Advertisements
Advertisements
प्रश्न
Steam can react with metal and non-metal to liberate hydrogen. Give the necessary conditions and equations for the same.
उत्तर
With metals:
3Fe + 4H2O ⇋ Fe3O4 + 4H2
With non-metals:
Steam is passed over hot coke (1000°C) in furnaces of a special design called inverters giving water gas.
C + H2O (CO + H2) - ∆
Water is mixed with excess steam and passed over heated ferric oxide which acts as a catalyst and chromic oxide which acts as a promoter.
(CO + H2) + H2O CO2 + 2H2 + ∆
The above mixture CO2 + H2 is formed through cold water under pressure (30 atm) or through caustic potash solution, which dissolves the more soluble carbon dioxide leaving hydrogen.
2KOH + CO2 →K2CO3 + H2O
The mixture is passed through an ammoniacal cuprous chloride solution in order to dissolve any uncombined carbon monoxide.
CuCl + CO + 2H2O →CuCl.CO.2H2O
APPEARS IN
संबंधित प्रश्न
Why does hydrogen show dual nature?
Compare hydrogen with alkali metals on the basis of:
Reaction with oxygen
Why hydrogen was called 'inflammable air'?
State some sources of hydrogen.
Compare hydrogen and halogens on the basis of:
ion formation
Write a balanced equation for the following:
Zinc reacts with caustic soda solution
Write a balanced equation for the following:
Lead reacts with potassium hydroxide
Write a balanced equation for the following:
Aluminium reacts with fused sodium hydroxide.
Select the correct answer from the symbol in the bracket.
The element placed below hydrogen in group 1 [IA].
Select the correct answer from the symbol in the bracket.
The element other than hydrogen, which forms a molecule containing a single covalent bond.
