Which statements about aluminium are correct? 1 It is more reactive than calcium. 2 The main ore of aluminium is bauxite. 3 It can be extracted from its oxide using carbon. 4 Brass is an alloy of aluminium and copper.
A.
B.
C.
D.
Exam No：0620_s25_qp_11 Year：2025 Question No：27
Answer:
C
Knowledge points:
6.3.1. State that some chemical reactions are reversible as shown by the symbol ⇌
Solution:
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