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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 2. |
Navolac on heating with HCHO gives : |
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Answer» MELAMINE FORMALDEHYDE POLYMER |
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| 3. |
Nature of dispersion medium colloids classified on the basis ? |
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Answer» Solution :CLASSIFICATION on the BASIS of NATURE of dispersion medium. Depending upon the nature of the dispersion medium, the COLLOIDAL solutions are classified as: (i) Aquasol or hydrosol : when dispersion medium is water. (ii) Alcosol : when dispersion medium is alcohol. (iii) Benzosol : when dispersion medium is benzene. (IV) Aerosol : when dispersion medium is air. |
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| 4. |
Nature of aqueous solutions of two different amino acids X and Y are acidic and basic. Now X and Y are. |
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Answer» ALANINE and Valine |
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| 5. |
Nature of aqueous solutions of two different amino acids X and Y are acidic and basic. Now X and Yare |
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Answer» ALANINE and Valine |
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| 6. |
Naturally ozone is prepared from |
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Answer» OXYGEN by free radical mechanism |
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| 7. |
Naturally occurring boron contain of two isotopes, whose atomic masses are 10.01 and 11.01. the atomic mass of natural boron is 10.81. calculate the percentage of each isotope in natural boron. |
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Answer» `(10.01xx x)/(100)+(11.01(100-x))/(100)=10.81` or `x=20` |
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| 8. |
Naturally occurring Boron consists of two isotopes whose atomic masess are 10.01 and 11.01. The atomic mass of natural Boron is 10.81. Calculate the percentage of each isotope in natural Boron. |
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Answer» SOLUTION :Suppose the PERCENTAGE of isotope with atomic mass `10.01=x` Then percentage of isotope with atomic mass `11.01=100-x` `therefore" Average atomic mass"=(10.01x+(100-x)xx11.01)/(100)=(10.01x+1101-11.01x)/(100)=(1101-x)/(100)` `therefore""(1101-x)/(100)=10.81"(GIVEN)or"1101-x=1081"or"x=1101-1081=20` `therefore""%" AGE of isotope with atomic mass 10.01"=20%` `""%" age of isotope with atomic mass 11.01"=80%` |
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| 9. |
Naturally occuring substances from which a metal can be profitably (or economically ) extracted are called _________. |
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Answer» minerals |
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| 10. |
Naturally occurring alphaaminoacid, histidine is_____in nature |
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Answer» Acidic |
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| 11. |
Natural sweeteners, e.g., sucrose add to calorie intake and therefore many people prefer to use artificial sweeteners. Ortho-sulphobenzimide, also called saccharin, is the first popular artificial sweetening agent. It has been used as a sweetening agent ever since it was discovered in 1879. It is about 550 times as sweet as cane sugar. It is excreted from the body in urine unchanged. It appears to be entirely inert and harmless when taken. Its use is of great value to diabetic persons and people who need to control intake of calories. Aspartame is the most successful and widely used artificial sweetener. It is roughly 100 times as sweet as cane sugar. It is methyl ester of dipeptide formed from aspartic acid and phenylalanine. Use of aspartame is limited to cold foods and soft drinks because it is unstable at cooking temperature. Alitame is high potency sweetener, although it is more stable than aspartame, the control of sweetness of food is difficult while using it. Sucralose is trichloro derivative of sucrose. Its appearance and taste are like sugar. It is stable at cooking temperature. It does not provide calories. What is the chemical composition of aspartame ? |
| Answer» Solution :It is the METHYL ESTER of dipeptide formed form aspartic ACID and PHENYLALANINE. | |
| 13. |
Natural sweeteners, e.g., sucrose add to calorie intake and therefore many people prefer to use artificial sweeteners. Ortho-sulphobenzimide, also called saccharin, is the first popular artificial sweetening agent. It has been used as a sweetening agent ever since it was discovered in 1879. It is about 550 times as sweet as cane sugar. It is excreted from the body in urine unchanged. It appears to be entirely inert and harmless when taken. Its use is of great value to diabetic persons and people who need to control intake of calories. Aspartame is the most successful and widely used artificial sweetener. It is roughly 100 times as sweet as cane sugar. It is methyl ester of dipeptide formed from aspartic acid and phenylalanine. Use of aspartame is limited to cold foods and soft drinks because it is unstable at cooking temperature. Alitame is high potency sweetener, although it is more stable than aspartame, the control of sweetness of food is difficult while using it. Sucralose is trichloro derivative of sucrose. Its appearance and taste are like sugar. It is stable at cooking temperature. It does not provide calories. What is the advantage of using sucrolose ? |
| Answer» SOLUTION :It works at COOKING temperatures also does not PROVIDE CALORIES. | |
| 14. |
Natural uranium consists of .^(235)U: |
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Answer» 0.99 |
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| 15. |
Natural sweeteners, e.g., sucrose add to calorie intake and therefore many people prefer to use artificial sweeteners. Ortho-sulphobenzimide, also called saccharin, is the first popular artificial sweetening agent. It has been used as a sweetening agent ever since it was discovered in 1879. It is about 550 times as sweet as cane sugar. It is excreted from the body in urine unchanged. It appears to be entirely inert and harmless when taken. Its use is of great value to diabetic persons and people who need to control intake of calories. Aspartame is the most successful and widely used artificial sweetener. It is roughly 100 times as sweet as cane sugar. It is methyl ester of dipeptide formed from aspartic acid and phenylalanine. Use of aspartame is limited to cold foods and soft drinks because it is unstable at cooking temperature. Alitame is high potency sweetener, although it is more stable than aspartame, the control of sweetness of food is difficult while using it. Sucralose is trichloro derivative of sucrose. Its appearance and taste are like sugar. It is stable at cooking temperature. It does not provide calories. Why is it difficult to control the sweeteners of food with alitame ? |
| Answer» Solution :This is because its SWEETNESS level COMPARED to sugar is very high. Its value is 2000. EVEN a small change in the amount of this sweetener is GOING to change the sweetness level of food to a great extent. | |
| 16. |
Natural sweeteners, e.g., sucrose add to calorie intake and therefore many people prefer to use artificial sweeteners. Ortho-sulphobenzimide, also called saccharin, is the first popular artificial sweetening agent. It has been used as a sweetening agent ever since it was discovered in 1879. It is about 550 times as sweet as cane sugar. It is excreted from the body in urine unchanged. It appears to be entirely inert and harmless when taken. Its use is of great value to diabetic persons and people who need to control intake of calories. Aspartame is the most successful and widely used artificial sweetener. It is roughly 100 times as sweet as cane sugar. It is methyl ester of dipeptide formed from aspartic acid and phenylalanine. Use of aspartame is limited to cold foods and soft drinks because it is unstable at cooking temperature. Alitame is high potency sweetener, although it is more stable than aspartame, the control of sweetness of food is difficult while using it. Sucralose is trichloro derivative of sucrose. Its appearance and taste are like sugar. It is stable at cooking temperature. It does not provide calories. What is the chemical name of saccharin ? |
| Answer» SOLUTION :It is ortho-sulphobenzimide. | |
| 17. |
Natural sweeteners, e.g., sucrose add to calorie intake and therefore many people prefer to use artificial sweeteners. Ortho-sulphobenzimide, also called saccharin, is the first popular artificial sweetening agent. It has been used as a sweetening agent ever since it was discovered in 1879. It is about 550 times as sweet as cane sugar. It is excreted from the body in urine unchanged. It appears to be entirely inert and harmless when taken. Its use is of great value to diabetic persons and people who need to control intake of calories. Aspartame is the most successful and widely used artificial sweetener. It is roughly 100 times as sweet as cane sugar. It is methyl ester of dipeptide formed from aspartic acid and phenylalanine. Use of aspartame is limited to cold foods and soft drinks because it is unstable at cooking temperature. Alitame is high potency sweetener, although it is more stable than aspartame, the control of sweetness of food is difficult while using it. Sucralose is trichloro derivative of sucrose. Its appearance and taste are like sugar. It is stable at cooking temperature. It does not provide calories. What is the utility of sweeteners in general ? |
| Answer» Solution :Sweeteners are of GREAT VALUE to diabetic PERSONS and PEOPLE who need to control intake of calories. | |
| 18. |
Natural silk fibre is |
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Answer» polyester |
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| 19. |
Natural silk is a |
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Answer» polyester |
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| 20. |
Natural silk is |
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Answer» polyester |
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| 21. |
Natural silk and artificial silk differ in one respect that one of them contains: |
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Answer» N |
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| 22. |
Natural rubber or raw rubber consists of basic material latex which is a dispersion of isoprene .During the treatement this isoprene forms a high molecular wiehg polymer of isoprene. Naturalrubber can be obtained from five hundred different species of plants. Consider the following properties of rubber , (i) Tensils strength of vulcanised rubber is almost ten times more than raw rubber . (ii) Elasticity of raw rubber is very high . Choose the correct option . |
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Answer» (i) is TRUE (II) is FALSE. |
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| 23. |
Natural rubber or raw rubber consists of basic material latex which is a dispersion of isoprene .During the treatement this isoprene forms a high molecular wiehg polymer of isoprene. Naturalrubber can be obtained from five hundred different species of plants.Which rubber is not polydiene ? |
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Answer» Polyisoprene |
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| 24. |
Natural rubber or raw rubber consists of basic material latex which is a dispersion of isoprene .During the treatement this isoprene forms a high molecular wiehg polymer of isoprene. Naturalrubber can be obtained from five hundred different species of plants. In the isoprene polymer all the isoprene have |
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Answer» trans-1,4 CONFIGURATION |
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| 25. |
Natural rubber on ozonolysis gives |
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Answer» 4-oxopentanal |
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| 26. |
Natural rubber obtained from rubber latex is soft and sticky Suggest a method to improve the stiffness of rubber |
| Answer» SOLUTION :Vuclanisation | |
| 27. |
Natural rubber obtained from rubber latex is soft and sticky Explain the above method |
| Answer» Solution :RUBBER is heated with sulphur such that sulphur CROSS links are introduced in polymetric chain. Vuclanisation IMPROVES elasticity, reduce WATER absorption tendency and increases RESISTANCE to oxidation | |
| 28. |
Natural rubber obtained from rubber latex is soft and sticky Classify the following into natural and synthetic polymers: Nylon, starch, cellulose, PVC |
| Answer» Solution :Cellulose, starch - Natural POLYMERS, Natural polymers, NYLON, PVC-Synthetic polymers. | |
| 29. |
Natural rubber is prepared from ? |
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Answer» All trans POLYISOPRENE |
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| 30. |
Natural rubber is polymer is |
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Answer» `CH_2=CH-Cl` |
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| 31. |
Natural rubber is manufactured from_______which is a colloidal dispersion of rubber in water. |
| Answer» SOLUTION :RUBBER LATEX | |
| 32. |
Natural rubber is ...................but gutta percha is ..................... |
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Answer» |
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| 33. |
Natural rubber is basically of or the monomer of natural polymer rubber is |
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Answer» Neoprene |
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| 34. |
Natural rubber is also called as |
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Answer» cis-1, 4-polyisoprene |
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| 35. |
Natural rubber is a polymer of which of the following ? |
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Answer» Chloroprene |
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| 36. |
Natural rubber is all cis polymer o fisoprene, what is the name of all trans polymer of same monomer ? |
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Answer» Neoprene |
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| 37. |
Natural rubber is a polymer of isoprene(2-methylbuta-1, 3-diene). If natural rubbber is treated with O_(3) followed by Zn/H_(2)O, the final product will be |
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Answer»
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| 38. |
Natural rubber is a polymer of (or) the monomer of natural polymer rubber is |
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Answer» BUTADIENE |
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| 39. |
Natural rubber is a polymer of acrylonitrile.true ot false |
| Answer» SOLUTION :ISOPRENE is a NATURAL RUBBER. | |
| 40. |
Natural rubber is a polymer of |
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Answer» Chloroprene |
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| 41. |
Natural rubber is a polymer of: |
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Answer» STYRENE |
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| 44. |
Natural rubber is a polymer of .................... |
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Answer» |
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| 45. |
Natural rubber is a polymer derived from: |
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Answer» Propylene |
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| 46. |
Natural rubber is a polymerderivedfrom : |
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Answer» butandiene |
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| 47. |
Natural rubber is a linear polymer of which monomer ? |
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Answer» NEOPRENE |
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| 48. |
Natural rubber is a |
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Answer» trans-polyisoprene |
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| 49. |
Natural rubber is: |
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Answer» All-trans polyisoprene |
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| 50. |
Natural rubber is |
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Answer» A polumer of 1,3-butadiene |
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