65.(i) Streptomycin, (ii) Morphine, (iii) L.S.D. are which type of drugs?
(i)Streptomycin is an antibiotic drug. (ii) Morphine is an analgesic and narcotic drug. (iii) Lysergic acid diethylamide (L.S.D) known as a psychedelic drug.
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66.
What do you mean by food preservation?
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67.
What does sodium benzoate actually do when it is mixed with fruit juices or squash?
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68.
Name one acid preservative used to preserve the food.
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69.
Why does 70% sugar syrup act as a preservative?
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70.
Name one chemical which preserves colourless fruit juices.
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