Chemistry Chapter 16 Entry Test MCQs
26. Acid catalyzed hydration of alkenes except ethene leads to the formation of
a. Secondary or tertiary alcohol
b. Primary alcohol
c. Mixture of secondary and tertiary alcohols
d. Mixture of primary and secondary alcohols
27. 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. Aldehyde
b. Primary alcohol
c. ether
d. Secondary alcohol
28. An organic liquid A containing C, H and O has a pleasant odour with a boiling point of 78°C. On boiling A with conc. H2SO4 a colourless gas is produced which decolourises bromine water and alkaline KMnO4. One mole of this gas also takes one mole of H2. The organic liquid A is
a. C2H6
b. C2H5Cl
c. C2H5OH
d. CH3CHO
29. Which statement is not correct about alcohol
a. Alcohol evaporates quickly
b. Alcohol of less no. of carbon atoms is less soluble in water than alcohol of high no. of C- atoms
c. Alcohol is lighter than water
d. All of these
30. The boiling point of glycerol is more than propanol because of
a. Resonance
b. Hydrogen bonding
c. Chain length
d. Hybridization
31. Read the incorrect statement carefully:
a. Methanol reacts with iodine and sodium hydroxide to give a yellow precipitate of iodoform
b. A secondary alcohol on oxidation gives a ketone
c. Hydrogen gas is liberated when sodium is added to alcohol.
d. Ethanol reacts with conc. H2SO4 at 180°C to yield ethylene
32. The reaction between an alcohol and an acid with the elimination of water molecule is called
a. Etherification
b. Esterification
c. Elimination
d. Saponification
33. A compound A on oxidation gave acetaldehyde, then again on oxidation gave acid. After first oxidation it was reacted with ammonical AgNO3 then silver mirror was produced. A is likely to be
a. Acetaldehyde
b. Primary alcohol
c. Acetone
d. Tertiary alcohol
34. The residue obtained after the crystallization of sugar from concentrated sugar cane juice is called
a. Ethanol
b. Mother liquor
c. Molasses
d. Filterate
35. Rectified spirit is a mixture of
a. 90% ethyl alcohol + 10% water
b. 95% ethyl alcohol + 5% water
c. 95% methyl alcohol + 5% water
d. 95% ethyl alcohol + 5 % methanol
36. In order to make alcohol undrinkable pyridine and methanol are added to it. The resulting alcohol is called
a. Denatured spirit
b. Power alcohol
c. Poison alcohol
d. Proof spirit
37. Which of the following alcohol undergo esterification more readily?
a. CH3CH2CH(CH3)OH
b. CH3CH(OH)CH3
c. CH3CH2OH
d. CH3OH
38. The product obtained by the reaction of ethanol and ethanoyl chloride is:
a. Ethylacetate
b. Diethyl ether
c. Ethyl propanoate
d. Dimethyl ether
39. The alcohol which does not react with Lucas reagent is
a. tert-butyl alcohol
b. isobutyl alcohol
c. sec-butyl alcohol
d. n-butanol
40. Oxygen Containing Organic Compounds Upon Oxidation Forms a Carboxylic Acid as the Only Organic Product with its Molecular Mass higher by 14 Units. What is the Organic Compound?
a. A secondary alcohol
b. A primary alcohol
c. An aldehyde
d. A ketone
41. Catalytic Dehydrogenation of Primary Alcohol gives
a. Alcohol
b. Ketone
c. Ester
d. Aldehyde
42. Which of the following is true?
a. Higher alcohols are liquid at room temperature and the lower ones are solid
b. Lower alcohols are liquid at room temperature and the higher ones are solid
c. Both lower and higher alcohols are solid at room temperature
d. Lower alcohols and higher alcohols, both are liquid at room temperature
43. Which one of the following is termed as benzyl alcohol?
a. C6H5CH2OH
b. C6H5OH
c. C6H5COOH
d. C6H5CH(OH)2
44. In CH3CH2OH, the bond that undergoes heterolytic cleavage most readily is:
a. C – H
b. C – C
c. O – H
d. C – O
45. Which alcohol will undergo dehydration easily to give alkene in the presence of acidic dichromate?
a. Tertiary alcohol
b. Primary alcohol
c. Secondary alcohol
d. All above
46. What will be the product formed when 2-methyl-2-propanol reacts with K2Cr2O7/H2SO4?
a. 2-methyl propene
b. Propanone
c. 2-methyl propanal
d. 2-methyl propanone
47. An organic compound X on treatment with acidified K2Cr2O7 gives a compound Y which reacts with I2 and sodium carbonate to form tri-iodomethane The Compound X is
a. CH3CHO
b. CH3OH
c. CH3CH(OH)CH3
d. CH3-CO-CH3
Phenols
48. Phenol is used in the manufacture of
a. Nylon
b. Bakelite
c. PVC
d. Polystyrene
49. Which of following is phenolic
a. Picric acid
b. Phthalic acid
c. Phenylacetic acid
d. Phosphoric acid
50. Which of the following statements is correct?
a. Phenol is more acidic than ethyl alcohol
b. Phenol is less acidic than ethyl alcohol
c. Phenol is more acidic than carbonic acid
d. Phenol is more acidic than carboxylic acid