Untitled Document

Question Bank No: 1

1. Which of the following aldehyde contains $α$ $-$ C atom but does not have any $α -$ H atom.

a)		Propionaldehyde
b)		benzaldehyde
c)		Isobutyraldehyde
d)		Formaldehyde

2. Cannizzaro reaction involves

a)		Oxidation of aldehydes
b)		Oxidation as well reduction of aldehyde molecule
c)		Reduction of aldehyde molecule
d)		Rearrangement in aldehyde molecule

3. Which process will give benzaldehyde?

a)		Ethyl formate and phenyl magnesium bromide
b)		Toluene and chromyl chloride
c)		Benzene and HCN in Zn ${Cl}_{2}$ followed by hydrolysis
d)		benzene and ethanoyl chloride

4. A substance A containing three carbon atoms gives white crystalline precipitate with sodium bisulphite solution but does not give red precipitate with Fehling solution. A on reaction with ${NH}_{2} - {NH}_{2} /$ KOH will yield

a)		Propene
b)		Propane
c)		Cyclopropane
d)		Propionic acid

5. Which of the following is produced when formldehde and ammonia react?

a)		Formaline
b)		Formaldimine
c)		Urotropine
d)		Hexamethylene triamine

6. Which of the following process is helpful in synthesizing acetophenone?

a)		Cannizzaro's reaction
b)		Wurtz reaction
c)		Friedel Craft's reaction
d)		Rosenmund's reaction

7. Which of the following compounds will react with ethanolic KCN?

a)		Ethane
b)		Acetone
c)		Chlorobenzene
d)		Benzaldehyde

8. Bimolecular reduction of acetone gives

a)		Diacetone amine
b)		Pinacol
c)		Chloretone
d)		Propane

9. The reaction of acetaldehyde and acetone in the presence of dilute alkali is called

a)		Crossed aldol condensation
b)		Perkin's condensation
c)		aldol condensation
d)		benzoin condensation

10. Which of the following reagent can help in separating a mixture of 2-butanone abd butanol-2.

a)		NaOH
b)		NaCl
c)		NaHS $O_{3}$
d)		All of the above

11. Which of the following ketone will not give yellow precipitate with NaOH/ $1_{2}$

a)		Pentan-2-one
b)		Acetone
c)		Benzophenone
d)		Hexan-2-one

12. Ethanal is treated with ammonia and adduct formed is warmed.The final product is

a)		Acetaldehyde ammonia
b)		Acetaldimine
c)		Tetramethylene hexamine
d)		Ethyl amine

13. Benzaldehyde and malonic acid react to give

a)		Ethanal
b)		Crotonic acid
c)		Cinnamaldehyde
d)		Cinnamic acid

14. Which of the following reagent can distinguished between a acetaldehyde and benzaldehyde?

a)		${NH}_{2} OH$
b)		Benedict's solution
c)		DNP
d)		None of these

15. Among the following, the least reactive aldehyde is

a)		HCHO
b)		$C_{6} H_{5} CHO$
c)		${CH}_{3} CHO$
d)		$C_{2} H_{5} CHO$

16. Which of the following can be used as formylating agent in the presence of AI ${CI}_{3} ?$

a)		HCOOH+HCl
b)		CO+HCl
c)		CO+C $l_{2}$
d)		HCl + $O_{2}$

17. Etard's reaction involves the preparation of benzaldehyde from

a)		Toluene
b)		Ethyl benzene
c)		Benzoyl chloride
d)		Sodium benzoate

18. Aldehydes and ketone can be distinguished by

a)		Bromoform
b)		Solubility in water
c)		Tollen's test
d)		Mollicch test

19. The products formed in the following reaction $C_{6} H_{5} - 0 - {CH}_{3} + HI \underset{\to}{heat}$ , : are

a)		$C_{6} H_{5} {CH}_{3} and HOI$
b)		$C_{6} H_{5} OH and {CH}_{3} 1$
c)		$C_{6} H_{5} 1 and {CH}_{3} OH$
d)		$C_{6} H_{6} and {CH}_{3} O 1$

20. Cannizzaro's reaction is not given by

a)		Triethylacetaldehyde
b)		Acetaldehyde
c)		Benzaldehyde
d)		Formaldehyde

21. The chemical reaction of esters with another alcohols in excess is called

a)		Trans- alcoholisation
b)		Trans -esterification
c)		Esterification
d)		None of these

22. aldehydes-q19
Predict X in above reaction

a)
b)
c)
d)

23. Which reaction yields Bakelite?

a)		Urea with HCHO
b)		Tetramethyl glycol with Hexamethylene diisocyanate
c)		Phenol and HCHO
d)		Ethylene glycol and Dimethylterephthalate

24. In nucleophilic substitution reactions the reactivity of carbonyl compounds follows order.

a)		$H_{2} C = O > R_{2} C = O > {Ar}_{2} C = O > RCHO > ArCHO$
b)		$H_{2} C = O > RCHO > ArCHO > R_{2} CO > {Ar}_{2} C = O$
c)		${Ar}_{2} C = O > R_{2} C = O > ArCHO > RCHO > H_{2} C = O$
d)		$ArCHO > {Ar}_{2} C = O > RCHO > R_{2} CC > H_{2} C = O$

25. Acidic hydrolysis of acetamide gives

a)		Acetaldehyde
b)		Acetic acid
c)		Methyl amine
d)		Formic acid

26. Acompound possessing $α$ hydrogen atom, in the presence of dilute alkali forms $β -$ hydroxy aldehyde. This product on heating with dilute acid forms an unsaturated orotonaldchyde.The compound is

a)		${CH}_{3} CHO$
b)		${{CH}_{3} CH}_{2} CHO$
c)		${CH}_{2} = CH - CHO$
d)		HC $\equiv C - CHO$

27. Which of the following reactants in presence of AlC $l_{3}$ give acetophenone?

a)		Benzene and Acetone
b)		Phenol and Acetone
c)		Phenol and AcOH
d)		Benzene and AcCl

28. In the given reaction X is
${CH}_{3} CHO + {CH}_{2} (COOH)_{2} \overset{Pyridine / Δ}{⟶} X$

a)		${CH}_{3} C O OH$
b)		${C_{2} H}_{5} C O OH$
c)		${CH}_{3} CH = CH - COOH$
d)		(COOH)CH = CH - (COOH)

29. A compound has a molecular formula $C_{2} {Cl}_{3} OH .$ It reduces Fehling solution and on oxidation produces a monocarboxylic acid B. A can also be obtained by the action of ${Cl}_{2}$ on Ethanol. A is

a)		Chloral
b)		${CHCl}_{3}$
c)		${CH}_{3} Cl$
d)		Chloroacetic acid

30. Which of the following decreasing order of acid strength of
(i) Methanoic acid (ii) Ethanoic acid (iii) Propanoic acid (iv) Butanoic acid. is correct?

a)		(i) $>$ (ii) $>$ (iii) $>$ (iv)
b)		(iv) $>$ (iii) $>$ (ii) $>$ (i)
c)		(i) $>$ (iv) $>$ (iii) $>$ (ii)
d)		(iv) $>$ (i) $>$ (ii) $>$ (iii)

31. Which of the following compounds will be opticallyactive?

a)		${(CH}_{3})_{2} CHOH$
b)		${CH}_{3} {CH}_{2} {CH}_{2} {CH}_{3}$
c)		${CH}_{3} - CHCl - COOH$
d)		${(CH}_{3})_{3} CCl$

32. An aromatic ether is not cleaved by HI even at 525 K. The compound is

a)		$C_{6} H_{5} {OCH}_{3}$
b)		$C_{6} H_{5} {OC}_{6} H_{5}$
c)		$C_{6} H_{5} {OC}_{3} H_{7}$
d)		Tetrahydrofuran

33. Which of the following does not react with phenyl hydrazine ?

a)		Ethanol
b)		Ethanal
c)		Acetone
d)		Acetophenone

34. The conversation of ${CH}_{3} OH$ into ${CH}_{3} COOH$ can be brought about by the following reagents

a)		$K_{2} {Cr}_{2} O_{7} / H^{+}$
b)		CO + Rh
c)		KMn $O_{4}$
d)		$H_{3} {PO}_{4}$

35. Reaction of acids with alcohols is also known as

a)		Esterification
b)		Saponification
c)		Alkalisation
d)		None

36. Wacker method involves the conversion of alkene using ${PdCl}_{2}$ into corresponding

a)		Alcohol
b)		Ketone
c)		Aldehyde
d)		Ether

37. Which does not react with Fehling solution?

a)		Acetaldehyde
b)		Propanone
c)		Glucose
d)		Formic acid

38. At room temperature formaldehyde is

a)		Gas
b)		Liquid
c)		Solid
d)		None of the above

39. Formaldehyde when treated with KOH (causic potash) gives methanol and potassium formate, the reaction is known as

a)		Perkin's reaction
b)		Claisen's reaction
c)		Cannizzaro's reaction
d)		Knoevenagel's reaction

40. On heating acetaldehyde with ammonical silver nitrate solution, we get

a)		${CH}_{3} OH$
b)		Silver acetate
c)		HCHO
d)		Silver mirror

41. Paraaldehyde is a trimer of

a)		Formaldehyde
b)		Acetaldehyde
c)		Benzaldehyde
d)		Propionaldehyde

42. Cyanohydrin of which of the following forms lactic acid

a)		$HCHO$
b)		${CH}_{3} {COCH}_{3}$
c)		${CH}_{3} CHO$
d)		${CH}_{3} {CH}_{2} CHO$

43. From the following values of dissociation constants of four acids which value represents the strongest acid?

a)		${2 \times 10}^{- 2}$
b)		${0.02 \times 10}^{- 1}$
c)		${3 \times 10}^{- 4}$
d)		${2 \times 10}^{- 4}$

44. Formation is an aqueous solution of

a)		Furfural
b)		Fluorescein
c)		Formaldehyde
d)		Formic acid

45. Acyl halide is formed by reacting ${PCl}_{5}$ with

a)		Alcohol
b)		Ester
c)		Amide
d)		Both carboxylic acids as well as esters

46. Which of the following statement about benzaldehyde is not true?

a)		reduces Tollen's reagent
b)		undergoes Aldol condensation
c)		undergoes Cannizzaro's reaction
d)		forms an addition compound with sodium hydrogen sulphite

47. Ethyl alcohol reacts with acetyl chloride to form

a)		Ethyl chloride
b)		Acetic acid
c)		Methyl acetate
d)		Ethyl acetate

48. Among the following the strongest acid is

a)		${CH}_{3} COOH$
b)		${CH}_{2} {ClCH}_{2} COOH$
c)		${CH}_{2} ClCOOH$
d)		${CH}_{3} {CH}_{2} COOH$

49. Which of the following is least acidic?

a)		$C_{2} H_{5} OH$
b)		${CH}_{3} COOH$
c)		$C_{6} H_{5} OH$
d)		${ClCH}_{2} COOH$

50. Heating a mixture of sodium benzoate and soda lime gives

a)		Methane
b)		Benzene
c)		Sodium benzoate
d)		Calcium benzoate