Alcohols, Phenols and Ethers  MCQs

MCQs of Alcohols, Phenols and Ethers

Showing 71 to 80 out of 120 Questions
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71.
Choose the correct order of boiling point for ethanol, ethylene glycol and glycerol.
(a) Glycerol > ethanol > ethylene glycol
(b) Ethanol > ethylene glycol > glycerol
(c) Glycerol > ethylene glycol > ethanol
(d) Ethanol > glycerol > ethylene glycol
Answer:

Option (c)

72.
By which enzyme, is the fermentation of sugar present in molasses carried out, so that sugar is converted into glucose and fructose ?
(a) Zymase
(b) Invertase
(c) Maltase
(d) Diastase
Answer:

Option (b)

73.
Choose correct statement.
(a) Hydroboration reactions follows the Markonikov's rule.
(b) Using Grignard reagent methanal gives 2º alcohol, while other aldehydes gives 1º alcohol.
(c) Sucrose is hydrolysed to glucose and fructose by enzyme zymase.
(d) Azeotropic mixture of alcohol contains 95% ethanol and 5% water.
Answer:

Option (d)

74.
Reduction of ketone gives _____ .
(a) 2º alcohol
(b) 1º alcohol
(c) 3º alcohol
(d) Any of the above
Answer:

Option (a)

75.
Which enzyme found in yeast is used to ferment glucose and fructose to form ethanol ?
(a) Zymase
(b) Invertase
(c) Both (A) and (B)
(d) None of the above
Answer:

Option (a)

76.
By which test, 1º, 2º and 3º alcohols be detected ?
(a) Riemer-Tiemann reaction
(b) Fries migration reaction
(c) Fehling test
(d) Lucas test
Answer:

Option (d)

77.
When a piece of sodium metal is added to ethanol, _____ .
(a) ethanol is oxidised to ethanol
(b) hydrogen gas is evolved
(c) sodium hydroxide is formed
(d) ethanol is reduced to ethane
Answer:

Option (b)

78.
Which of the following reagents is not useful in preparation of ethyl chloride from ethanol ?
(a) Anhydrous ZnCl2 + HCl
(b) PCl3
(c) Red P + Cl2
(d) NaCl
Answer:

Option (d)

79.
How many litres of H2 gas will be produced at STP when ethanol is reacted with 23 g of Na metal in anhydrous condition ?

(Atomic weight of Na = 23g/mole)

(a) 11.2 litre
(b) 22.4 litre
(c) 36.6 litre
(d) 44.8 litre
Answer:

Option (a)

80.
_____ will react faster with Lucas reagent.
(a) (CH3)3C . OH
(b) (CH3)2CHOH
(c) CH3(CH2)2OH
(d) CH3CH2OH
Answer:

Option (a)

Showing 71 to 80 out of 120 Questions
5 6 7 8 9 10