MCQ
Aluminium foils are used for:
- AWrapping chocolates and food stuff.
- BTo prepare hydrogen.
- ✓Both $A$ and $B.$
- DNone of these.
✓
Answer
Correct option: C.
Both $A$ and $B.$
Aluminium foils are impermeable to oxygen and water; thus are used for wrapping chocolates and foodstuff.
It can be used for the preparation of hydrogen using the reaction of aluminium foil with a sodium hydroxide solution.
$2 \mathrm{Al}+2 \mathrm{NaOH}+6 \mathrm{H}_2 \mathrm{O} \rightarrow 2 \mathrm{Na}\left[\mathrm{Al}(\mathrm{OH})_4\right]+3 \mathrm{H}_2 \uparrow$
It can be used for the preparation of hydrogen using the reaction of aluminium foil with a sodium hydroxide solution.
$2 \mathrm{Al}+2 \mathrm{NaOH}+6 \mathrm{H}_2 \mathrm{O} \rightarrow 2 \mathrm{Na}\left[\mathrm{Al}(\mathrm{OH})_4\right]+3 \mathrm{H}_2 \uparrow$
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