence. Fe ( s ) + CuO ( s ) → FeO ( s ) + Cu ( s )

Fe ( s ) + CuO ( s ) → FeO ( s ) + Cu ( s ) In this reaction, Fe undergoes oxidation as its oxidation number increases from 0 in Fe to + 2 in FeO and simultaneously Cu undergoes reduction as its oxidation number decreases from + 2 in CuO to 0 in Cu . As this reaction involves simultaneous oxidation and reduction, it is an example of redox reaction.