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MCQs

Total Questions : 3103 | Page 29 of 311 pages
Question 281. Hydrazine is largely used
  1.    As a starting material for 'hypo'
  2.    In photographic industry
  3.    As rocket fuel
  4.    In printing industry
 Discuss Question
Answer: Option C. -> As rocket fuel
Question 282. Hydrogenation of oil does not
  1.    Remove double bonds
  2.    Raise its melting point
  3.    Improve its resistance to oxidation
  4.    None of these
 Discuss Question
Answer: Option D. -> None of these
Question 283. Hydrolysis of sugar is called
  1.    Hydration
  2.    Inversion
  3.    Esterification
  4.    None of these
 Discuss Question
Answer: Option B. -> Inversion
Question 284. Ethyl alcohol cannot be produced
  1.    From waste sulphite substrate of paper mills
  2.    By esterification and hydroloysis of ethylene
  3.    From molasses
  4.    None of these
 Discuss Question
Answer: Option D. -> None of these
Question 285. Pencillin, an antibiotic drug was discovered by
  1.    Alexender
  2.    Flaming
  3.    Dr. Zivago
  4.    None of these
 Discuss Question
Answer: Option A. -> Alexender
Question 286. Chemical formula of 'salt cake' is
  1.    Na₂SO₄
  2.    CaSO₄
  3.    MgSO₄
  4.    BaSO₄
 Discuss Question
Answer: Option A. -> Na₂SO₄
Question 287. Detergent is produced by the sulphonation of dodecyl benzene, which is an __________ reaction.
  1.    Endothermic
  2.    Exothermic
  3.    Irreversible
  4.    Both B and C
 Discuss Question
Answer: Option D. -> Both B and C
Question 288. Plasticisers are added to paints to
  1.    Make it corrosion resistant
  2.    Make glossy surface
  3.    Give elasticity & prevent cracking of the film
  4.    Increase atmospheric oxidation
 Discuss Question
Answer: Option C. -> Give elasticity & prevent cracking of the film
Question 289. Which catalyst is used in the manufacture of ethylene oxide by oxidation of ethylene?
  1.    AgO
  2.    Al2O₃
  3.    ZnCl₂
  4.    FE₂O₃
 Discuss Question
Answer: Option A. -> AgO
Question 290. Pick out the correct statement.
  1.    A fat is converted into oil by its hydrogenation
  2.    There is no difference between a fat and an oil so far as its physical properties are concerned
  3.    All vegetable oils except coconut oil, contains fatty acids having more than sixteen carbon atoms
  4.    Vegetable oils are classified as drying, non-drying and semi drying oils depending upon their fatty acids content
 Discuss Question
Answer: Option C. -> All vegetable oils except coconut oil, contains fatty acids having more than sixteen carbon atoms

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