**Assertion (A):** Specific gravity of a substance is a dimensionless quantity. <br>**Reason (R):** — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question
Question
**Assertion (A):** Specific gravity of a substance is a dimensionless quantity. <br>**Reason (R):** It is the ratio of the density of the substance to the density of water.
Answer: A
💡 Solution & Explanation
Specific gravity is a ratio of two identical units ($\text{g/cm}^3 / \text{g/cm}^3$), which causes the units to cancel out, leaving a pure number.
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