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MCQs

Total Questions : 350 | Page 35 of 35 pages
Question 341. Schiff's reagent is used to detect the presence of
  1.    Aldehydes
  2.    Carboxylic acids
  3.    Phenols
  4.    esters
 Discuss Question
Answer: Option C. -> Phenols
Answer: (c).Phenols
Question 342. The gas produced when conc. H₂SO₄ reacts with KCl is
  1.    Cl₂
  2.    HCl
  3.    SO₃
  4.    SO₄
 Discuss Question
Answer: Option B. -> HCl
Answer: (b).HCl
Question 343. When starch is added to iodine solution, the color becomes
  1.    Yellow
  2.    White
  3.    Blue
  4.    Crimson red
 Discuss Question
Answer: Option C. -> Blue
Answer: (c).Blue
Question 344. In separating various ink by chromatography, the locating agent used is
  1.    H₂S gas
  2.    Na₂S
  3.    Na₂SO₃
  4.    None of above
 Discuss Question
Answer: Option D. -> None of above
Answer: (d).None of above
Question 345. K₂Cr₂O₇ is a crystalline solid which has color
  1.    Green
  2.    Orange red
  3.    Yellow
  4.    Black
 Discuss Question
Answer: Option B. -> Orange red
Answer: (b).Orange red
Question 346. Ethanol is made undrinkable by addition of
  1.    sugar cane
  2.    yeast
  3.    methanol
  4.    methane
 Discuss Question
Answer: Option C. -> methanol
Answer: (c).methanol
Question 347. On heating esters with an acid or base it will be
  1.    deployed
  2.    hydrolyzed
  3.    prototyped
  4.    homolysed
 Discuss Question
Answer: Option B. -> hydrolyzed
Answer: (b).hydrolyzed
Question 348. Ester's smell is
  1.    sweet only
  2.    fruity only
  3.    pungent
  4.    sweet and fruity
 Discuss Question
Answer: Option D. -> sweet and fruity
Answer: (d).sweet and fruity
Question 349. Methylated spirits which contain an estimated percentage 90% is
  1.    methyl
  2.    methanol
  3.    ethanol
  4.    propanol
 Discuss Question
Answer: Option C. -> ethanol
Answer: (c).ethanol
Question 350. The reaction which involves the breakage of O-H bond in alcohols is
  1.    hydrolysis
  2.    esterification
  3.    esterlytic
  4.    hydration
 Discuss Question
Answer: Option B. -> esterification
Answer: (b).esterification

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