Top 80+ Solved Alcohol MCQ Questions Answer
Q. The fermentation of starch to give alcohol occurs mainly with the help of ………
a. O2
b. Air
c. CO2
d. Enzymes
Q. Ethanol is prepared industrially by………
a. Hydration of ethylene
b. Fermentation of sugars
c. Both the above
d. None of these
Q. Ethyl alcohol is industrially prepared from ethylene by……..
a. Permanganate oxidation
b. Catalytic reduction
c. Absorbing in H2SO4 followed by hydrolysis
d. Fermentation
Q. Which enzyme converts glucose and fructose both into ethanol……..
a. Diastase
b. Invertase
c. Zymase
d. Maltase
Q. Primary alcohols can be obtained from the reaction of the RMgX……
a. CO2
b. HCHO
c. CH3 CHO
d. H2O
Q. Formaldehyde gives an additive product with methyl magnesium iodide which on aqueous hydrolysisgives …..
a. Isopropyl alcohol
b. Ethyl alcohol
c. Methyl alcohol
d. Propyl alcohol
Q. Benzyl alcohol is obtained from benzaldehyde by…..
a. Fittig's reaction
b. Cannizaro's reaction
c. Kolbe's reaction
d. Wurtz's reaction
Q. The product of reduction of benzaldehyde is …..
a. Benzoic acid
b. Benzyl alcohol
c. Benzene
d. Catechol
Q. Alkenes convert into alcohols by……
a. Hydrolysis by dil. Sulphuric acid
b. Hydration of alkene by alkaline KMnO4
c. Hydrolysis by water vapours and con Sulphuric acid
d. Hydration of alkene by aqueous KOH
Q. Acetic acid and CH3 are obtained on large scale by destructive distillation of…..
a. Wood
b. Coal
c. Turpentine
d. Crude oil
Q. Acid catalyzed hydration of alkenes except ethene leads to the formation of ……
a. Primary alcohol
b. Secondary or tertiary alcohol
c. Mixture of primary and secondary alcohols
d. Mixture of secondary and tertiary alcohols
Q. The boiling point of alcohol are …. than corresponding thiols.
a. More
b. Same
c. Either of these
d. Less
Q. Methyl alcohol can be distinguished from ethyl alcohol using ……
a. Fehling solution
b. Schiff's reagent
c. Sodium hydroxide and iodine
d. Phthalein fusion test
Q. A compound X with molecular formula C3H8O can be oxidised to a compound Y with the molecularformula C3H6O2 X is most likely to be …..
a. Primary alcohol
b. Secondary alcohol
c. Aldehyde
d. Ketone