Gelatin, a very important raw material for preparation of photographic emulsion, is a by-product of which of the following?
A
Chicken
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B
Forest
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C
Fish
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D
Cattle
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Solution
The correct option is D Cattle Gelatin is a protein obtained by boiling skin, tendons, ligaments and bones with water. It is usually obtained from cows and pigs. Gelatin is used in shampoos, face masks and other cosmetics; as a thickener for fruit gelatins and puddings; in jellies, candles, marshmallows, cakes, ice cream and yogurts; on photographic film and in vitamins as a coating and as capsules. It is sometimes used for clearing wines.