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