The ozone layer absorbs: MCQ with Answer and Explanation

Explanation:
H₂SO₄ is used in production of fertilizers, detergents, dyes, explosives, petroleum refining, and many other chemicals. Its wide industrial use earns it the title. It's not the strongest (e.g., HClO₄ is stronger).

Explanation:
Soap is made by saponification using NaOH (for hard soap) or KOH (for soft soap). NaCl is used to precipitate soap; Na₂CO₃ is washing soda.

Explanation:
Turmeric contains curcumin, a natural indicator that is yellow in acidic/neutral and turns reddish-brown in basic medium. Soap solution is basic (pH ~9-10), thus the stain changes color. This is used as a test for basicity. Vinegar or lemon juice (acid) can reverse the color. Soap is alkaline due to hydrolysis.