(b) (i) The chemical equation for the reaction when carbon (IV) oxide gas is passed over heated charcoal is:
This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
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Here are the solutions to the questions:
(b) (i) The chemical equation for the reaction when carbon (IV) oxide gas is passed over heated charcoal is:
$$ \text{CO}_2\text{(g)} + \text{C(s)} \xrightarrow{\text{heat}} 2\text{CO(g)} $$
(b) (ii) One use of carbon (II) oxide is:
• As a reducing agent in the extraction of metals from their ores (e.g., iron from iron oxide).
• As a fuel.
(c)
Observation:
In Set I, the bulb will light up.
In Set II, the bulb will not light up.
Explanation:
Graphite (in Set I) is a good conductor of electricity because it has a layered structure with delocalized electrons that are free to move and carry charge. Diamond (in Set II) is a non-conductor of electricity because all its valence electrons are used in strong covalent bonds within its rigid tetrahedral structure, leaving no free electrons to conduct electricity.
