41: Aspartame is an artificial sweetener sold in the market. It consists of amino acids and provides calories like other amino acids. Yet, it is used as a low-calorie sweetening agent in food items. What is the basis of this use ?
(a) Aspartame is several times sweeter than table "sugar, hence food items made with small quantities of aspartame yield fewer calorieson oxidation
(b) When aspartame is used in food processing, the sweet taste remains, but it 'beccmes resistant to oxida- tion
(c) Aspartame is as sweet as sugar, but after ingestion into the body, it is converted into metabolites that yield no calories
(d) Aspartame is as sweet as table sugar, but unlike table sugar, it is not readily oxidized in human body due to lack of requisite enzymes
Explanation:
Aspartame is an artificial, non-saccharide sweetener used as a sugar substitute in some foods and beverages. It is approximately 200 times sweeter than sucrose, or table sugar. Due to this property, even though aspartame produces four kilocalories of energy per gram when metabolized, the quantity of aspartame needed to produce a sweet taste is so small that its caloric contribution is negligible.
42: Consider the following statements:
1. Anhydrous sodium carbonate is commonly known as baking soda.
2. Baking soda is used in fire extinguishers.
3. Bleaching power is manufactured in Hasenclever plant.
Which of the following statements given above is/are correct?
(a) 1 and 2
(b) 2 and 3
(c) 3 only
(d) 1, 2 and 3
Explanation:
Sodium hydrogen carbonate (NaHCO,3) is called baking soda. It is used in fire extinguishers. 'Soda acid Fire-extinguishers' contains a solution of baking soda and H,2SO,4 which release CO,2 to help put out the fire.
Hesenclever plant in Germany produces Bleaching powder.
43: Most of the explosions in mines occur due to the mixing of
(a) hydrogen with oxygen
(b) oxygen with acetylene
(c) methane with air
(d) carbon dioxide with ethane
Explanation:
Most of the explosions in mines occur due to the mixing of methane and air.
44: Poison glands of snakes are homologous to
(a) electric organs of fishes
(b) stings of rays
(c) sebaceous glands of mammals
(d) salivary glands of vertebrates
45: Which of the following is the correct group of Kharif crops?
(a) Rice, Millet, Maize, Cotton
(b) Groundnut, Bajra, Barley, Sorghum, Wheat
(c) Jowar, Bajra, Rice, Cotton, Jute, Gram
(d) Wheat, Barley, Gram, Mustard