Question

Metal A belongs to period 3 and group 13 . A red hot condition reacts with steam to form B . A with strong alkali forms C . Find A , B and C with reactions

Answer 1

Answer:

A - Aluminum metal

B - Aluminum oxide

C - Sodium hydroxide

Explanation:

Metal A belongs to 3 period and group 13 so it is Aluminum

Generally Water does not react  with aluminium due to the layer of oxide  on it.

But when When steam is passed over red hot  aluminium, hydrogen is produced.

2 Al + 3 H2O →              Al2O3 +           3 H2↑

         (steam)           (aluminium oxide)

It reacts with strong  caustic alkali like sodium hydroxide forming Sodium metal aluminate.

2 Al + 2 NaOH +2 H2O → 2 NaAlO2  + 3 H2↑

                                            (Sodium meta aluminate)

so

A - Aluminum metal

B - Aluminum oxide

C - Sodium hydroxide