General Science | Chemistry | Miscellaneous

General Science | Chemistry | Miscellaneous

Jan 29, 2025 - 12:25 Updated: Jan 29, 2025 - 15:24
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1. Which gas is used in fire extinguisher?

Carbon dioxide
Hydrogen
Oxygen
Sulphur dioxide

2. In the ordinary fire extinguisher, carbon dioxide is generated by the reaction of

Limestone and dilute sulphuric acid
Marble powder and dilute hydrochloric acid
Sodium bicarbonate and dilute sulphuric acid
Magnesite and dilute hydrochloric acid

3. An active chemical to remove mosquitoes is

Allethrins
Atropin
2-ISO propoxiphinyal
Benzene Hexachlorophene

4. Which one of the following compounds is used to make fireproof clothing?

Sodium Sulphate
Magnesium Sulphate
Ferrous Sulphate
Aluminium Sulphate

5. Which of the following is used as a mosquito repellent?

Pyrethrum
Rotenone
Ephedrine
None of these

6. Which chemical substance is used for making rat poison?

Ethyl Alcohol
Methyl Isocyanate
Potassium Cyanide
Ethyl Isocyanide

7. Which one of the following is used as rat poison?

Zinc Sulphide
Lead Sulphide
Calcium Phosphate
Zinc Phosphide

8. Rodenticide is the chemical which is used to control.

Bats
Monkeys
Mouse
Rabbits

9. Aluminium Phosphide is used as

Insecticide
Fungicide
Rotenticide
Fumigant

10. Which of the following archaeological samples is adopted to determine the age of firewood bone and shell?

Uranium-238
Argon-Isotopes
Carbon-14
Strontium-90

11. Carbon dating is used to determine the age of

Trees
Earth
Fossils
Rocks

12. 'Radioactive dating' is a technique which can be used to measure

The age of rocks
Composition of rocks
Colour of rocks
Weight of rocks

13. Which of the following method is used for measuring the age of earth?

Carbon dating process
Biotechnology Law
Biological clock method
Uranium process

14. Which one of the following types of glass can cut off ultraviolet rays?

Soda glass
Pyrex glass
Jena glass
Crookes glass

15. With which of the following is BRIT (Government of India) engaged?

Rail Coach
Information Technology
Isotope Technology
Road Transport

16. Which one among the following is called philosopher's wool?

Zinc Bromide
Zinc Nitrate
Zinc Oxide
Zinc Chloride

17. A pungent smell often present near the urinals is due to

Sulphur dioxide
Chlorine
Ammonia
Urea

18. Which one of the following chemicals had been in use till now for making artificial clouds?

Potassium Nitrate
Heavy Water
Sulphur dioxide
Silver iodide

19. The substance used for artificial rain is

Silver bromide
Ammonium nitrate
Silver iodide
All of the above

20. Amount of rain depends on

Air pressure
Humidity in atmosphere
Water cycle
Temperature

21. Methane is present in the atmosphere of

Moon
Sun
Jupiter
Mars

22. Which one of the following is called the 'metal of future'?

Copper
Iron
Titanium
Aluminium

23. Chemically 'Vermillion' is

Calcium Carbonate
Potassium Nitrate
Mercuric Sulphide
Sodium Chloride

24. Which is used in Dry Washing?

Petrol
Benzene
Alcohol
All of these

25. Which one of the following colours is supplied by Sodium Chromate?

Blue
Red
Green
Black

26. When kept in air and darkness, which of the following elements glows spontaneously?

Red phosphorus
White phosphorus
Scarlet phosphorus
Violet phosphorus

27. Carbon Nanotubes (CNTs) prepared by

Fuller
Iijima
Faraday were
Raman

28. Where was the first desalination plant in India to produced one lakhs litres fresh water per day based on low temperature thermal desalination principle commissioned?

Kavaratti
Port Blair
Mangalore
Valsad

29. In India, water desalination plant is located in

Lakshadweep
Goa
Cuttack
Chennai

30. Which chemical acts as a reclamation agent for alkaline soil?

Calcium Carbonate
Calcium Sulphate
Calcium Oxide
None of the above

31. Which one of the following concerns soil?

Edaphic
Climatic
Biotic
Topography

32. Liquid oxygen or liquid hydrogen is used technology in obtaining the industrial level called

Pyrotechnics
Pyrometry
Hydroponics
Cryogenics

33. Smokescreen is used in warfare for the purpose of concealment and camouflage. Smoke screens generally consists of fine particles of

Sodium chloride dispersed in air
Silver iodide dispersed in air
Titanium oxide dispersed in air
Magnesium oxide dispersed in air

34. In a common dry cell, electrolyte is

Zinc
Sulphuric acid
Ammonium chloride
Manganese dioxide

35. The energy, found in dry cell is

Mechanic
Electric
Chemical
Electromagnetic

36. Which one of the following solutions of electrolytes is used in the car battery?

Sodium sulphate
Nitric acid
Sulphuric acid
Potassium nitrate

37. Bhopal Gas Tragedy was caused due to the leakage of

Methyl Isocyanate
Nitrogen dioxide
Sulphur dioxide
Carbon monoxide

38. Which of the following countries has made it mandatory to blend ethanol with gasoline?

China
U.K.
Switzerland
Brazil

39. Which of the following is an inorganic gaseous pollutant of air?

Phosgene
Hydrogen Cyanide
Hydrogen Sulphide
Methane

40. Cement is widely used in the construction of buildings. It contains.

Calcium silicate
Calcium aluminate
Calcium sulfoaluminate
All of the above

41. Mist is formed as a result of

Condensation
Circulation
Evaporation
Sublimation

42. Fuse wire of appropriate thickness improves its efficiency to prevent damage. These wires are made up of.

Pure zinc
Pure lead
Alloy of lead and tin
Alloy of lead and zinc

43. Soap and detergents help remove dirt from cloths. It does so because of having two parts

Hydrophilic, neutrophilic
Both the hydrophobic
Hydrophilic and hydrophobic
Neutrophilic, hydrophobic

44. Choose the best fire extinguisher.

Oxygen
Water
Carbon dioxide
Blanket

45. Bleaching powder used in Fish pond is working as.

Disinfectant
Sterelent
Snail Controller
Parasticide

46. Fuse wire used in electric instruments are made up of

Pure zinc
Pure lead
Alloy of lead and tin
Alloy of lead and zinc

47. Batteries used in mobile and smart phones are

Dry cell
Mercury cell
Lithium-ion battery
Lead storage battery

48. One carbon credit is accepted as equivalent to

100 kg of carbon
100 kg of carbon dioxide
1000 kg of carbon
1000 kg of carbon dioxide

49. The paste of a white material in water is used to maintain a fractured bone fixed in place. The white material used is called

bleaching powder
plaster of Paris
powder of zinc oxide
lime powder

50. The total amount of green-house gases produced, to directly and indirectly support human activities is referred to as

Carbon dioxide index
Carbon footprint
Carbon sequestration
Carbon capture

51. Calcium carbide is used for artificial ripening of green fruits because it produces

Acetylene
Methylene
Florigen
Auxin

52. Which one of the following elements is used as a timekeeper in atomic clocks?

Potassium
Caesium
Calcium
Magnesium

53. Density of water is

maximum at 0°C
minimum at 0°C
maximum at 4°C
minimum at - 4°C

54. The phosphorus used in the manufacture of safety matches is

Red phosphorus
Black phosphorus
White phosphorus
Scarlet phosphorus

55. Banking soda is

Sodium hydrogen carbonate
Sodium dihydrogen cabonate
Disodium hydrogen carbonate
Sodium carbonate

56. Which gas is known as 'noble gas'?

Hydrogen
Oxygen
Helium
Carbon dioxide

57. Vinegar is chemically known as

acetic acid
butyric acid
formic acid
tartaric acid

58. The liquid/liquids barometer is/are

water
mercury
alcohol
All of the above

59. Ozone hole is caused by

acetylene
ethylene
chlorofluorocarbons
methane

60. Which is main component of natural gas?

Methane
Ethane
Propane
Benzene

61. Example of corrosion is

Black coating on silver
Green coating on copper
Brown coating on iron
All of the Above

62. Which acid is present in Acid Rain?

Benzoic acid
Acetic acid
Nitric acid
Oxalic acid

63. Which one of the following is called dry ice?

Solid carbon dioxide
Liquid carbon dioxide
Liquid nitrogen
Liquid ammonia

64. Which one of the following greenhouse gases is in largest concentration in the atmosphere?

Chlorofluorocarbon
Nitrous oxide
Carbon dioxide
Methane

65. Pasteurisation is related to

sterilisation of milk
dehydration of milk
fermentation of milk
distillation of milk

66. Which one of the following is a tribasic acid?

Hydrochloric acid
Nitric acid
Sulphuric acid
Phosphoric acid

67. The 'laughing gas' is

hydrogen peroxide
nitrous oxide
carbon monoxide
sulphur dioxide

68. Which of the following is also used as a lubricant?

Cuprite
Graphite
Haematite
Cryolite

69. Which one of the following is the chemical name for baking soda?

Sodium bicarbonate (Sodium hydrogen carbonate)
Sodium carbonate
Potassium bicarbonate (Potassium hydrogen carbonate)
Potassium carbonate

70. Which one of the following is water gas?

Mixture of carbon monoxide and hydrogen
Mixture of carbon monoxide and nitrogen
Mixture of carbon dioxide and water vapour
Mixture of carbon monoxide and water vapour

71. Which one of the following is a heterogeneous mixture?

Hydrochloric acid
Vinegar
Milk
Soda water

72. Soap is sodium or potassium salt of

Stearic acid
Oleic acid
Palmitic acid
All of the above

73. 'Plum Pudding Model' for an atom was proposed by

Antoine Lavoisier
Robert Boyle
Emest Rutherford
J. J. Thomson

74. Which one of the following is the most characteristic property of an element?

Density
Boiling point
Mass number
Atomic number

75. Desalination of seawater is done by using reverse osmosis. The pressure applied to the solution is

larger than osmotic pressure
smaller than osmotic pressure
equal to osmotic pressure
equal to atmospheric pressure

76. Which metal is generally used for coating of brass utensils to prevent copper contamination?

Tin
Zinc
Aluminium
Lead

77. Which one of the following has different number of molecules? (All are kept at normal temperature and pressure.)

3 gram of Hydrogen
48 gram of Oxygen
42 gram of Nitrogen
2 gram of Carbon

78. The LPG cooking gas contains propane and butane as the constituents. A sulphur containing compound is added to the LPG, because

it lowers the cost of production
it enhances the efficiency of LPG
it facilitates easy detection of leakage of the gas
it assists in liquefying hydrocarbons

79. Which one of the following gases gives acidic solution on dissolving in water?

Hydrogen
Carbondioxide
Nitrogen
Oxygen

80. How many moles of hydrogen atom are present in one mole of Aluminium hydroxide?

One mole
Two moles
Three moles
Four moles

81. A homogeneous mixture contains two liquids. How are they separated?

By filtration
By evaporation
By distillation
By condensation

82. 'Plaster of Paris' is made up of

Marble
Cement
Gypsum
Limestone

83. 'Acid rain' consists of the following.

Acetic acid and Phosphoric acid
Acetic acid and Sulphuric acid
Nitric acid and Sulphuric acid
Hydrogen chloride and Acetic acid

84. Hydrogen bomb is based on

nuclear fission
nuclear fusion
natural radioactivity
artificial radioactivity reactions

85. Graphite, carbon and diamonds are

isotopes
isomers
isotones
allotropes

86. Potassium permaganate is used to purify water as it is

sterilising
oxidising
reducing
leaching

87. Radiocarbon dating technique is used to estimate the age of

rocks
monuments
soil
fossils

88. Natural radioactivity was discovered by

Marie Curie
Ernest Rutherford
Henri Becquerel
Enrico Fermi

89. The gas that filled the electric bulb is

nitrogen
hydrogen
carbon dioxide
oxygen

90. The following waste comes under red category.

metal
drug
oil waste
food waste

91. Joule-Thomson process is extremely useful and economical for attaining low temperature. The process can be categorised as

isobaric process
isoenthalpic process
adiabatic process
isochoric process

92. The disinfection of drinking water by municipalities is mostly by

Chlorination
Bromination
Boiling
UV radiation

93. The activated sludge treatment is carried out by

high temperature
acidification
microbes
moisture

94. The temporary hardness of water is caused by

Oxides
Bicarbonates
Chlorides
Sulphates

95. Which is used in alcoholic beverages?

Ethanol
Methanol
Phenol
Glycerol

96. The function of heavy water in a nuclear reactor is to

cool down the reactor
stop the nuclear reaction
slow down the speed of neutrons
increase the speed of neutrons

97. Which one of the following is purest form of Carbon?

Charcoal
Coke
Fullerene
Carbon black

98. Which one of the following metals is alloyed with sodium to transfer heat in a nuclear reactor?

Potassium
Calcium
Magnesium
Strontium

99. If the bandgap between valence band and conduction band in a material is 5.0 eV, then the material is

semiconductor
good conductor
super conductor
insulator

100. When pure water boils vigorously, the bubbles that rise to the surface are composed primarily of

air
hydrogen
hydrogen and oxygen
water vapour