CBSE Class 12 Chemistry Alcohols, Phenols and Ethers Quiz 1

1. Which of the following alcohols gives 2-butenc on dehydration byconc. HSO?

A 2-methyl propene-2-ol B 2-methyl 1 -propanol C Butane-2-ol D Butane 1-ol

2. One mole of ethyl acetate on tatment with an excess of LiAlH

A 1 mole acetic acid + 1 mole ethyl alcohol B 1 mole ethyl alcohol + 1 mole methyl alcohol C 2 moles of ethyl alcohol D 1 mole of 2-butanol

3. Which of the following reagents can not, be used to oxidise primary alcohols to aldehydes?

A CrO B KMnO C Pyridinium chlorochromate D Heat in the presence of Cu at 573 K

4. 1-Phenylethanol can be prepared by the reaction of benzaldehyde with

A methyl bromide B ethyl iodide and magnesium C methyl iodide and magnesium (Grignard reagent’s) D methyl bromide and aluminium bromide

5. Which of the following alcohols will give the most stable carbocation during dehydration?

A 2-methyl-1-propanol B 2-methyl-2-propanol C 1-Butanol D 2-Butanol

6. Order of esterification of alcohols are

A 3° > 1° > 2° B 2°> 3° > 1° C 1 ° > 2° > 3° D None of these

7. What happens when tertiary butyl alcohol is passed over heated copper at 300°C?

A Secondary butyl alcohol is formed B 2-methylpropene is formed C 1-butene is formed D Butanol is formed

8. What would be the reactant and reagent used to obtain 2, 4-dimenthyl pentan-3-ol?

A Propanal and propyl magnesium bromide B 3-methylbutanal and 2-methyl magnesium iodide C 2-dimethylpropanone and methyl magnesium odide D 2-methylpropanal and isopropyl magnesium iodide

9. The decreasing order of boiling point of the following alcohols is

A 3-methylbuan-2-ol > 2-methylbutan-2-ol > pentan-1-ol B Pentan-1-ol > 3-methylbutan-2-ol > 2-methylbutan-2-ol C 2-methylbutan-2-ol > 3-methylbutan-2-ol > pentan-1-ol D 2-methylbutan-2-ol > pental-1-ol > 3-methylbutan-2-ol

10. Acid catalysed dehydration of t-butanol is faster than that of n-butanol because

A tertiary carbocation is more stable than primary carbocation B primary carbocation is more stable than tertiary carbocation C t-butanol has a higher boiling point D rearrangement takes place during dehydration of t- butanol