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NEET 2004
Exam
NEET
Year
2004
Subject
Chemistry
Chapter
d and f Block Elements

NEET 2004 · Chemistry · d and f Block Elements

Among K, Ca, Fe and Zn , the element which can form more than one...

Among K,Ca,Fe\mathrm{K}, \mathrm{Ca}, \mathrm{Fe} and Zn\mathrm{Zn}, the element which can form more than one binary compound with chlorine is:

Options

  1. AFe\mathrm{Fe}
  2. BZn\mathrm{Zn}
  3. CK\mathrm{K}
  4. DCa\mathrm{Ca}

Correct answer

A. Fe\mathrm{Fe}

Step-by-step solution

Metal ions having variable oxidation number can form more than one types of binary compound. Fe shows +2,+3+2,+3 oxidation states. Thus, it can form FeCl3,FeCl2\mathrm{FeCl}_3, \mathrm{FeCl}_2. Related Theory Binary compounds are chemical compounds comprising of two distinct elements. For example, water, calcium chloride etc. Caution Zn\mathrm{Zn}, even being a transition metal shows only +2 oxidation state, due to fully filled 3d3 d subshell.
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