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Question

_______ compound is not an ionic compound.


A

Lithium chloride

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B

Ammonium chloride

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C

Calcium chloride

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D

Carbon tetrachloride

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Solution

The correct option is D

Carbon tetrachloride


  • Metals are the ones that are electropositive in nature and have the tendency to lose electrons and form cations (positively charged species). On the other hand, nonmetals are the ones that are electronegative in nature and have the tendency to gain electrons and form anions (negatively charged species).
  • The compound in which bonds are formed from the electrostatic interaction between a cation and an anion is termed as ionic compound. These compounds dissociate in water to liberate their constituent ions.
  • The compound in which bonds are formed due to sharing of electrons is called covalent compounds.
  • Since Carbon tetrachloride CCl4is formed from two nonmetals, Carbon C and ChlorineCl, by sharing the electrons. Therefore, it cannot be categorized as an ionic compound.

A

  • Since Lithium chloride LiCl is formed from metal, Lithium Li, which forms the Lithium cation (Li+), and nonmetal Chlorine, which forms the Chloride anion (Cl-), it is classified as an ionic compound.
  • Lithium chloride LiCl dissociates in the aqueous solution to form Lithium ion Li+ and Chloride ion Cl-.

LiClaqLi+aq+Cl-aq

B

  • Since Ammonium chloride NH4Cl dissociates in water to form Ammonium ion NH4+ and Chloride ion, it is classified as an ionic compound.

NH4ClaqNH4+aq+Cl-aq

C

  • Since Calcium chloride CaCl2 is formed from the interaction between metal, Calcium Ca, which forms the Calcium cation Ca2+, and nonmetal Chlorine, which forms the Chloride anion (Cl-), it is classified as ionic compounds.
  • Calcium chloride CaCl2 dissociates in the aqueous solution to form Calcium ion Ca2+ and Chloride ionCl-.

CaCl2aqCa2+aq+2Cl-aq

Hence, option D is correct. Carbon tetrachloride is not an ionic compound.


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