Question

Assertion :Specific gravity is dimensionless. Reason: Specific gravity is density of a substance measured w.r.t. density of water at $4^{\circ }C$.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
• C. Assertion is correct but Reason is incorrect.
• D. Assertion is incorrect but Reason is correct.

Answer 1

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

Specific gravity is the ratio of the mass of a solid or liquid to the mass of an equal volume of distilled water at $4^{o}C$ $\left(39F\right)$ or of a gas to an equal volume of air or hydrogen under prescribed conditions of temperature and pressure. As this is a relative quantity. So, it is dimensionless.