Question

which is correct about rusting and burning (a). both require O2 (b). both produce oxides (c). both are exothermic (d). all of the above​

Answer 1

Answer:

d. all the above is correct option.

Answer 2

All the statement given in the options are correct about rusting. Thus, (d) all of the above is correct.

Explanation:

(a) Both require $O_{2}$

• The process such as rusting and burning requires oxygen for its happening.
• The chemical reaction involved in burning of coal is as follows:

$C+O_{2}$ → $CO_{2}$

• The chemical reaction involved in rusting is:

$4Fe+3O_{2} +2H_{2}O$ → $2Fe_{2}O_{3}.H_{2}O$

(b) Both produce oxides

• Burning releases oxides of carbon, nitrogen and sulfur.
• Rusting releases oxides of iron.

(c) Both are exothermic

• When rusting or burning happens it releases heat energy out.
• Thus, both the process are considered as exothermic reactions.

(d) All of the above

• The conditions given in option (a), (b) and (c) are all true.
• Hence, this option is considered as the correct one.