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The chemical formula of common salt, used as the standard ionic example, is:
ANaOH
BNaNO
CNaCO
DNaCl
Answer & Solution
Correct answer: D. NaCl
1. It is made of sodium and chlorine.
2. One ion of each pairs up.
3. The formula is NaCl.
_Source: syllabus Science Class IX, Chapter 9, Atomic Foundations of Matter._
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