Chemistry
Give balanced equations for the following conversions:
Zinc to sodium zincate - using an alkali.
Acidified water to hydrogen - by electrolysis.
Water gas to hydrogen - industrially.
Iron [III] oxide to iron - using hydrogen.
Nitrogen to a basic gas - using hydrogen.
Related Questions
With reference to oxidation & reduction reactions - complete the statement given by filling in the blanks with only the words
(a) Addition
(b) Removal.
'Oxidation is a chemical reaction involving …………… of oxygen to a substance or …………… of hydrogen from a substance. Reduction on the other hand involves …………… of hydrogen to a substance or …………… of oxygen from a substance.
With reference to the equation:
Cl2 + H2S ⟶ 2HCl + S
pertaining to a redox reaction - select the correct answer in each case -
(a) Chlorine is oxidised/reduced to HCl.
(b) Hydrogen sulphide is oxidised/reduced to sulphur since the reaction involves addition/removal of hydrogen.
(c) Chlorine acts as an oxidising/reducing agent.
Give reasons for the following:
Copper does not displace hydrogen from dilute hydrochloric acid, but zinc does.
In the preparation of hydrogen by electrolysis of water - the distilled water used is acidified.
In the laboratory preparation of hydrogen from zinc and dilute hydrochloric acid the zinc used is granulated zinc.
In Bosch process - the final gaseous products are passed through caustic potash [KOH] soln.
The reaction of chlorine with hydrogen sulphide is deemed a redox reaction.
Select the correct answer from A, B, C, D or E for each statement given below:
A: Nickel
B: Sodium
C: Iron
D: Iron [III] oxide
E: Magnesium oxide
A metal which reacts with water to give a metallic hydroxide & liberate hydrogen.
The metallic compound used as a catalyst in Bosch process.
The metal used as a catalyst in hydrogenation of oils.
The metal which reacts with steam liberating hydrogen & the reaction is reversible.
The metallic compound formed when a metal above aluminium in the activity series reacts with steam.