Chemistry Chapter 16 Entry Test MCQs
Topic 16
Alcohols
1. Which of the following can be prepared from molasses by fermentation process?
a. Acetaldehyde
b. Ethyl alcohol
c. Formic acid
d. Acetic acid
2. Which of the following types of enzymes is required to convert starch into maltose
a. Diastase
b. Invertase
c. Lipase
d. Zymase
3. The order of reactivity of alcohols towards halogen acid is
a. Primary = secondary = tertiary
b. Primary > secondary > tertiary
c. Primary > secondary > tertiary
d. Tertiary > secondary > primary
4. ROH + R-COOH H2SO4 R-COOR + H2O The order of reactivity of alcohols in the above case is:
a. Primary alcohol > Sec-alcohol > Ter-alcohol
b. Ter-alcohol > Sec-alcohol > Primary alcohol
c. Sec-alcohol > Primary alcohol > Ter-alcohol
d. Primary alcohol > Ter-alcohol > Sec-alcohol
5. Which of the following give iodofom test?
a. Methanal
b. CH3OH
c. 1-propanol
d. C2H5OH
6. The dehydration of alcohol in the presence of Conc. H2SO4 at 170oC involves:
a. A carbonium ion intermediate
b. Free radical intermediate
c. A carbanion intermediate
d. Addition of OH- ion
7. The formula of starch is
a. (C6H10O5)n
b. C12H22O11
c. C6H12O6
d. C6H10O5
8. K2Cr2O7/H2SO4 generate
a. Nascent hydrogen[H]
b. Nascent oxygen[O]
c. Oxygen
d. Hydrogen
9. The oxidation of isopropyl alcohol will yield
a. Propanone
b. Propane
c. Propanoic acid
d. Propanol
10. Methanol can be obtained from
a. Methane
b. Water gas
c. Destructive distillation of wood
d. All
11. Lucas reagent is
a. Dilute HCl + hydrated ZnCl2
b. Concentrated HCl + anhydrous ZnCl2
c. Concentrated HCl + anhydrous MgCl2
d. Concentrated HNO3 + anhydrous ZnCl2
12. Cyclohexanol is a
a. Tertiary alcohol
b. Primary alcohol
c. Phenol
d. Secondary alcohol
13. Methylated spirit is
a. Methanoic acid
b. Methanol
c. Methanamide
d. Methanol + ethanol
14. The product of intermolecular as well as intramolecular dehydration of ethanol in the presence of conc. H2SO4 is:
a. Dethyl ether, ethane
b. Alkyl hydrogen sulphate, aldehyde
c. Ethene, aldehyde
d. Diethyl ether, ethene
15. A compound X of formula C2H6O yield a compound C2H4O, on oxidation. To which one of the following classes of compounds could X belong:
a. Aldehyde
b. ether
c. Alcohol
d. both b and c
16. Molecular formula of amyl alcohol is
a. C5H12O
b. C7H14O
c. C5H10O
d. C6H13O
17. Absolute alcohol is
a. 95% alcohol + 5% H2O
b. 100% pure ethanol
c. 95% ethanol + 5% methanol
d. Ethanol + water + phenol
18. Which of the following is dihydric alcohol?
a. Catechol
b. Glycerol
c. Resorcinol
d. Ethylene glycol
19. Wood spirit is known as
a. Acetone
b. Methanol
c. Benzene
d. Ethanol
20. Fermentation is an
a. Reversible reaction
b. Exothermic reaction
c. Endothermic reaction
d. None of these
21. Ethyl alcohol is industrially prepared from ethylene by
a. Catalytic reduction
b. Permanganate oxidation
c. Fermentation
d. Absorbing in H2SO4 followed by hydrolysis
22. The fermentation of starch to give alcohol occurs mainly with the help of
a. Air
b. O2
c. Enzymes
d. CO2
23. Which enzyme converts glucose and fructose both into ethanol
a. Zymase
b. Diastase
c. Maltase
d. Invertase
24. In the commercial manufacture of ethyl alcohol from starchy substances by fermentation method, which enzymes stepwise complete the fermentation reaction
a. Maltase, zymase and invertase
b. Diastase, maltase and zymase
c. Diastase, invertase and zymase
d. Diastase, zymase and lactase