Question

Consider the following statements about an element ‘X’ with number of protons 13.

1. It forms amphoteric oxide
2. Its valency is three
3. The formula of its chloride is XCl₃

The correct statements(s) is/are:

Options

• only (A)

• only (B)

• (A) and (C)

• (A), (B) and (C)

Answer 1

(A), (B) and (C)

Explanation:

X is aluminium (atomic number 13). Aluminium commonly has valency +3 and forms AlCl₃, and its oxide Al₂O₃ is amphoteric (reacts with both acids and bases).