Question 1

Ethanol is prepared industrially by&#8230;&#8230;&#8230;&#10;A)Hydration of ethylene&#10;B)Fermentation of sugars&#10;C)Both the above&#10;D)None of these

Accepted Answer

Ethanol is prepared industrially by both the hydration of ethylene and the fermentation of sugars. The hydration of ethylene involves a chemical process where ethylene reacts with water in the presence of an acid catalyst to produce ethanol. Fermentation, on the other hand, is a biological process where sugars are converted into ethanol and carbon dioxide by the action of yeast or bacteria.

Question 2

Ethyl alcohol is industrially prepared from ethylene by…….. A)Permanganate oxidation B)Catalytic reduction C)Absorbing in H₂SO₄ followed by hydrolysis D)Fermentation

Accepted Answer

Ethyl alcohol (ethanol) is industrially prepared from ethylene by first absorbing it in concentrated sulfuric acid (H2SO4) to form ethyl hydrogen sulfate, which is then hydrolyzed to yield ethanol. This process is known as the hydration of ethylene.

Question 3

Coconut oil upon alkaline hydrolysis gives&#8230;&#8230;.&#10;A)Glycol&#10;B)Alcohol&#10;C)Glycerol&#10;D)Ethylene oxide

Accepted Answer

Coconut oil, like other fats and oils, undergoes alkaline hydrolysis (saponification) to produce glycerol and fatty acid salts (soap).

Question 4

Which enzyme converts glucose and fructose both into ethanol&#8230;&#8230;..&#10;A)Diastase&#10;B)Invertase&#10;C)Zymase&#10;D)Maltase

Accepted Answer

Zymase is the enzyme complex that converts glucose and fructose into ethanol and carbon dioxide during fermentation, primarily found in yeast.

Question 5

Primary alcohols can be obtained from the reaction of the RMgX…… A)CO₂ B)HCHO C)CH₃ CHO D)H₂O

Accepted Answer

Primary alcohols are obtained by reacting Grignard reagents (RMgX) with formaldehyde (HCHO). The reaction adds an alkyl group from the Grignard reagent to the carbonyl carbon of formaldehyde, resulting in the formation of a primary alcohol after hydrolysis.

Question 6

Formaldehyde gives an additive product with methyl magnesium iodide which on aqueous hydrolysis gives &#8230;..&#10;A)Isopropyl alcohol&#10;B)Ethyl alcohol&#10;C)Methyl alcohol&#10;D)Propyl alcohol

Accepted Answer

Formaldehyde reacts with methyl magnesium iodide (a Grignard reagent) to form an intermediate that, upon hydrolysis, yields primary alcohol. In this case, the primary alcohol formed is ethyl alcohol (ethanol).

Question 7

Benzyl alcohol is obtained from benzaldehyde by&#8230;..&#10;A)Fittig's reaction&#10;B)Cannizaro's reaction&#10;C)Kolbe's reaction&#10;D)Wurtz's reaction

Accepted Answer

Cannizzaro's reaction involves the disproportionation of non-enolizable aldehydes in the presence of a strong base, leading to the formation of an alcohol and a carboxylic acid. In this case, benzaldehyde is converted to benzyl alcohol and benzoic acid.

Question 8

The product of reduction of benzaldehyde is &#8230;..&#10;A)Benzoic acid&#10;B)Benzyl alcohol&#10;C)Benzene&#10;D)Catechol

Accepted Answer

Benzaldehyde is reduced to benzyl alcohol. This reaction typically involves the addition of hydrogen to the carbonyl group of benzaldehyde, converting the C=O group into a C-OH group.

Question 9

Alkenes convert into alcohols by…… A)Hydrolysis by dil. Sulphuric acid B)Hydration of alkene by alkaline KMnO₄ C)Hydrolysis by water vapours and conc. Sulphuric acid D)Hydration of alkene by aqueous KOH

Accepted Answer

The answer of Alkenes convert into alcohols by&#8230;&#8230;&#10;A)Hydrolysis by dil....

Question 10

Acetic acid and CH₃ are obtained on large scale by destructive distillation of….. A)Wood B)Coal C)Turpentine D)Crude oil

Accepted Answer

Acetic acid and methanol (implied by the chemical formula CH3OH, which seems to be obfuscated in the question as "CH₃") are obtained on a large scale by the destructive distillation of wood, a process that breaks down the organic material in the absence of oxygen to produce these chemicals among others.

Question 11

Acid catalyzed hydration of alkenes except ethene leads to the formation of &#8230;&#8230;&#10;A)Primary alcohol&#10;B)Secondary or tertiary alcohol&#10;C)Mixture of primary and secondary alcohols&#10;D)Mixture of secondary and tertiary alcohols

Accepted Answer

The answer of Acid catalyzed hydration of alkenes except ethene...

Question 12

The boiling point of alcohol are &#8230;. than corresponding thiols.&#10;A)More&#10;B)Same&#10;C)Either of these&#10;D)Less

Accepted Answer

The answer of The boiling point of alcohol are &#8230;....

Question 13

Methyl alcohol can be distinguished from ethyl alcohol using &#8230;&#8230;&#10;A)Fehling solution&#10;B)Schiff's reagent&#10;C)Sodium hydroxide and iodine&#10;D)Phthalein fusion test

Accepted Answer

The answer of Methyl alcohol can be distinguished from ethyl...

Question 14

A compound X with molecular formula C₃H₈O can be oxidised to a compound Y with the molecular formula C₃H₆O₂ X is most likely to be ….. A)Primary alcohol B)Secondary alcohol C)Aldehyde D)Ketone

Accepted Answer

The answer of A compound X with molecular formula C₃H₈O...

Question 15

On heating glycerol with conc. H₂SO₄ a compound is obtained which has a bad odour. The compound is….. A)Glycerol sulphate B)Acrolein C)Formic acid D)Allyl alcohol

Accepted Answer

The answer of On heating glycerol with conc. H₂SO₄ a...

Question 16

Isopropyl alcohol on oxidation forms&#8230;&#8230;&#10;A)Acetone&#10;B)Ether&#10;C)Ethylene&#10;D)Acetaldehyde

Accepted Answer

The answer of Isopropyl alcohol on oxidation forms&#8230;&#8230;&#10;A)Acetone&#10;B)Ether&#10;C)Ethylene&#10;D)Acetaldehyde...

Question 17

The alcohol that produces turbidity immediately with ZnCl₂ + conc. HCl at room temperature….. A)1-hydroxybutane B)2-hydroxybutane C)2-hydroxy-2-methylpropane D)1-hydroxy-2-methylpropane

Accepted Answer

The answer of The alcohol that produces turbidity immediately with...

Question 18

The reagent which easily reacts with ethanol and propanol is&#8230;&#8230;&#10;A)Fehling solution&#10;B)Grignard reagent&#10;C)Schiff's reagent&#10;D)Tollen's reagent

Accepted Answer

The answer of The reagent which easily reacts with ethanol...

Question 19

Propene is the product obtained by dehydrogenation of &#8230;&#8230;.&#10;A)2-propanol&#10;B)1-propanol&#10;C)Propanal&#10;D)n -propyl alcohol

Accepted Answer

The answer of Propene is the product obtained by dehydrogenation...

Question 20

Which of the following statements is correct&#8230;..&#10;A)Phenol is less acidic than ethyl alcohol&#10;B)Phenol is more acidic than ethyl alcohol&#10;C)Phenol is more acidic than carboxylic acid&#10;D)Phenol is more acidic than carbonic acid

Accepted Answer

The answer of Which of the following statements is correct&#8230;..&#10;A)Phenol...

Question 21

Boiling point of alcohol is comparatively higher than that corresponding alkane due to&#8230;&#8230;.&#10;A)Intermolecular hydrogen bonding&#10;B)Intramolecular hydrogen bonding&#10;C)Volatile nature&#10;D)None of these

Accepted Answer

The answer of Boiling point of alcohol is comparatively higher...

Question 22

The reaction of C₂H₅OH with H₂SO₄ does not give …… A)Ethylene B)Diethyl ether C)Acetylene D)Ethyl hydrogen sulphate

Accepted Answer

The answer of The reaction of C₂H₅OH with H₂SO₄ does...

Question 23

In reaction of alcohols with alkali metal, acid etc. which of the following alcohol will react fastest&#8230;.&#10;A)Secondary&#10;B)Tertiary&#10;C)Primary&#10;D)All equal

Accepted Answer

The answer of In reaction of alcohols with alkali metal,...

Question 24

Order of reactivity of alcohols towards sodium metal is …… A)Pri > Sec > Ter B)Pri > Sec Ter D)Pri < Sec < Ter

Accepted Answer

The answer of Order of reactivity of alcohols towards sodium...

Question 25

The -OH group of methyl alcohol cannot be replaced by chlorine by the action of&#8230;&#8230;&#10;A)Chlorine&#10;B)Hydrogen chloride&#10;C)Phosphorus trichloride&#10;D)Phosphorus pentachloride

Accepted Answer

The answer of The -OH group of methyl alcohol cannot...

Deck 6: Industrial Preparation and Properties of Alcohols