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Element X forms a chloride with the formula XCl₂ , which is a solid with high melting point. X would most likely be in the same group of periodic table as

Options

  1. ANa
  2. BAl
  3. CMg
  4. DK

Correct answer

C. Mg

Step-by-step solution

The formula of the chloride is XCl₂ , which indicates that the valency of element X is 2. Among the given options: Na belongs to Group 1 and has a valency of 1, forming NaCl . Al belongs to Group 13 and has a valency of 3, forming AlCl₃ . Mg belongs to Group 2 and has a valency of 2, forming MgCl₂ . K belongs to Group 1 and has a valency of 1, forming KCl . Since X forms a chloride with the formula XCl₂ and is a solid with a high melting point (characteristic of ionic chlorides of Group 2 metals), X would most like

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