Question

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

(A) It forms an amphoteric oxide

(B) Its valency is three

(C) The formula of its chloride is ${\mathrm{XCl}}_3$

The correct statements(s) is/are

• A. only (A)
• B. only (B)
• C. (A) and (C)
• D. (A), (B) and (C)

Answer 1

The correct option is D

(A), (B) and (C)

Explanation of the correct answer:

The correct answer is option D:

• Aluminum (13), which produces amphoteric oxide and has the valency of 3, forms ${\mathrm{AlCl}}_3$.
• The substance is quite reactive. It is roughly one-third the density and rigidity of steel.
• Aluminium resists corrosion well.
• It has superconducting properties.
• There are several hydrogen isotopes with unidentified masses that range from twenty-one to forty-one.

Explanation of the incorrect answers:

Options A, B, and C:

1. All the statements given are correct.
2. Thus, these options are incorrect.

Hence, option D is correct, i.e., (A), (B), and (C)