What is the general formula of the halid

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Target Exam

CUET

Subject

Chemistry

Chapter

Inorganic: D and F Block Elements

Question:

What is the general formula of the halides formed by lanthanoids?

Options:

MX₂

MX₃

MX₄

None of these

Correct Answer:

MX₃

Explanation:

The general formula of the halides formed by lanthanoids is MX₃.

The anhydrous halides MX₃can be made by heating the metal and halogen or by heating the oxide with appropriate ammonium halide.

Ln₂O₃ + NH₄Cl → LnCl₃ + 6NH₃ + 3H₂O