| Coverage : The GEd Practice Test - Science - Chemistry has been designed to test the concepts of the test taker in one of the main branches of science, namely Chemistry. This test covers topics like, structure of matter, compounds and equations, periodicity of elements, behavior of matter etc. |
| 1. | What is a Diamond? |
| a. | | An ore |
| b. | | A fossil |
| c. | | A sedimentary solid |
| d. | | A mineral
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| 2. | What is Cellulose nitrate? |
| a. | | Natural plastic |
| b. | | Synthetic plastic |
| c. | | Synthetic thermoplastic |
| d. | | Synthetic thermosetting plastic
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| 3. | Nylon 6.6 is first prepared by |
| a. | | W. Carothers |
| b. | | C. Goodyear |
| c. | | L. Pauling |
| d. | | E.G. Rochow
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| 4. | A polymer can be obtained from a dialcohol and a diacid which are a typical: |
| a. | | Synthetic rubber |
| b. | | Nylon |
| c. | | Polyster |
| d. | | None of the above
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| 5. | What is an Enamel? |
| a. | | A hardened transparent coating of paint |
| b. | | A glossy coating fused to the surface of a metal, glass or pottery |
| c. | | A kind of clay mixed with pigments |
| d. | | None of the above
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| 6. | Which chemical is used in photography? |
| a. | | Sodium sulphate |
| b. | | Sodium sulfhite |
| c. | | Sodium oxilate |
| d. | | Sodium thiosulphate
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| 7. | Which of the following is used to harden and preserve zoological specimen? |
| a. | | Formic acid |
| b. | | Phenol |
| c. | | Ethyl alcohol |
| d. | | Formalin
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| 8. | Lead etraethyl is: |
| a. | | A paint constituent |
| b. | | An ink constituent |
| c. | | A petrol additive |
| d. | | An insecticide
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| 9. | Which one of the following element names is a Greek name which means idle or lazy because of its inert nature? |
| a. | | Krypton |
| b. | | Helium |
| c. | | Xenon |
| d. | | Argon
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| 10. | Compound of which two elements are used in the rechargeable cells? |
| a. | | Nickel and cadmium |
| b. | | Cadmium and mercury |
| c. | | Nickel and lead |
| d. | | Carbon and cadmium
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| 11. | The human body is made up of several chemical elements; the elements present in the highest proportion (65%) in the body is: |
| a. | | Carbon |
| b. | | Hydrogen |
| c. | | Oxygen |
| d. | | Nitrogen
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| 12. | Bones of the human body are mainly made up of which compounds? |
| a. | | Calcium and phosphorous |
| b. | | Calcium and nitrogen |
| c. | | Sodium and calcium |
| d. | | Calcium and iron
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| 13. | Which of the following statements about metal is false? |
| a. | | Metals conduct electricity |
| b. | | Some metals are soft |
| c. | | Metals cannot be converted into their vapors |
| d. | | Some metals occur as pure metals and other as their compounds in nature
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| 14. | Which are of the following about the coal is wrong? |
| a. | | Coal is formed by the compression of dead animals inside the soil |
| b. | | The formation of coal takes millions of years |
| c. | | Coal is a complex mixture of several substances |
| d. | | All varieties of coal have equal fuel value
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| 15. | Petroleum is: |
| a. | | A compound |
| b. | | A mixture |
| c. | | A colloid |
| d. | | A solution
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| 16. | Natural gas is nearly all methane while coal gas is: |
| a. | | Nearly all ethane |
| b. | | Almost half hydrogen |
| c. | | Half methane |
| d. | | 100% methane
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| 17. | What is the device 'electrostatic precipitator' used as? |
| a. | | Precipitating organic compounds in industries |
| b. | | Separating solid components from petroleum |
| c. | | To trap dust from chimney smoke in industries |
| d. | | To coagulate protein frommilk in diaries
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| 18. | Butter is: |
| a. | | An oil |
| b. | | An acid |
| c. | | A fat |
| d. | | None of the above
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| 19. | The organic reaction represented by the equation CH3- CH=O+H2NOH
Ch3-CH=NH+H2O is an example of |
| a. | | An addition reaction |
| b. | | A condensation reaction |
| c. | | An oxidation reaction |
| d. | | An elimination reaction
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| 20. | Acetone is good solvent and is volatile; these two properties make it suitable for the use in: |
| a. | | Drugs |
| b. | | Paints |
| c. | | Fibres |
| d. | | Ink
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| 21. | The formula C6h5-CO-CH3 represents: |
| a. | | Acetone |
| b. | | Acetic acid |
| c. | | Acetophenone |
| d. | | Phenyl acetate
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| 22. | Which of the following is a mixed ether? |
| a. | | CH3-O-CH3 |
| b. | | C6H5-O-C6H5 |
| c. | | C2H5-O-CH3 |
| d. | | C2H5-O-C2H5
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| 23. | Which of the following is synthetic fruit essence? |
| a. | | Butyl acetate |
| b. | | Methyl butyrate |
| c. | | Methyl acetate |
| d. | | Citric acid
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| 24. | Wood is preserved from attack by termites by a material marketed as creosote oil; this is a mixture of |
| a. | | Ethyl alcohol and phenol |
| b. | | Tar and water |
| c. | | Crosols |
| d. | | Kerosene and tar
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| 25. | When milk turns sour, one of the products formed in the milk is |
| a. | | Tartaric acid |
| b. | | Lactic acid |
| c. | | Citric acid |
| d. | | Gluconic acid
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| 26. | A compound containing an asymmetric carbon is |
| a. | | CH3CHCl2CH3 |
| b. | | CH3CH(OH)COOH |
| c. | | C6H5CHCl2 |
| d. | | CH3CBr2COOH
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| 27. | The Latin word fomica means ant. The name formatic acid is derived from this latin word because |
| a. | | This acid, in ancient times, was used to eliminate ant-hills |
| b. | | This corrosive acid is secreted by ants to drive away their enemies |
| c. | | This acid was first obtained by the distillation of ants |
| d. | | Ants are attracted by the odor of this acid
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| 28. | Which of the following is a polymer? |
| a. | | TNT |
| b. | | PVC |
| c. | | TEL |
| d. | | 2,4-D
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| 29. | The non-stick coating in a frying pan is essentially made of |
| a. | | Polytetrafluoroethylene |
| b. | | Polystyrene |
| c. | | Polythene |
| d. | | Polyvinyl chloride
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| 30. | The main buffer system of human blood is |
| a. | | H2CO3-HCO3- |
| b. | | H2CO3-CO32- |
| c. | | CH3COOH-CH3COO- |
| d. | | NH2CONH2-NH2CONH3+
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| 31. | Alkaloids, a class of nitrogen containing basic compounds are |
| a. | | Physiological active |
| b. | | Nerve poison |
| c. | | Essential for cell growth |
| d. | | Used as food additives
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| 32. | The double helical structure for the DNS molecule was established in 1953 by |
| a. | | Chargaff |
| b. | | Watson and Crick |
| c. | | Linus Pauling |
| d. | | Krebs
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| 33. | Insulin is |
| a. | | An enzyme |
| b. | | A vitamin |
| c. | | A protein |
| d. | | A synthetic drug
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| 34. | Zinc helps in the synthesis of biological protein; this is the basis for using zinc ointment for: |
| a. | | Growing more hair |
| b. | | Healing wounds |
| c. | | Increasing body weight |
| d. | | Growing long nails
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| 35. | The normal glucose content in milligrams per 100 ml of human blood is |
| a. | | 10-15 |
| b. | | 68-96 |
| c. | | 2-3 |
| d. | | 100
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| 36. | Carbohydrates are |
| a. | | Unstable |
| b. | | Energy rich |
| c. | | Indigestable |
| d. | | Muscle building
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| 37. | Starch on hydrolysis gives |
| a. | | CO2 and H2O |
| b. | | Fructose |
| c. | | Sucrose |
| d. | | Glucose
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| 38. | Which of the following about cellulose is wrong? |
| a. | | It is insoluble in water |
| b. | | It is a polymer of glucose |
| c. | | Celluloid is made from cellulose |
| d. | | Animals, but not man, can digest cellulose
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| 39. | Chemically called ascorbic acid, what is it commonly known? |
| a. | | Sulfa drug |
| b. | | Vitamin C |
| c. | | Vitamin A |
| d. | | Pencilin
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| 40. | A carbohydrate contains hydrogen and oxygen atoms in the ratio of |
| a. | | 1:2 |
| b. | | 2:1 |
| c. | | 1:1 |
| d. | | 2:3
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| 41. | The peptide linkage that bonds amino acids together in protein chains has the structure |
| a. | | –CO-NH2 |
| b. | | –COO-NH |
| c. | | –CO-NH- |
| d. | | –CO-NR-
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| 42. | Limestone is: |
| a. | | CaO |
| b. | | CaC2 |
| c. | | CaSO4 |
| d. | | CaCO3
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| 43. | The iron ore magnetite consists of |
| a. | | Fe2O3 |
| b. | | Fe3O4 |
| c. | | FeCO3 |
| d. | | 3Fe2O3.3H2O
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| 44. | Malachite, azurite and chalcopyrites are ores of |
| a. | | Nickel |
| b. | | Chromium |
| c. | | Calcium |
| d. | | Tin
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| 45. | At high temperature, aluminum has the ability to displace metals less electropositive than itself from the metal oxides. This ability is applied in |
| a. | | Welding industry |
| b. | | Heavy machinery fabrication |
| c. | | Metallurgy |
| d. | | Electronic industry
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| 46. | Which of the following is false? |
| a. | | Minerals are the compound states in which some elements occur in nature |
| b. | | All ores are minerals but not all minerals are ore |
| c. | | Mineral exists in nature for all metals |
| d. | | When a mineral can be commercially used for obtaining a metal, it is called an ore
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| 47. | The ability of a metal to be drawn into thin wires is called |
| a. | | Permeability |
| b. | | Temper |
| c. | | Malleability |
| d. | | Ductility
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| 48. | The radioactivity of an element is |
| a. | | Temperature dependent |
| b. | | Pressure dependent |
| c. | | Dependent on the chemical state of the element |
| d. | | Independent of the above three
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| 49. | A deuteron contains |
| a. | | Two protons |
| b. | | One proton, one neutron and one electron |
| c. | | One proton and one electron |
| d. | | One proton and two neutrons
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| 50. | Gamma rays have |
| a. | | Unit mass and zero charge |
| b. | | Unit mass and unit positive charge |
| c. | | Unit mass and no charge |
| d. | | No mass and no charge
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| 51. | The mass energy equivalence theory was first proposed by |
| a. | | N. Bohr |
| b. | | Einstein |
| c. | | C.M. Davisson |
| d. | | A. Sommerfield
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| 52. | A common method of detecting nuclear radiation involves the use of |
| a. | | A cyclotron |
| b. | | A mass spectrometer |
| c. | | A Geiger counter |
| d. | | An ammeter
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| 53. | Nuclear fusion is a |
| a. | | Chain reaction |
| b. | | Exoergic reaction |
| c. | | Endoergic reaction |
| d. | | Thermal reaction
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| 54. | Of the following radiations, the one most easily stopped by air is composed of |
| a. | | Alpha rays |
| b. | | Beta rays |
| c. | | Gamma rays |
| d. | | X-rays
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| 55. | When hydrogen nuclei trap neutrons, they become |
| a. | | Hydrogen atom |
| b. | | Deuterons |
| c. | | Tritium atoms |
| d. | | Beta rays
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