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Question Bank No: 2

1. Which of the following compounds would have the smallest value for p $K_{a} ?$

a)		CH $F_{2} C H_{2} C H_{2} COOH$
b)		$C H_{3} C H_{2} C F_{2} COOH$
c)		C $H_{2} FCHFC H_{2} COOH$
d)		$C H_{3} C F_{2} C H_{2} COOH$

2. Which of the following does not reduce Tollen's reagent?

a)		$C H_{3} CHO$
b)		$C_{6} H_{5} NHOH$
c)		HCOOH
d)		$C_{6} H_{5} N O_{2}$

3. RCOOH on treatment with PC $l_{5}$ and KCN, is subjected to hydrolysis followed by Clemmenson's reduction, the product obtained is

a)		RC $H_{2} - COCl$
b)		RC $H_{2} - COOH$
c)		RCOCN
d)		RCN

4. Which of the following undergoes Cannizzaro's reaction?

a)		$C_{6} H_{5} CHO$
b)		$C H_{3} CHO$
c)		${CH}_{3} COC H_{3}$
d)		$C_{6} H_{5} OH$

5. Aldehydes and Ketones can be reduced to corresponding hydrocarbons by

a)		Refluxing with water
b)		Refluxing with soda amalgam and water
c)		Refluxing with zinc amalgam and Conc. HCl
d)		Refluxing with strong acids

6. The reaction of an ester RCOOR with an alcohol R"OH in the presence of an acid gives

a)		RCOOH
b)		R'COOH
c)		R"COOR
d)		RCOOR"

7. Identify the reactant X and the product Y
${CH}_{3} - OC {- C H}_{3} + X \to ({CH}_{3})_{3} C - OMg - Cl \overset{hydrolysis}{⟶}$ Y+Mg(OH)Cl

a)		X = MgC $l_{2;}$ Y = ${CH}_{3} CH = {CH}_{2}$
b)		X = ${CH}_{3} MgCl; Y = C_{2} H_{5} COC H_{3}$
c)		X = ${CH}_{3} MgCl; Y = (C H_{3})_{3} C - OH$
d)		X = $C_{2} H_{5} MgCl; Y = (C H_{3})_{3} C - OH$

8. Which of the following compounds forms an addition compound with ${CH}_{3} MgBr,$ which on hydrolysis produce a secondary alcohol

a)		HCHO
b)		${CH}_{3} CHO$
c)		${CH}_{3} OC H_{3}$
d)		${CH}_{3} COC H_{3}$

9. Benzoic acid, when heated with soda lime yields

a)		benzaldehyde
b)		benzene
c)		toluene
d)		benzyl alcohol

10. Which one of the following compounds will dissolve in an alkali solution after it has undergone reaction with Hinsberg reagent?

a)		C $H_{3} N H_{2}$
b)		( ${CH}_{3})_{3} N$
c)		( $C_{2} H_{5})_{2} NH$
d)		$C_{6} H_{5} NH C_{6} H_{5}$

11. The strongest base among the following is

a)		$C_{6} H_{5} N H_{2}$
b)		( $C_{6} H_{5})_{2} NH$
c)		${NH}_{3}$
d)		( $C_{2} H_{5})_{2} NH$

12. The amine which will not liberate nitrogen on reaction with nitrous acid is

a)		trimethyl
b)		ethyl amine
c)		sec-butyl amine
d)		t- butyl amine

13. The number average molecular mass and mass average molecular mass of a polymer are respectively 30,000 and 40,000. The poly dispersity index of the polymer is

a)		$< 1$
b)		$> 1$
c)		1
d)		0

14. Among the amines (a) $C_{6} H_{5} N H_{2}$ (b)C $H_{3} N H_{2}$ (c)(C $H_{3})_{2} NH$ (d)(C $H_{3})_{3} N$ the order of basicity is

a)		a $< b < d < c$
b)		d $< c < b < a$
c)		a $> b > c > d$
d)		b $> c > d > a$

15. Identify the product in the following sequences:3,4,5 - tribromoaniline $⟶_{(2) H_{3} P O_{2}}^{(1) diazotization}$ ?

a)		3,4,5- tribromobenzene
b)		1,2,3- tribromobenzene
c)		2,4,6- tribromobenzene
d)		3,4,5- tribromonitrobenzene

16. Nitration of aniline in strongly acidic medium, result in the formation of m-nitroaniline also. This is because

a)		amino group is meta orienting during electrophilic substitution reaction
b)		nitro group goes always to the meta position irrespective of the substituents
c)		nitration of aniline is a nucleo philic substitution reaction in strongly acidic medium
d)		in strongly acidic conditions aniline is present as anilinium ion

17. The vulcanized rubber has

a)		high water absorption, resistant to oxidation and good elasticity
b)		high water absorption, susceptible to oxidation and no elasticity
c)		high water absorption, susceptible to oxidation and good elasticity
d)		low water absorption, susceptible to oxidation and good elasticity

18. Nitration of aniline is achieved by

a)		direct treatment with nitration mixture under reflux
b)		Acetylation followed by nitration and subsequent hydrolysis
c)		using dil.HN $O_{3}$ in ice
d)		using fuming HN $O_{3}$

19. Give the monomers of Nylon-66

a)		Butadiene and acrylonitrile
b)		Ethylene glycol and terephthalic acid
c)		Hexamethylene diamine and adipic acid
d)		Melamine and formaldehyde

20. If diazotisation of aniline is carried out at $30^{0}$ C, the main organic product formed is

a)		phenol
b)		phenyl isocyanide
c)		diphenyl amine
d)		phenyl hydrazine

21. Which one of the following statements about the nitro group in organic compounds is not correct?

a)		The N atom is s $p^{2}$ hybridised
b)		The N atom forms a N=O bond and a N $\to$ O bond
c)		The two nitrogen - oxygen bond lengths are different
d)		It exists in two canonical forms

22. Which one of the following is a copolymer?

a)		Polyvinyl chloride
b)		Polytetrafluoroethylene
c)		Nylon-66
d)		Natural rubber

23. Aniline first reacts with acetyl chloride producing compound 'A'. 'A' reacts with nitric acid/sulphuric acid mixture and produces compound 'B' which hydrolyzes to compound 'C'. What is the identity of 'C'?

a)		Acetanilide
b)		p-Nitroacetanilide
c)		p-Nitroaniline
d)		Aniline

24. Which of the following is not correct regarding terylene?

a)		step-growth polymer
b)		Synthetic fibre
c)		It is also called Dacron
d)		Thermosetting plastic

25. Teflon is a polymer of

a)		Tetrafluoro ethene
b)		Tetrafluoro propene
c)		Diflurodichloro ethane
d)		Difluro ethane

26. Among the following compounds $C_{3} H_{7} N H_{2}, N H_{3}, C H_{3} N H_{2}, C_{2} H_{5} N H_{2}$ and $C_{6} H_{5} N H_{2},$ the least basic compounds is

a)		N $H_{3}$
b)		C $H_{3} N H_{2}$
c)		$C_{6} H_{5} N H_{2}$
d)		$C_{2} H_{5} N H_{2}$

27. The end product of the reaction
Ethyl amine $\overset{HN O_{2}}{⟶} A \overset{PC l_{5}}{⟶} B \overset{KCN}{⟶} C is$

a)		Ethyl amine
b)		Diethyl amine
c)		Propane nitrile
d)		Triethyl amine

28. Which of the following is not a thermoplastic?

a)		Polystyrene
b)		Teflon
c)		Polyvinyl chloride
d)		Novalac

29. Which one of the following statement is wrong?

a)		The IUPAC name of $[Co (N H_{3})_{6}] C l_{3}$ is Hexamine cobalt(III)chloride
b)		Dibenzol peroxide is a catalyst in the polymerization of PVC
c)		Borosilicate glass is heat resistant
d)		pKa of trichloroacetic acid is less than that of acetic acid

30. Which of the following compounds on treatment first with NaN $O_{2} / HCl$ and then coupled with phenol produces p-hydroxyazobenzene?

a)		Nitrobenzene
b)		Azobenzene
c)		Phenol
d)		Aniline

31. Which of the following is currently used as a tyre cord?

a)		Terelene
b)		Polyethylene
c)		Polypropylene
d)		Nylon 6

32. When aniline is heated with chloroform and alcoholic KOH it gives

a)		( $C_{6} H_{5})_{2} NH$
b)		( $C_{6} H_{5})_{3} N$
c)		( $C_{6} H_{5})_{2} NCl$
d)		$C_{6} H_{5} NC$

33. Identify the product Z in the following reaction scheme
$C_{6} H_{5}$ N $H_{2} \overset{(A C_{2})_{2} O}{⟶}$ X $\overset{B r_{2} / CC l_{4}}{⟶}$ y $\overset{HOH}{⟶}$ Z

a)		p-Bromoaniline
b)		n-Bromoacetophenone
c)		p-Bromoacetanilide
d)		o-Bromoacetophenone

34. The indicator that is obtained by coupling the dragonium salt of sulphanilic acid with N, N-dimethyl aniline is

a)		Indigo
b)		Methyl orange
c)		Methyl red
d)		Phenolphthalein

35. ${CH}_{3} {CH}_{2} Cl$ $\overset{NaCN}{⟶}$ $X \overset{Ni / H_{2}}{⟶} Y ⟶_{anhydride}^{Acetic}$ Z . Z is

a)		${CH}_{3} - {CH}_{2} - {CH}_{2} - NHCO - {CH}_{3}$
b)		${CH}_{3} - {CH}_{2} - {CH}_{2} - N H_{2}$
c)		${CH}_{3} - {CH}_{2} - {CH}_{2} - CO NH - {CH}_{3}$
d)		${CH}_{3} - {CH}_{2} - {CH}_{2} - CO - NH - CO {CH}_{3}$

36. Which of the following reagent can be used to convert benzene diazonium chloride into benzene

a)		${CH}_{3} OH$
b)		$H_{3} {PO}_{2}$
c)		${Br}_{2} - H_{2} O$
d)		$LiAl H_{4}$

37. Reduction of $H_{3} C - NC$ with hydrogen in the presence of $\frac{Ni}{Pt}$ catalyst gives

a)		${CH}_{3} {NH}_{2}$
b)		${CH}_{3} {NHCH}_{3}$
c)		${CH}_{3} {C H_{2} NH}_{2}$
d)		${(CH}_{3})_{3} N$

38. organicompounds-q15
In the above reaction , X stands for

a)		${SnCl}_{2}$
b)		Cl
c)		${NH}_{2}$
d)		${NH}_{3}^{+} {Cl}^{-}$

39. organicompounds-q14 $\overset{{(C H_{3} CO)}_{2} O}{⟶}$ $X \overset{{Br}_{2} / {CH}_{3} COOH}{⟶}$ $Y \overset{H^{+} / H_{2} COOH}{⟶} Z$
In the sequence given above Z is

a)
b)
c)
d)

40. $C_{3} H_{9} N cannot represent$

a)		$1^{o}$ amine
b)		$2^{o}$ amine
c)		$3^{o}$ amine
d)		quaternary salt

41. Which of the following reactions will not give primary amine?

a)		${CH}_{3} {CONH}_{2} \overset{KOH, {Br}_{2}}{⟶}$
b)		${CH}_{3} CN \overset{LiAl H_{4}}{⟶}$
c)		${CH}_{3} N C \overset{LiAl H_{4}}{⟶}$
d)		${CH}_{3} {CONH}_{2} \overset{LiAl H_{4}}{⟶}$

42. In the following reaction X is
X $\overset{Bromination}{⟶} Y ⟶_{+ HCl}^{{NaNO}_{2}} Z ⟶_{C_{2} H_{5} OH}^{Boiling}$ $\underset{Benzene}{Tribromo}$

a)		Benzoic acid
b)		Salicyclic acid
c)		Phenol
d)		Aniline

43. In the diazotisation of aniline with sodium nitrite and hydrochloric acid, the excess of hydrochloric acid is used primarily to

a)		Supress the concentration of free aniline
b)		Supress the hydrolysis to phenol
c)		ensure a stochiometric amount of nitrous acid
d)		neutralise the base liberated

44. Reaction of nitrous acid with aliphatic $1^{o}$ amine in cold gives

a)		A diazonium salt
b)		An alcohol
c)		A nitrile
d)		A dye

45. Which of the following compound gives dye test?

a)		Aniline
b)		Methylamine
c)		Diphenyl amine
d)		Ethylamine

46. Nitrosoamines ( $R_{2} N - N = O)$

a)		Liberman nitroso reaction
b)		Etard's reaction
c)		Fries' reaction
d)		Perkin's reaction

47. Which of the following is least alkaline ?

a)
b)
c)
d)		all are equally basic

48. Arrange the following :
${CH}_{3} {NH}_{2} (1); (C H_{3})_{2} NH (II); C_{6} H_{5} {NH}_{2} (111)$ and (C $H_{3})_{3} N$ (1V) in increasing order of ba - sicity in aqueous medium

a)		11 $< 1 < 1 V < 111$
b)		111 $< 1 V < 1 < 11$
c)		1 $< 11 < 111 < 1 V$
d)		11 $< 111 < 1 < 1 V$

49. In the following reaction
$C_{6} H_{5} {NH}_{2}$ + ${CHCl}_{3} + 3 NaOH \to A + 3 B + 3 C$ ; The Product A is

a)		Phenyl isocyanide
b)		Phenylcyanide
c)		Ethyledene Chloride
d)		HCl or $H_{2} O$

50. Structural formula of ethanenitrile is

a)		$C_{2} H_{5} C \equiv N$
b)		$C H_{3} C \equiv N$
c)		$C_{2} H_{5} N O_{2}$
d)		$C H_{3} N O_{2}$