PES SS 2 Chemistry (Obj) 3rd Term Exam
  • 1. _____ is a yellow, brittle, non-metallic element with atomic number (16) and atomic mass (32.06g/mol).
A) Carbon
B) Oxygen
C) Sulphur
D) Nitrogen
  • 2. The molecular formula of pentene is
A) C5H10
B) C4H10
C) C6H12
D) C5H12
  • 3. ______&______ are allotropes of sulphur.
A) Rhombic & Monoclinic
B) Oxygen & Nitrogen
C) Alkane & Alkene
D) Metal & Steel
  • 4. _______ is a family of organic compounds having the same general molecular formula, common functional group, similar chemical properties and each successive member differs by a -CH2 unit.
A) Organic chemistry
B) Petroleum
C) Homologous series
D) Hydrocarbons
  • 5. The functional group of alcohols is
A) Ester
B) Amino group
C) Hydroxyl group
D) Carbonyl group
  • 6. The gas responsible for acid rain is
A) Carbon dioxide
B) Nitrogen oxide
C) Sulphur dioxide
D) Hydrogen peroxide
  • 7. Which oxide of carbon is poisonous
A) Carbon Dioxide
B) Carbon monoxide
C) Carbon hydroxide
D) Nitrogen oxide
  • 8. Limestone is mainly composed of
A) Calcium hydroxide
B) Calcium oxide
C) Calcium carbonate
D) Calcium chloride
  • 9. Which of the following is a hydrocarbon
A) Methane
B) Ethanol
C) Glucose
D) Ethanoic acid
  • 10. Ammonia is manufactured industrially by the
A) Contact process
B) Solvay process
C) Frasch process
D) Haber process
  • 11. The IUPAC name of CH4 is
A) Butane
B) Methane
C) Ethane
D) Propane
  • 12. Hydrocarbons are compounds containing only
A) Carbon and oxygen
B) Hydrogen and oxygen
C) Carbon and nitrogen
D) Carbon and hydrogen
  • 13. Ethene belongs to the homologous series of
A) Alkenes
B) Alkanes
C) Alkynes
D) Alcohols
  • 14. The functional group of carboxylic acids is
A) -NH2
B) -CHO
C) -OH
D) -COOH
  • 15. Alkanes are
A) Unsaturated hydrocarbons
B) Alcohols
C) Aromatic compounds
D) Saturated hydrocarbons
  • 16. _______ contain more than three -OH groups
A) Dihydric alcohols
B) Monohydric alcohols
C) Polyhydric alcohols
D) Trihydric alcohols
  • 17. Members of the same homologous series have the same
A) Functional group
B) Colour
C) Number of carbon atoms
D) Odour
  • 18. Esters are formed from the reaction between
A) Acid and alkali
B) Alkane and oxygen
C) Alkene and water
D) Alcohol and carboxylic acid
  • 19. Propanone is an example of a
A) Ester
B) Alcohol
C) Ketone
D) Aldehyde
  • 20. The functional group of aldehydes is
A) -COOH
B) -CO
C) -CHO
D) -OH
  • 21. Ethanol belongs to the class of compounds known as
A) Esters
B) Ethers
C) Phenols
D) Alcohols
  • 22. Which reagent is used to identify aldehydes
A) Dilute HCl
B) Bromine water
C) Lime water
D) Tollen's reagent
  • 23. ______ is one of the environmental effects of hydrocarbons
A) Combustion
B) Irritation
C) Oxidation
D) Smog formation
  • 24. The following are physical properties of alcohols except
A) Odour
B) Boiling point
C) Solubility
D) Steam
  • 25. ______ are organic compounds in which two alkyl or aryl groups are bonded to the same oxygen atom.
A) Aldehydes
B) Esters
C) Ethers
D) Ketones
  • 26. Ethanal is an example of
A) Ethers
B) Ketones
C) Aldehydes
D) Phenols
  • 27. ______ are aromatic compounds in which a hydroxyl group (-OH) is directly bonded to a benzene ring.
A) Esters
B) Phenols
C) Ketones
D) Aldehydes
  • 28. ______ is a specific atom or group of atoms that gives a compound its characteristic properties
A) Hydroxyl group
B) Alkyl group
C) Functional group
D) Aryl group
  • 29. One of the following is a physical property of phenols
A) Volatile
B) Weakly acid
C) Odour
D) Pleasant smell
  • 30. Which functional group is represented by -CHO
A) Aldehyde
B) Ester
C) Ketone
D) Ether
  • 31. The IUPAC suffix for ketones is
A) -ol
B) -al
C) -one
D) -oate
  • 32. Hydrocarbons containing only single carbon-carbon bonds are called
A) Alkenes
B) Alkanes
C) Alcohols
D) Alkynes
  • 33. The ability of carbon atoms to form long chains and rings.
A) Sublimation
B) Polymerization
C) Catenation
D) Combustion
  • 34. In a homologous series, each successive members differ by
A) -CH3
B) -CH4
C) -CH2
D) -OH
  • 35. Which of the following is not a natural source of hydrocarbons?
A) Distilled water
B) Natural gas
C) Crude oil
D) Coal
  • 36. The following are uses of sulphuric acid except
A) Manufacture of fertilizers
B) Bleaching agent in paper industries
C) Production of dyes
D) Petroleum refining
  • 37. Ability of carbon atoms to form long chains and rings with itself is
A) Catenation
B) Tetravalency
C) Isomerism
D) Carbonate
  • 38. The following are classification of hydrocarbons except
A) Alkenes
B) Alcohols
C) Alkanes
D) Alkynes
  • 39. ________ serve as raw materials for fertilizers, dyes, plastics, and cleansing agents.
A) Hydrocarbons
B) Petroleum
C) Organic chemistry
D) Industrial chemicals
  • 40. One of the following is a characteristic of organic compounds
A) Colour
B) Solubility
C) Odour
D) Smell
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