AIC SS 1 Chemistry 3rd Term - 3rd C. A - 2023/24
  • 1. The existence of an electron in two or more forms in the same physical state is known as.........
A) Isomerism
B) Allotropy
C) Hybridisation
D) Isotopy
  • 2. Diamond does not conduct electricity because it .........
A) Is solid at room temperature
B) Has no free valence electrons
C) Is a giant molecule
D) Contains no bonded electrons
  • 3. Animal charcoal differs from wood charcoal in that it ................
A) Has a dark colour
B) Is rich in phosphate content
C) Has a good carbon content
D) Is a good absorbent
  • 4. The liquid product of the destructive distillation of coal is ............
A) Ethanol
B) Coal gas
C) Ammoniacal liquor
D) Aqueous ammonia
  • 5. A salt that absorbs moisture from the atmosphere without forming solution is said to be.......
A) Deliquescent
B) Hygroscopic
C) Efflorescent
D) Insoluble
  • 6. The loss of molecules of water of crystallisation to the atmosphere by some crystalline salts in known as ..........
A) Fluorescence
B) Efflorescence
C) Effervescence
D) Deliquescence
  • 7. The alkaline nature of an aqueous solution of sodium trioxocarbonate (iv) is due to the process of...........
A) Decomposition
B) Hydration
C) Dehydration
D) Hydrolysis
  • 8. The use of diamond in abrasives is due to its........
A) Hardness
B) High melting point
C) Durability
D) Metallic lustre
  • 9. Producer gas is a mixture of ......
A) CO2 and H2
B) CO2 and N2
C) CO and N2
D) CO and H2
  • 10. Which of the following is not a source of hydrocarbons?
A) Fossil fuels
B) Biomass
C) Nuclear energy
D) Natural gas
  • 11. Hydrocarbons are organic compounds composed of which two elements?
A) Carbon and oxygen
B) Carbon and sulfur
C) Carbon and hydrogen
D) Carbon and nitrogen
  • 12. Which of the following is not a class of hydrocarbons?
A) Alkynes
B) Alcohols
C) Alkanes
D) Alkenes
  • 13. Crude oil is a mixture of hydrocarbons primarily derived from:
A) Volcanic eruptions
B) Synthetic chemical reactions
C) Geological processes over millions of years
D) Plants and animals
  • 14. The important basic raw materials for the chemical industry are the following except........
A) Air
B) Limestone
C) Water
D) Petroleum
  • 15. Concentrated tetraoxosulphate (vi) acid is described as a heavy chemical because it............
A) Is used extensively in industries
B) Is a dense, oily liquid
C) Is a powerful dehydrating agent.
D) Has high molar mass
  • 16. Chemicals that are produced in small quantities and with high degree of purity are.....
A) Bulk chemicals
B) Light chemicals
C) Heavy chemicals
D) Fine chemicals
  • 17. Fine chemicals have the following characteristics except......
A) They are produced in small quantities because of limited applicability.
B) They are produced by process
C) They are produced in large quantities because of their high applicability
D) They are chemically pure
  • 18. What is the purpose of using indicators in chemistry?
A) To calculate the molar mass of a compound
B) To identify the presence of specific substances
C) determine the boiling point of a substance
D) To measure the concentration of a solution
  • 19. Why are hydrocarbons important for modern society?
A) They are used as raw materials in various industries
B) They help in reducing greenhouse gas emissions
C) They are a source of clean energy
D) They are essential for the production of medicines
  • 20. Which fraction of natural gas is commonly used for heating and cooking purposes?
A) Butane
B) Ethane
C) Methane
D) Propane
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