The alcohol used in antifreeze is: MCQ with Answer and Explanation

Explanation:
The chlor-alkali process electrolyzes concentrated NaCl solution (brine) to produce NaOH, Cl₂, and H₂. 2NaCl + 2H₂O → 2NaOH + Cl₂ + H₂. The mercury, diaphragm, or membrane cell can be used. Contact process is for H₂SO₄, Haber for NH₃, Ostwald for HNO₃.

Explanation:
Zymase (in yeast) converts sugars to ethanol, catalase (in liver) breaks down hydrogen peroxide, and amylase (in saliva) breaks down starch into sugars. All are biological enzymes that act as highly specific catalysts in biochemical reactions, functioning under mild conditions of temperature and pH.

Explanation:
Two reactants combine to form a single product, so combination (also called synthesis). No oxidation state change, so not redox. Decomposition is opposite.