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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) Sulphur
B) Oxygen
C) Carbon
D) Nitrogen
  • 2. The molecular formula of pentene is
A) C5H10
B) C4H10
C) C5H12
D) C6H12
  • 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) Homologous series
C) Hydrocarbons
D) Petroleum
  • 5. The functional group of alcohols is
A) Amino group
B) Ester
C) Carbonyl group
D) Hydroxyl group
  • 6. The gas responsible for acid rain is
A) Sulphur dioxide
B) Nitrogen oxide
C) Hydrogen peroxide
D) Carbon dioxide
  • 7. Which oxide of carbon is poisonous
A) Nitrogen oxide
B) Carbon Dioxide
C) Carbon hydroxide
D) Carbon monoxide
  • 8. Limestone is mainly composed of
A) Calcium chloride
B) Calcium oxide
C) Calcium hydroxide
D) Calcium carbonate
  • 9. Which of the following is a hydrocarbon
A) Glucose
B) Ethanoic acid
C) Ethanol
D) Methane
  • 10. Ammonia is manufactured industrially by the
A) Solvay process
B) Frasch process
C) Contact process
D) Haber process
  • 11. The IUPAC name of CH4 is
A) Propane
B) Ethane
C) Butane
D) Methane
  • 12. Hydrocarbons are compounds containing only
A) Hydrogen and oxygen
B) Carbon and oxygen
C) Carbon and hydrogen
D) Carbon and nitrogen
  • 13. Ethene belongs to the homologous series of
A) Alkenes
B) Alcohols
C) Alkanes
D) Alkynes
  • 14. The functional group of carboxylic acids is
A) -NH2
B) -OH
C) -COOH
D) -CHO
  • 15. Alkanes are
A) Alcohols
B) Unsaturated hydrocarbons
C) Saturated hydrocarbons
D) Aromatic compounds
  • 16. _______ contain more than three -OH groups
A) Trihydric alcohols
B) Polyhydric alcohols
C) Monohydric alcohols
D) Dihydric alcohols
  • 17. Members of the same homologous series have the same
A) Odour
B) Number of carbon atoms
C) Functional group
D) Colour
  • 18. Esters are formed from the reaction between
A) Acid and alkali
B) Alkane and oxygen
C) Alcohol and carboxylic acid
D) Alkene and water
  • 19. Propanone is an example of a
A) Alcohol
B) Aldehyde
C) Ester
D) Ketone
  • 20. The functional group of aldehydes is
A) -CHO
B) -OH
C) -CO
D) -COOH
  • 21. Ethanol belongs to the class of compounds known as
A) Esters
B) Alcohols
C) Phenols
D) Ethers
  • 22. Which reagent is used to identify aldehydes
A) Lime water
B) Tollen's reagent
C) Dilute HCl
D) Bromine water
  • 23. ______ is one of the environmental effects of hydrocarbons
A) Combustion
B) Oxidation
C) Irritation
D) Smog formation
  • 24. The following are physical properties of alcohols except
A) Odour
B) Solubility
C) Boiling point
D) Steam
  • 25. ______ are organic compounds in which two alkyl or aryl groups are bonded to the same oxygen atom.
A) Ethers
B) Ketones
C) Esters
D) Aldehydes
  • 26. Ethanal is an example of
A) Ketones
B) Ethers
C) Phenols
D) Aldehydes
  • 27. ______ are aromatic compounds in which a hydroxyl group (-OH) is directly bonded to a benzene ring.
A) Ketones
B) Aldehydes
C) Esters
D) Phenols
  • 28. ______ is a specific atom or group of atoms that gives a compound its characteristic properties
A) Functional group
B) Hydroxyl group
C) Alkyl group
D) Aryl group
  • 29. One of the following is a physical property of phenols
A) Volatile
B) Odour
C) Weakly acid
D) Pleasant smell
  • 30. Which functional group is represented by -CHO
A) Ketone
B) Ester
C) Ether
D) Aldehyde
  • 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) Alkanes
B) Alcohols
C) Alkenes
D) Alkynes
  • 33. The ability of carbon atoms to form long chains and rings.
A) Sublimation
B) Combustion
C) Catenation
D) Polymerization
  • 34. In a homologous series, each successive members differ by
A) -CH4
B) -CH3
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) Petroleum refining
B) Production of dyes
C) Manufacture of fertilizers
D) Bleaching agent in paper industries
  • 37. Ability of carbon atoms to form long chains and rings with itself is
A) Carbonate
B) Catenation
C) Isomerism
D) Tetravalency
  • 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) Petroleum
B) Hydrocarbons
C) Organic chemistry
D) Industrial chemicals
  • 40. One of the following is a characteristic of organic compounds
A) Smell
B) Colour
C) Solubility
D) Odour
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