Which plastic is used for making electrical switches and handles of utensils?
A. Bakelite
B. Teflon
C. Polythene
D. PVC
Answer: Option A
Solution (By JKExamLibrary)
Bakelite is a thermosetting plastic, heat resistant and electrical insulator. Polythene and PVC are thermoplastics; they soften on heating. Teflon is non-stick.
Explanation:
Esterification is the chemical reaction where a carboxylic acid reacts with an alcohol in the presence of a strong acid catalyst (like conc. H₂SO₄) to produce an ester and water. Saponification is the reverse process, involving the alkaline hydrolysis of esters to form soap and glycerol.
Explanation:
(NH₄)₂SO₄ contains 21% nitrogen and 24% sulfur. Both are plant nutrients. It is a straight nitrogenous fertilizer with sulfur as secondary nutrient. It is especially useful for sulfur-deficient soils.
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