Science Question 10

QUESTION


What is the difference in energy content of raw and boiled rice?


ANSWER: 


The energy content of raw rice is 3620 cal/kg with 12 per cent water content whereas that of boiled (cooked) rice is 1098 cal/kg with 73 per cent water content. Another variety is known as parboiled rice. Parboiling is a hydrothermal treatment followed by drying before milling for the production of milled parboiled grain.


During parboiling, the B vitamins and minerals from hulls, bran and germ will be leached into endosperm and hence loss during polishing is minimised. The energy content of parboiled raw rice is 3703 cal/kg with 10 per cent water content whereas that of boiled (cooked) parboiled rice is 1057 cal/kg with 73 per cent water content .


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