March 08, 2012

Carbonyl Compounds One Mark Questions

1. A Cyanohydrin of a compound X on hydrolysis gives lactic acid. X is
a) HCHO              b) CH3CHO               c) (CH3)2CO              d) C6H5CH2CHO.
2. Aldol is
a)   2-hydroxy butanol                              b) 3-hydroxy butanol
c) 3-hydroxy butanal                                 d) 2-hydroxy butanal.
3. Calcium acetate + calcium benzoate              ?
a) benzophenone    b) benzaldehyde         c) acetophenone          d) phenyl benzoate
4. Compound which undergoes iodoform test is
a) 1-pentanol         b) 2-pentanone            c) 3-pentanone            d) pentanal.
5. Concentrated solution of sodium acetate on electrolysis gives
a) ethane                b) propane                   c) methane                   d) butane.
6. Hydrogenation of benzoyl chloride in the presence of Pd and BaSO4 gives
a) phenol               b) benzoic acid            c) benzvl alcohol         d) benzaldehyde.
7. Propanone is / Methyl ketones are (usually) characterised by
a) Fehling’s solution b) Iodoform test      c) Schiff ’s test            d) Tollen’s reagent.
8. Oil of bitter almonds is
a) nitrobenzene      b) benzaldehyde          c) methyl salicylate     d) aspirin.
9. Schiff’s reagent gives pink colour with
a) acetone              b) acetaldehyde           c) ethanol                    d) ether. /
      a) acetone              b) acetaldehyde           c) ethyl alcohol            d) methyl acetate
10. Tertiary butyl alcohol can be prepared by the treating methyl magnesium iodide with
a) formaldehyde (HCHO)                        b) acetaldehyde (CH3CHO)
c) acetone (CH3COCH3)                       d) carbon dioxide (CO2)
11. The compound that does not answer iodoform test is
a) acetophenone    b) isopropyl alcohol     c) 2-pentanol               d) benzophenone.
12. The compound that does not reduce Fehling solution is
a) formaldehyde    b) acetaldehyde           c) benzaldehyde          d) propionaidehyde.
13. The compound that does not undergo Cannizzaro reaction is
a) Formaldehyde   b) Acetaldehyde         c) Benzaldehyde           d) Trimethyl acetaldehyde
14. The compound used in the preparation of the tranquilizer sulphonal is
a) acetone              b) acetophenone          c) isopropyl alcohol     d) glycol.
15. The compound used in the preparation of triphenyl methane dye is
a) methanol           b) phenyl methanol     c) phenyl methanal      d) ethanol
16. The formation of a cyanohydrin with a ketone is an example of
a) electrophilic substitution                       b) nucleophilic addition
c) nucleophilic substitution                       d) electrophilic addition.
17. Which of the following compounds is oxidised to give ethyl methyl ketone?
a) 2-propanol         b) 2-pentanone            c) 1-butanol                 d) 2-butanol 
18.                Conc. H2SO4

 CH3COCH3                  the product is
a) mesitylene               b) mesityl oxide               c) phorone                     d) paraldehyde

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