What type of chemical reaction is represented by: 2Mg(s) + O2(g) -> 2MgO(s)?
Answer and explanation
Correct answer: D. Combination (synthesis) and oxidation-reduction reaction
- Step 1: Two elements combine to form a single compound (combination/synthesis). Step 2. Magnesium loses electrons (oxidised) and oxygen gains electrons (reduced), so it is also a redox reaction. Answer: Combination (synthesis) and oxidation-reduction reaction. Why not the others: Decomposition breaks compounds apart into simpler products.
Practise more Chemical Reactivity, Bonding, Structure and Organic Chemistry.
Free questions with an explanation for every one, and full timed National Certificate of Educational Achievement mock tests.
More Chemical Reactivity, Bonding, Structure and Organic Chemistry questions
- What is the electron configuration of a neutral sodium atom (atomic number 11), and what ion does it form?
- Why do solid ionic compounds like sodium chloride (NaCl) not conduct electricity, whereas molten or aqueous NaCl conducts readily?
- What type of bonding exists within a diamond crystal, and why does diamond have an exceptionally high melting point?
- Why does graphite conduct electricity whereas diamond does not, even though both are allotropes of pure carbon?
- What gas is produced when dilute hydrochloric acid reacts with calcium carbonate (marble chips)?
- According to collision theory, why does increasing the temperature of a reaction mixture increase the rate of reaction?