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Aluminium reacts with dil. HCl and conc....

Aluminium reacts with dil. `HCl` and conc. `NaOH` solutio n to liberate______gases, respectively.

A

`H_(2)` and `O_(2)`

B

`O_(2)` and `H_(2)`

C

`H_(2)` and `H_(2)`

D

`O_(2)` and `O_(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
`Al` shows amphoteric character. It dissolves in dil. `HCl` evolving hydrogen:
`2Al + 6HCl rarr 2AlCl_(3) + 3H_(2)`
It is attacked by caustic soda with the evolution of hydrogen:
`2Al + 2NaOH + 2H_(2)O rarr 2NaAlO_(2) + 3H_(2)`
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