Multiple choice

Common salt, NaCl, is an example of

  1. molecular crystals

  2. covalent crystals

  3. metallic crystals

  4. ionic crystals
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The ionic crystals consist of positively and negatively charged ions arranged in a regular fashion throughout the crystal. They form a network of positive and negative ions in three dimension in such a way that cations and anions occupy alternate sites. These are held together by strong electrostatic forces.Common examples of ionic crystals are, salts like NaCl, KNO3, LiF etc. 

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