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GENERAL SCIENCE - SYNTHETIC MATERIALS MCQs

Total Questions : 23 | Page 2 of 3 pages
Question 11. . Optic fibres are mainly used for which of the following?
  1.    Musical instruments
  2.    Food industry
  3.    Weaving
  4.    Communication
 Discuss Question
Answer: Option D. -> Communication
Question 12. . What are the soaps?
  1.    Salts of silicates
  2.    Mixture of glycerol and alcohols
  3.    Sodium or potassium salts of heavier fatty acids
  4.    Esters of heavy fatty acids
 Discuss Question
Answer: Option C. -> Sodium or potassium salts of heavier fatty acids
Question 13. . In vulcanisation, natural rubber is heated with
  1.    Carbon
  2.    Silicon
  3.    Sulphur
  4.    Phosphorous
 Discuss Question
Answer: Option C. -> Sulphur
Question 14. . How does common salt help in separating soap from the solution after saponification?
  1.    By decreasing density of Soap
  2.    By decreasing solubility of Soap
  3.    By increasing density of Soap
  4.    By increasing solubility of Soap
 Discuss Question
Answer: Option B. -> By decreasing solubility of Soap
Question 15. . Deep blue colour is imparted to glass by the presence of
  1.    cupric oxide
  2.    nickel oxide
  3.    cobalt oxide
  4.    iron oxide
 Discuss Question
Answer: Option C. -> cobalt oxide
Question 16. . The vast resources of unutilised natural gas can be used in the production of
  1.    graphite
  2.    Synthetic petroleum
  3.    fertilisers
  4.    carbide
 Discuss Question
Answer: Option C. -> fertilisers
Question 17. . Glass is made of the mixture of
  1.    quartz and mica
  2.    sand and silicates
  3.    salt and quartz
  4.    sand and salt
 Discuss Question
Answer: Option B. -> sand and silicates
Question 18. . The type of glass used in making lenses and prisms is
  1.    jena glass
  2.    soft glass
  3.    pyrex glass
  4.    flint glass
 Discuss Question
Answer: Option D. -> flint glass
Question 19. . Gypsum is added to cement clinker to
  1.    increase the tensile strength of cement
  2.    decrease the rate of setting of cement
  3.    facilitate the formation of colloidal gel
  4.    bind the particles of calcium silicate
 Discuss Question
Answer: Option B. -> decrease the rate of setting of cement
Question 20. . Soap is a mixture of sodium or potassium salts of
  1.    dicarboxylic acids
  2.    monocarboxylic acids
  3.    glycerol
  4.    tricarboxylic acids
 Discuss Question
Answer: Option B. -> monocarboxylic acids

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