1. Which one of the following when dissolved in HO gives hissing sound?
A. Limestone
B. slacked lime
C. soda lime
D. quick lime
2. Which one of the following is also called Stranger Gas?
A. Argon
B. Neon
C. Xenon
D. Nitrous oxide
3. What are Rubies and Sapphires chemically known as
A. Silicon dioxide
B. Aluminium oxide
C. Lead tetra oxide
D. Boron nitride
4. Which one of the following is used as a mordant in dying and tanning industry?
A. Magnesium oxide
B. Magnesium carbonate
C. Magnesium chloride
D. Magnesium sulphate
5. Mixture of which one of the following pairs of gases is the causes of occurance of most of the explosion in mines?
A. Hydrogen and oxygen
B. oxygen and acetylene
C. Methane and air
D. Carbon dioxide and methane
6. Nail polish remover contains
A. Acetone
B. Benzeme
C. Petroleum ether
D. Acetic acid
7. Which one of the following correctly defines the state of glass?
A. Crystalline solid
B. Super cooled liquid
C. Condensed gas
D. Liquid crystal
8. Which one of the following is an element which never exhibits positive oxidation state in any of its compounds?
A. Oxygen
B. Chlorine
C. Fluorine
D. Carbon
9. Which one of the following materials is suitable for water purification?
A. Silicones
B. Zeolites
C. Asbestos
D. Quartz
10. Which one of the following is a major constituent of Biogas ?
A. Carbon dioxide
B. methane
C. hydrogen
D. nitrogen dioxide
11. Which one of the following glasses is used in bullet proof screens?
A. Soda glass
B. Pyrex glasss
C. Jena glass
D. Reinforced glass
12. For Which one of the following is the density maximum ?
A. Chloroform
B. Water
C. Benzene
D. Ice
13. Which substance is used to retard the setting action of cement?
A. CaO
B. AlO
C. CaSO.2HO
D. NaO + KO
14. What is a mixture of potassium nitrate , powdered charcoal and sulphur called?
A. Glass
B. Cement
C. Paint
D. Gun Powder
15. Which one of the following is the softest?
A. Iron
B. Aluminium
C. Calcium
D. Lithium
16. Which one of the following is correct ?
Butter is
A. A super cooled oil
B. an emulsion
C. a molecular solid
D. none of these
17. Which one of the following is an element ?
A. Topaz
B. Diamond
C. Ruby
D. Sapphire
18. What are soaps?
A. Salts of silicates
B. Esters of heavy fatty acids
C. Sodium, salts of heavier fatty acids
D. Mixture of glycerol and alcohols
19. In vulcanisation, natural rubber is heated with
A. carbon
B. Silicon
C. Sulphur
D. Phosphorus
20. Which variety of glass is heat resistant?
A. Hard glass
B. Flint glass
C. Pyrex glass
D. Bottle glass
21. What is the main constituent of coal gas?
A. Oxygen
B. Water
C. Nitrogen
D. Methane
22. For Which one of the following is the density maximum ?
A. Chloroform
B. Water
C. Benzene
D. Ice
23. The chemicals used as a fixer in phosphorous is
A. borax
B. sodium thiosulpahte
C. sodium sulphate
D. ammonium persulphate
24. Which one of the following does not contain silver?
A. horn silver
B. german silver
C. ruby silver
D. Lunar caustic
25. Which one among the following is called philosophers wool?
A. zinc bromide
B. zinc nitrate
C. zinc oxide
D. zinc chloride
26. Which one of the following types of glass can cut off ultraviolet rays?
A. soda glass
B. pyrex glass
C. jena glass
D. crookes glass
27. The major ingrediation of leather is
A. Carbohydrate
B. Collagen
C. Polymer
D. nuclei acid
28. Which one of the following metals is found in plaster of paris?
A. Calcium
B. Magnesium
C. Pottasium
D. Sodium
29. The oxide of Nitrogen used in medicine as anaesthetic is
A. Nitrogen dioxide
B. Nitric oxide
C. Nitrous oxide
D. Nitrogen pentoxide
30. Which variety of coal contains the highest percentage of carbon?
A. Anthracite
B. Peat
C. Bituminous
D. Lignite
31. Which synthetic fibre is known as artificial silk?
A. Cotton
B. Rayon
C. Terylene
D. Nylon
32. Bagasse, a by-product of sugar manufacturing industry is used for the production of
A. Nylon
B. Glass
C. Paper
D. Alcohol
33. Glass is made of the mixture of
A. Quartz and mica
B. Sand and salt
C. Sand and silicates
D. None of these
34. Which one of the following is used as a filter in rubber tyres?
A. Graphite
B. Coal
C. Coke
D. Carbon black
35. Which one of the following polymeric matreials is used for making bullet proof jacket?
A. NYLON 6.6
B. RAYON
C. KEVLAR
D. DACRON
36. Which one of the following is present in the emission from "unleaded petrol"?
A. carbon monoxide
B. carbon dioxide
C. ethylene
D. hydrocarbons
37. Which one of the following is used in preparing match sticks?
A. Chile saltpeter
B. Indian salpetre
C. Red phosphorus
D. Sodium bicarbonate
38. Chloro-fluro-carbon gases are not used in which of the following?
A. aerosol sprays
B. fire-extinguishers
C. refrigerators
D. air-conditioning
39. Among the following elements, which one is not present in a pure sugar?
A. Carbon
B. hydrogen
C. Nitrogen
D. oxygen
40. Which one of the following has the highest fuel value?
A. hydrogen
B. charcoal
C. natural gas
D. gasoline
41. Which one of the following non metals is not a poor conductor of electricity
A. Sulphur
B. Selenium
C. Bromine
D. Phosphorus
42. Which one of the following is not a chemical change ?
A. Burning of coal in air
B. Fermentation of sugarcane juice
C. Cracking of petroleum
D. Crystallization of table salt from sea water
43. Which metal remains in the liquid form under normal conditions?
A. zinc
B. radium
C. uranium
D. mercury
44. The rusting of iron nail
A. decrease its weight
B. increase its weight
B. does not affect weight
D. doesnotaffect weight but iron is reduced
45. For which one of the following is the density maximum?
A. chloroform
B. benzene
C. water
D. ice
46. What are Rubies and Sapphires chemically known as
A. silicon dioxide
B. aluminium oxide
C. lead tetra oxide
D. boron nitride
47. Acid rain contains high levels of
A. oxalic acid
B. acetic acid
C. sulphuric and nitric acids
D. carbolic acid
48. Talc contains which one of the following ?
A. zinc,calcium,oxygen
B. calcium,oxygen,tin
C. magnesium,silicon,oxygen
D. zinc,tin,sulphur
49. Which one of the following substances is made up of only one type of atoms?
A. water
B. hydrogen
C. milk
D. air
50. Which one of the following is used as a mordant in dyeing and tanning indusrty?
A. Magnesium oxide
B. magnesium carbonate
C. magnesium chloride
D. magnesium sulphate
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CHEMISTRY