23. Which metals react with water in the form of steam?a) Ironb) Zincc

1.	23. Which metals react with water in the form of steam?a) Ironb) Zincc) Aluminium Ld AtT of these
Answer» (d) Reaction of aluminium metal with water:Reaction of aluminium metal with cold water is too slow to come into notice. But when steam is passed over aluminium metal; aluminium oxide and hydrogen gas are produced. 2Al + 3H2O ⇨ Al2O3+ 2H2 Reaction of zinc metal with water:Zinc metal produces zinc oxide and hydrogen gas when steam is passed over it. Zinc does not react with cold water. Zn + H2O ⇨ ZnO + H2 Reaction of Iron with water:Reaction of iron with cold water is very slow and come into notice after a long time. Iron forms rust (iron oxide) when reacts with moisture present in atmosphere. Iron oxide and hydrogen gas are formed by passing of steam over iron metal. 3Fe + 4H2O ⇨ Fe3O4+ 4H2

23. Which metals react with water in the form of steam?a) Ironb) Zincc) Aluminium Ld AtT of these

Answer»

(d)

Reaction of aluminium metal with water:Reaction of aluminium metal with cold water is too slow to come into notice. But when steam is passed over aluminium metal; aluminium oxide and hydrogen gas are produced.

2Al + 3H2O ⇨ Al2O3+ 2H2

Reaction of zinc metal with water:Zinc metal produces zinc oxide and hydrogen gas when steam is passed over it. Zinc does not react with cold water.

Zn + H2O ⇨ ZnO + H2

Reaction of Iron with water:Reaction of iron with cold water is very slow and come into notice after a long time. Iron forms rust (iron oxide) when reacts with moisture present in atmosphere.

Iron oxide and hydrogen gas are formed by passing of steam over iron metal.

3Fe + 4H2O ⇨ Fe3O4+ 4H2

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