a) Electrolysis of water is a/an ------ decomposition reactions.
b) Give one example of the reaction involving combination of an element with another element.
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a. Electrolysis of water is an electolytic decomposition reaction.
b. Between elements :
C + O2 → CO2
Carbon completely burnt in oxygen yields carbon dioxide
Between compounds :
CaO + H2O → Ca(OH)2
Calcium oxide (lime) combined with water gives calcium hydroxide (slaked lime)
Between elements and compounds :
2CO + O2 → 2CO2
Oxygen combines with carbon monoxide, and carbon dioxide is formed.
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a =
an
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