Chapter 12 Aldehydes and Ketones MCQs

Aldehydes and Ketones solved MCQs practice

Make your choice.

21.    Aldehyeles having -hydrogen atoms undergo                  reaction.

(a)     Wurtz                   (b)     Aldol           (c)     Cannizzaro          (d)

         Fehling

22.                                                     The example of Halo form is

(a) Chloroform    (b)  Bromo form (c)  Idoform          (d)  All of them

23. In Pakistan, ethanol is prepared by the fermentation of

(a)  Molasses     (b)  Starch grains (c)  Fruit juices   (d)  All of them

24. The residue obtained after the crystallization of sugar from conc. Sugarcane juice is called.

(a)  Enzyme                 (b)  Starch           (c)  Diastase                  (d)

Molasses

25.                                                                Alcohols can be obtained by the

_______ of alkenes.

(a) Hydrogenation        (b)  Hydration      (c)  Halogenation (d)  None of them

26. Oxidation of alcohols convert them into

(a)      Aldehycle (b)     Ketones     (c)     Acids          (d) Both a & b

27.    The best reagent for the oxidation of alcohol is

(a)  ZnCl₂                     (b)  Ether             (c)  Acidic dichromate (d)  Pyridine

28. __________ alcohols are resistant to oxidation.

(a)  Primary                  (b)  Secondary    (c)  Tertiary         (d)  Long chain

29. _________ gives iodoform with iodine in the presence of NaOH.

(a)  Methanol      (b)  Ethanol                  (c)  Propanol       (d) Butonol

30.    Phenol reacts with acetyl chloride in the presence of a base to form

(a)  Acid              (b)  Alkane          (c)  Aldehyde      (d)  Ester

31.    Aqueous solution of phenol reacts with bromine water to give precipitate of 2, 4, 6 tribromophenol.

(a)  White            (b)  Yellow	(c)  Blue              (d)  Green
32.	The IUPAC name of CH3OC6H5  is
(a)  Methoxy methane	(b)  Methoxy ethane
(c)  Ethoxy propane	(d)  Methoxy benzene
33.	The halo form’s reaction using iodine

and aqueous _______ is called the idoform test

(a)   Sod – chloride                                             (b)  Sod – carbonate

Aldehyde functional group

(c)     Sod – hydroxide                                        (d)  Sod - bicarbonate

34.                                                     Idoform is a ________ solid.

(a)  White            (b)  Black             (c)  Yellow                    (d)  Blue

35.    The catalyst used for the catalytic reduction of aldehydes and ketones.

(a)  Pd                  (b)  Pt                             (c)  Ni                             (d)  All of them

36. Aldehydes combine with alcohols in the presence of _________ gas to form acetals.

(a)  Hydrogen     (b)  Carbon dioxide  (c)  Hydrogen chloride    (d)  Chlorine

37. Aldehycles and ketones are easily oxidized by mild oxidizing agents like.

(a)  Tollen’s reagent                       (b)  Fehling’s solution

(c)  Benedict’s solution                   (d)  All of them

38.    An alkaline solution containing a cupric tartarate complex ion is called.

(a) Fehling’s solution	(b) Benedict’s solution
(c)  Tollen’s reagent	(d)  DNPH
39. test.	Aldehydes do not give ___________
(a)  Fehling’s solution	(b)  Benedict’s solution
(c)  Sod – nitroprusside	(d)  I do form
40. of antipoliovaccine. (a)  Formaldehyde	_________ is used in the processing
(b)  Acetaldehyde	(c)  Ether             (d)  Propanone