Description : Mention the differences between fats and oils.
Last Answer : Fats Fats are mostly saturated Oils Oils are mostly unsaturated They are solids at room temperature They are liquids at room temperature They are chemically inactive They are chemically reactive They ... slowly It is easy to transport They are digested fast It is difficult to transport
Description : Consider the following statements: 1. Mercury metal exists as a liquid at room temperature. 2. The property of metals by which they can be beaten into thin sheets is called malleability 3. Neutral fats such as butter and vegetable oils ... b) 1, 3 and 4 only (c) 2, 3 and 4 only (d) 1, 2 and 3 only
Last Answer : Ans:(d)
Description : Oils and fats are obtained from (a) Animal sources (b) Vegetable sources (c) Synthesis (d) Both animal and vegetable sources
Description : Oils and fats are (a) Glyceryl esters of higher fatty acids (b) Acetyl esters of higher fatty acids (c) Ethyl esters of fatty acids (d) Methyl esters of fatty acids
Last Answer : Ans:(a)
Description : The process of neutralizing the fatty acids present in the oils or fats by adding sodium
Last Answer : hydroxide is called saponification.
Description : How are fats and oils formed?
Last Answer : When fatty acids react with glycerol, fats and oils are formed. Fatty acid + Glycerol Esterification Fat/oil + Water
Description : What is the indicator for fats oils and waxes?
Last Answer : Need answer
Description : What compound make up fats and oils?
Description : Which one of the following forms the base of vegetable fibres? (1) Cellulose (2) Proteins (3) Fats (4) Oils
Last Answer : (1) Cellulose Explanation: The principal chemical component of vegetable fibers is cellulose, with varying amounts of lignin and hemicelluloses also usually present; thus, the fibers are also ... bagasse, and banana. Vegetable fibers are usually stiffer but less tough than synthetic fibers.
Description : Drying oils contain a fairly large proportion of – (1) fats (2) proteins (3) saturated fatty acids (4) unsaturated fatty acids
Last Answer : (4) unsaturated fatty acids Explanation: They contain a high percentage of "polyunsaturates" (polyunsaturated fatty acids). Most drying oils owe their drying properties to the presence of a large percentage of linolenic acid (which derives its name from "linseed"), which is highly unsaturated.
Description : The main cause of rancidity in of fats and foods is the oils - (1) hydrolysis (2) oxidation (3) clarification (4) reduction
Last Answer : (2) oxidation Explanation: Rancidity in foods is due to the complete or incomplete oxidation or hydrolysis of fats and oils when exposed to air light, moisture or by bacterial action, resulting in unpleasant taste and odor.
Description : Saponification involves the hydrolysis of fats and oils by- (1) water (2) washing soda (3) stearic acid (4) caustic soda
Last Answer : (4) caustic soda Explanation: Caustic soda (sodium hydroxide) is a versatile alkali. Its main uses are in the manufacture of pulp and paper, alumina, soap and detergents, petroleum products and chemical production.
Description : Chemically fats and oils are: (1) Triesters (2) Amines (3) Aldehydes (4) Ketons
Last Answer : (1) Triesters Explanation: Fats and oils are called triglycerides (or triacylcylgerols) because they are esters composed of three fatty acid units joined to glycerol, a trihydroxy alcohol. Fats and oils are composed of molecules known as triglycerides, which are esters.
Description : Which gas is used for converting vegetable oils into saturated fats? (1) H2 (2) O2 (3) Cl2 (4) SO2
Last Answer : (1) H2 Explanation: Hydrogenation - to treat with hydrogen - is a chemical reaction between molecular hydrogen (H2) and another compound or element, usually in the presence of a catalyst. ... oils are derived from polyunsaturated fatty acids (containing more than one carbon-carbon double bonds).
Description : Fats and oils:
Last Answer : Fats are soft and greasy at ordinary temperatures, whereas fixed oils—as distinct from essential oils and petroleum—are liquid.
Description : Write a note on fats and oils?
Last Answer : i) They are composed of carbon, hydrogen and fats. ii) A fat molecule has two parts glycerol and fatty acids. iii) The fatty acids are of two types: - a. Unsaturated fatty acids are ... double energy as compared to carbohydrates and proteins. vi) One gram fats release 9.1 Kilo Cal energy.
Description : Which of the following statements is not true about triacylglycerols? (a) When solids and semisolids at room temperature, they are called fats. (b) When liquids at room temperature, they are ... low melting points are composed of saturated fatty acids, causing them to be liquids at room temperature
Last Answer : Triacylglycerols with low melting points are composed of saturated fatty acids, causing them to be liquids at room temperature
Description : Which of the following compounds will not be classified as lipids? (a) Fats (b) Waxes (c) Soaps (d) Oils
Last Answer : Waxes
Description : Alkaline hydrolysis of oils (or fats) is called : (a) Saponification (b) Fermentation (c) Diazotization (d) Rancidification
Last Answer : Saponification
Description : Liquid oils can be converted to solid fats by (a) Hydrogenation (b) Saponification (c) Hydrolysis (d) Oxidation of double bonds
Last Answer : Hydrogenation
Description : Fats and oils are (a) monoesters of glycerol (b) diesters of glycerol (c) triesters of glycerol (d) diesters of glycol
Last Answer : triesters of glycerol
Description : Oils and fats are converted to soap in a process called (A) Hydrogenation (B) Esterification (C) Saponification (D) None of these
Last Answer : (C) Saponification
Description : The basic difference between vegetable oils and fats is in their (A) Density (B) Chemical properties (C) Physical state (D) Composition
Last Answer : (C) Physical state
Description : Pick out the wrong statement. (A) Pasteurisation of milk involves moderate heating followed by cooling (B) Bakeries and breweries make use of yeasts (C) Enzyme is a complex nitrogenous compound (D) Oils and fats are alkaloids
Last Answer : (D) Oils and fats are alkaloids
Description : Fats as compared to oils have (A) More unsaturated glycerides of fatty acids (B) Less unsaturated glycerides of fatty acids (C) Much higher reactivity to oxygen (D) Lower melting point
Last Answer : (B) Less unsaturated glycerides of fatty acids
Description : Vegetable oils and fats basically differ in their (A) Density ranges (B) Physical state (C) Chemical composition (D) Chemical properties
Last Answer : (B) Physical state
Description : Fats and oils contain ____ times more energy than proteins and carbohydrates. a. 2.25 c. 1.5 b. 2 d. 3
Last Answer : a. 2.25
Description : Glycerine and what other substance are made by heatin animal fats or vegetable oils with sodium hydroxide?
Last Answer : ANSWER: SOAP
Description : One of the following is NOT a lipid. Is it: w) fats and oils x) starches y) steroids z) waxes
Last Answer : ANSWER: X -- STARCHES
Description : Neutral fats, oils and waxes may be classified as: a) lipids b) carbohydrates c) proteins d) none of the above
Last Answer : ANSWER: A -- LIPIDS
Last Answer : Cellulose
Description : Drying oils contain a fairly large proportion of (1) fats (2) proteins (3) saturated fatty acids (4) unsaturated fatty acids
Last Answer : unsaturated fatty acids
Description : Which gas is used for converting vegetable oils into saturated fats ? (1) H2 (2) O2 (3) Cl2 (4) SO2
Last Answer : H2
Description : Mention the economic importance of fishes.
Last Answer : a) Fishes form food for humans in many countries. b) Oil obtained from the liver of shark and cod is rich in vitamin A and D. c) The dried skin of sharks is used in making polish. d) Fishes like Gambusia are used in biological control of mosquitoes.
Description : Mention the economic importance of pteridophytes/ferns.
Last Answer : a) Ferns are grown for their ornamental value. b) Leaves of pteridophytes are used in making flower bouquet. c) Some ferns are of medicinal importance. d) Some ferns like horse-tail and club mosses are involved in the formation of fossil fuels like coal and petroleum.
Description : Mention the economic importance of multicellular algae.
Last Answer : a) Some species of algae are used as cattle feed. b) Algin, a substance obtained from brown algae is used in preparation of ice creams and chocolates. c) Agar, a substance obtained from ... purification of water. f) Laminaria, a brown algae is used in the production of potassium and iodine.
Description : What is the importance of agriculture in India ? Mention two factors. -Geography
Last Answer : Importance of agriculture: (i) About 70% of the working population of India is directly involved in agriculture. (ii) Agriculture provides about a third of India’s national income.
Description : (i) Mention two reasons for the importance of the cotton textile industry. (ii) Mention one reason responsible for its poor performance. -Geography
Last Answer : (i) Two reasons for the importance of the cotton textile industry. (1) Directly or indirectly 2 crore people which is nearly 40% of the whole country's labour force depend on this ... due to inadequate supply of good quality raw material and outdated machinery which lead to its poor performance.
Description : Mention two reasons for the importance of the Electronic industry in India’s development. -Geography
Last Answer : Two reasons for the importance of electronic industry in India's development are : (i) It has largely contributed to space technology, communication, information technology and software industry. ... world. (ii) It has helped medical sciences and defence to develop with electronic apparatus.
Description : State the importance of petroleum as an energy resource. Mention any four oil fields of India. -SST 10th
Last Answer : Petroleum is the next major energy source in India after coal. Petroleum provides fuel for heat and lighting, lubricants for machinery and raw materials for number of manufacturing industries - synthetic textiles, ... High. (ii) Ankeleshwar, Gujarat. (iii) Digboi, Assam. (iv) Bassien, Arabina Sea.
Description : Mention the importance of water transport. Name three National Waterways of our country. -SST 10th
Last Answer : (i) Waterways are the cheapest means of transport. (ii) They are most suitable for carrying heavy and bulky goods. (iii) It is a fuel-efficient and environment friendly mode of transport. The ... West-Coast Canal in Kerala (Kottapurma-Komman, Udyogamandal and Champakkara canals-205 km)-N.W. No. 3
Description : Mention the importance of tourism as a trade. Or What is the importance of tourism? -SST 10th
Last Answer : Our country earns foreign exchange through tourism. More than 15 million people are directly engaged in the tourism industry. Tourism has proved itself as one of the most important aspects of trade. ... of foreign exchange in the year 2004.Over 2.6 million foreign tourists visit India every year.
Description : Mention some factors relating to the importance of agriculture. -SST 10th
Last Answer : (i) Agriculture is the prominent occupation of the people. (ii) Agricultute supports the principal manufacturing industries with raw materials. (iii) Several agricultural products are important items of our export trade. (iv) Agriculture is the major source of national income.
Description : Mention two reasons for the importance of the Electronic industry in India’s development. -SST 10th
Last Answer : Electronic industry is important for India's development: (i) Electronic industry is a fast growing industry. It started with radio manufacturing and now has entered in almost all the fields such as, ... industry in various fields. (ii) Indian hardware and software is in great demand in the world.
Last Answer : During the great liberation war there was no advanced communication system or technology like now. It took a lot of hard work to get a little communication and in the end it was doubtful to be ... sank the ship in a violent explosion. In this way a small signal was given with great difficulty.
Description : Mention the importance of Environmental studies
Last Answer : ⮚ The air we breathe, the water we drink, the food we consume and the land we live on are all contaminated by the industrial activities. ⮚ There is no zero pollution ... environmental studies, people will understand the concept of "Need of development without destruction of environment".
Description : Mention the economic importance of Solanaceae.
Last Answer : Ans: 1. Stem tubers of Solanum tuberosum, fruits of Solanum melongena, Capsicum, Lycopersicon are used as vegetables. 2. Capsicum powder is used as spices and dried chillies are used as condiments. 3 ... . 6. Species of Cestrum and Petunia are ornamentals. 7. Fruits of Physalis are edible.
Description : The metal that is used as a catalyst in the hydrogenation of oils is (a) Ni (b) Pb (c) Cu (d) Pt
Description : A fractionating column is a glass apparatus used to (a) Separate magnetic solids from nonmagnetic solids (b) Separate a mixture in water (c) Separate two or more liquids (d) Extract oils from vegetable matter
Last Answer : Ans:(c)
Description : Exposure to sunshine and diet rich in fish liver oils, oatmeal and sweet potatoes will not cause the deficiency disease 1. Osteomalacia 2. Osteoporosis and frequent bone fractures 3. Rickets 4. Fatty liver (a) 1, 2 (b) 1, 2, 3 (c) 1, 3 (d) 1, 2, 3, 4
Last Answer : Ans:(b)