Incorrect statement(s) with respect to hydrothermal treatment of paddy is/are:
Options:
(A) Process imparts hard texture to grain
(B) Retention of Vitamin B is less
(C) Cooking to the same degree of softness requires less time
(D) Bran obtained contains higher oil content
Official Answer Key:
B, C
Step-by-Step Solution & Explanation
Hydrothermal treatment of paddy (parboiling) involves soaking, steaming and drying before milling. Note the question asks which statements are wrong.
(A) Hard texture — CORRECT statement. Starch gelatinises and re-associates on drying, hardening the endosperm, sealing cracks and reducing breakage during milling. So (A) is not an answer.
(B) Vitamin B retention is less — INCORRECT. ✔ The opposite happens: during soaking and steaming, water-soluble B-vitamins migrate inward from the bran and aleurone into the endosperm, so parboiled rice retains more thiamine and niacin after milling. This nutritional advantage is the principal benefit of parboiling.
(C) Cooking requires less time — INCORRECT. ✔ The hardened, compact, gelatinised grain absorbs water more slowly, so parboiled rice needs more cooking time to reach the same softness.
(D) Bran has higher oil content — CORRECT statement. Oil migrates from the germ/aleurone into the bran layer during the treatment, which is why parboiled rice bran is preferred for rice-bran oil extraction. So (D) is not an answer.
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