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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) Carbon
B) Sulphur
C) Oxygen
D) Nitrogen
  • 2. The molecular formula of pentene is
A) C5H12
B) C5H10
C) C6H12
D) C4H10
  • 3. ______&______ are allotropes of sulphur.
A) Rhombic & Monoclinic
B) Oxygen & Nitrogen
C) Metal & Steel
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) Hydrocarbons
B) Homologous series
C) Petroleum
D) Organic chemistry
  • 5. The functional group of alcohols is
A) Amino group
B) Hydroxyl group
C) Ester
D) Carbonyl group
  • 6. The gas responsible for acid rain is
A) Sulphur dioxide
B) Hydrogen peroxide
C) Carbon dioxide
D) Nitrogen oxide
  • 7. Which oxide of carbon is poisonous
A) Carbon hydroxide
B) Carbon Dioxide
C) Nitrogen oxide
D) Carbon monoxide
  • 8. Limestone is mainly composed of
A) Calcium chloride
B) Calcium carbonate
C) Calcium hydroxide
D) Calcium oxide
  • 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) Contact process
C) Frasch process
D) Solvay process
  • 11. The IUPAC name of CH4 is
A) Ethane
B) Methane
C) Butane
D) Propane
  • 12. Hydrocarbons are compounds containing only
A) Carbon and oxygen
B) Hydrogen and oxygen
C) Carbon and hydrogen
D) Carbon and nitrogen
  • 13. Ethene belongs to the homologous series of
A) Alkenes
B) Alkanes
C) Alcohols
D) Alkynes
  • 14. The functional group of carboxylic acids is
A) -NH2
B) -OH
C) -COOH
D) -CHO
  • 15. Alkanes are
A) Unsaturated hydrocarbons
B) Aromatic compounds
C) Saturated hydrocarbons
D) Alcohols
  • 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) Functional group
B) Odour
C) Number of carbon atoms
D) Colour
  • 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) Ketone
B) Aldehyde
C) Ester
D) Alcohol
  • 20. The functional group of aldehydes is
A) -COOH
B) -OH
C) -CO
D) -CHO
  • 21. Ethanol belongs to the class of compounds known as
A) Alcohols
B) Ethers
C) Esters
D) Phenols
  • 22. Which reagent is used to identify aldehydes
A) Tollen's reagent
B) Bromine water
C) Dilute HCl
D) Lime water
  • 23. ______ is one of the environmental effects of hydrocarbons
A) Irritation
B) Oxidation
C) Combustion
D) Smog formation
  • 24. The following are physical properties of alcohols except
A) Boiling point
B) Odour
C) Solubility
D) Steam
  • 25. ______ are organic compounds in which two alkyl or aryl groups are bonded to the same oxygen atom.
A) Esters
B) Ethers
C) Aldehydes
D) Ketones
  • 26. Ethanal is an example of
A) Aldehydes
B) Ketones
C) Ethers
D) Phenols
  • 27. ______ are aromatic compounds in which a hydroxyl group (-OH) is directly bonded to a benzene ring.
A) Esters
B) Ketones
C) Phenols
D) Aldehydes
  • 28. ______ is a specific atom or group of atoms that gives a compound its characteristic properties
A) Hydroxyl group
B) Functional group
C) Alkyl group
D) Aryl group
  • 29. One of the following is a physical property of phenols
A) Weakly acid
B) Volatile
C) Odour
D) Pleasant smell
  • 30. Which functional group is represented by -CHO
A) Ketone
B) Ester
C) Aldehyde
D) Ether
  • 31. The IUPAC suffix for ketones is
A) -one
B) -ol
C) -al
D) -oate
  • 32. Hydrocarbons containing only single carbon-carbon bonds are called
A) Alcohols
B) Alkynes
C) Alkenes
D) Alkanes
  • 33. The ability of carbon atoms to form long chains and rings.
A) Combustion
B) Catenation
C) Sublimation
D) Polymerization
  • 34. In a homologous series, each successive members differ by
A) -CH2
B) -CH4
C) -CH3
D) -OH
  • 35. Which of the following is not a natural source of hydrocarbons?
A) Distilled water
B) Crude oil
C) Natural gas
D) Coal
  • 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) Carbonate
B) Isomerism
C) Catenation
D) Tetravalency
  • 38. The following are classification of hydrocarbons except
A) Alcohols
B) Alkynes
C) Alkenes
D) Alkanes
  • 39. ________ serve as raw materials for fertilizers, dyes, plastics, and cleansing agents.
A) Organic chemistry
B) Petroleum
C) Industrial chemicals
D) Hydrocarbons
  • 40. One of the following is a characteristic of organic compounds
A) Solubility
B) Smell
C) Odour
D) Colour
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