Question

(1) To what colour does dilute iodine solution change when 2-3 drops of it are poured on wheat flour ? (2) In which two main forms are carbohydrates found in our food ? (3) Which component of our food gives us double or more energy as compared to the same amount of carbohydrates ? ( 4 ) Foods containing which nutrients are often called 'body building foods'? (5) Which component of our food helps in protecting our body against diseases ? (6) Which Vitamin is found in abundance in gooseberry (Amla)? (7) Which Vitamin is produced in our body in the presence of sunlight? (8) Which Vitamin is not present in milk?​

Answer 1

ANSWER:-

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1.)It will turn into blue black colour. This will indicate the presence of carbohydrates present in the wheat flour.

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2.)The two main forms of carbohydrates are sugars (such as fructose, glucose, and lactose) and starches, which are found in foods such as starchy vegetables, grains, rice, breads, and cereals. The body breaks down (or converts) most carbohydrates into the sugar glucose, which is absorbed into the bloodstream.

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3.)Fats are the slowest source of energy but the most energy-efficient form of food. Each gram of fat supplies the body with about 9 calories, more than twice that supplied by proteins or carbohydrates. Because fats are such an efficient form of energy, the body stores any excess energy as fat.

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4.)proteins are often called 'body building foods' (Fig 2.5). Vitamins help in protecting our body against diseases. Vitamins also help in keeping our eyes, bones, teeth and gums healthy.

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5.)Vitamins help in protecting our body against diseases. Vitamins also help in keeping our eyes, bones, teeth and gums healthy. Vitamins are of different kinds known by different names. Some of these are Vitamin A, Vitamin C, Vitamin D, Vitamin E and K.

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6.)VITAMIN-C

Amla or the Indian gooseberry is a fruit which is popular for its many health benefits. The fruit is extremely rich in Vitamin C, iron and calcium.

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7.)Vitamin D3 (cholecalciferol) is synthesized in the skin by the reaction of 7-dehydrocholesterol with UVB radiation, present in sunlight with an UV index of three or more. Vitamin D4 is an analog scientifically known as 22-dihydroergocalciferol.

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8.)Vitamin C

for example cannot be found in milk. Vitamin C is mostly found in citrus fruits. However, milk is rich in Vitamin A, B12, Calcium and thiamin, riboflavin .