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