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Heterocyclic compounds

Total questions: 50

Worksheet time: 23mins

Name
Class
Date
1.

Heteroatom present in morpholine is

a)

O and S

b)

S and N

c)

N and N

d)

O and N

2.

Tetrahydropyrrole is also called as

a)

Pyrroline

b)

Pyrrole

c)

Pyrrolidine

d)

Pyridine

3.

Which of the following is structure of thiazole

a)

b)

c)

d)

4.

Identify thiophene

a)

b)

c)

d)

5.

Identify Indole structure

a)

b)

c)

d)

6.

heterocycle present in adenine base of DNA is

a)
purine
b)
thymine
c)
guanine
d)
pyrimidine
7.

Which of the following is structure of tetrahydrofuran

a)

b)

c)

d)

8.

What is the heteroatom present in pyrimidine?

a)

Sulphur

b)

Carbon

c)

Nitrogen

d)

Oxygen

9.

Heterocyclic compound structure contain

a)

benzene ring

b)

cyclic ring

c)

cyclic ring with one heteroatom

d)

all of these

10.

Basicity order of following hereocyclic compound is

a)

thiophene > furan > pyrrole

b)

thiophene > pyrrole > furan

c)

pyrrole > furan > thiophene

d)

pyrrole > thiophene > furan

11.

Furan when react with acetic anhydrides and lewis acid yield

a)

2-acetyl furan

b)

3-acetyl furan

c)

4-acetyl furan

d)

all of these

12.

Which is most reactive in electrophilic aromatic substitution?

a)

furan

b)

oxazole

c)

pyrrole

d)

thiazole

13.

Electrophilic substitution in furan usually occurs at

a)

the O atom

b)

both the C2 & C3 atoms

c)

the C2 atom

d)

the C3 atom

14.

preferential order for numbering of more than one heterocycle if present in ring is

a)

N < S < O

b)

N < O < S

c)

S < N < O

d)

order alphabetcally

15.

a)

isoquinoline

b)

imidazole

c)

quinoline

d)

pyridazine

e)

thiazole

16.

a)

pyridazine

b)

pyridine

c)

pyrimidine

d)

pyrrole

e)

pyrazine

17.

a)

pyridine

b)

pyrazine

c)

pyridazine

d)

pyrimidine

e)

pyrrole

18.

a)

pyrimidine

b)

pyridazine

c)

pyridine

d)

pyrrole

e)

quinoline

19.

a)

quinoline

b)

isoquinoline

c)

indole

d)

pyridine

e)

pyrrole

20.

which of the following reagent will react with furan to form 2-furan sulphonic acid

a)

dil. H2SO4 at 100oC

b)

oleum

c)

SO2 at 100oC

d)

SO2 in pyridine at 100oC

21.

the common prepartion method from which pyrrole, furan and thiophene are synthesise

a)

Hantzsch synthesis

b)

Knoor synthesis

c)

Paul - knorr synthesis

d)

paul - Hantzsch

22.

The corrrect aromaticity order is

a)

Thiophene > Benzene > Pyrrole > Furan

b)

Thiophene > Benzene > Furan > Pyrrole

c)

Benzene > Thiophene > Furan > Pyrrole

d)

Benzene > Thiophene > Pyrrole > Furan

23.

Which of the follwoing is an essential aminoacid

a)

b)

c)

d)

All of the above

24.

The main product formed in the chichibabin reaction

a)

3 - amino pridine

b)

2 - amino pridine

c)

4 - amino pridine

d)

2, 3 - diamino pridine

25.

Proteins are the polymers of

a)

amino amides

b)

β - Amino acids

c)

α − \alpha\ -\ Aminoacids

d)

Amides

26.

Biuret test used for the detection of

a)

Saturated oils

b)

Proteins

c)

Carbohydrates

d)

Fats

27.

The nature of pyrrole and amino acids are

a)

Amphoteric

b)

Acidic, Basic

c)

Basic, acidic

d)

Neutral

28.

Pyridine has a delocalised molecular orbital containing

a)

4 electrons

b)

5 electrons

c)

6 electrons

d)

8 electrons

29.

in Pyrrole electrophilic substitution takes place predominantly at

a)

at 2nd position

b)

at α - position

c)

at 3rd - position

d)

both a and b

30.

find out the product

a)

b)

c)

d)

All of the above

31.

Pyrrole reacts with benzene diazonium chloride to form

a)

b)

c)

d)

32.

What is the product when thiophene reacts with Br2 in benzene?

a)

2-bromothiophene

b)

3-bromothiophene

c)

2,5-dibromothiophene

d)

3,4-dibromothiophene

33.

The decreasing order of the reactivity of the following compounds towards electrophiles is:


a)

I > II > III

b)

I > III > II

c)

III > II > I

d)

III > I > II

34.

Furfural on heating with ZnO/Cr2O3 gives

a)

Furoic acid

b)

Furan

c)

Furoic anhydride

d)

All of the above

35.

Furan + PhLi ------> A + B

A + CO2 -----> C

B + CH3Cl ------> no reaction without catalyst Findout A, B and C

a)

A = 3- lithio furan, B = Benzene, C = 3 - Furoic acid

b)

A = 2- lithio furan, B = Benzene, C = 2 - Furoic acid

c)

A = Benzene, B = lithio furan, C = 2- Furoic acid

d)

both A and B

36.

Which base is present in RNA but not in DNA ?

a)

Gaunine

b)

Cytosine

c)

Uracil

d)

Thymine

37.

what is P

a)

N - Methyl pyrrole

b)

2 - Methyl pyrrol

c)

2,3 - dimethyl pyrrole

d)

2, 4 - dimethyl pyrrole

38.

in pyridine electrophilic and nucleophilc substitution reactions occurs at

a)

C -3, C -2

b)

C -2, C -3

c)

C -2, C -4

d)

C -3, C -4

39.

conversion of pyridine to piperidine

a)

LiAlH4

b)

Na/liq.NH3

c)

Na/C2H5OH

d)

HI/Red P

40.

Father of Organic chemistry

a)

Jacob Berzelius

b)

Friedrich Wohler

c)

Kolbe

d)

Van't Hoff

41.

(a)   containing component is selected as base component for IUPAC naming

42.

Which of the following is not example of hetero atom

a)

Carbon

b)

Oxygen

c)

Nitrogen

d)

Sulphur

43.

tick on the Heterocyclic compounds from the list

a)

Thiophene

b)

Glucose

c)

Pyrol

d)

Benzene

44.

Select all the compounds that are having five membered ring?

a)

Thiophene

b)

Pyrol

c)

Pyrridine

d)

Furan

45.

Molecular formula of pyrrole is

a)

C4H4S

b)

C4H4N

c)

C5H5S

d)

C5H5N

46.

Write the name of the reaction

a)

Gattermann koch reaction

b)

Reimer tiemann reaction

c)

Pall Knorr synthesis

d)

Fischer Indole synthesis

47.

Which is NOT TYPICAL of pyrrole?

a)

Its electron system contains 6 electrons.

b)

Its aromatic electron structure is distorted.

c)

N atom gives 2 electrons to the aromatic ring.

d)

It is gaseous under standard circumstances.

e)

It can react with bromine at room temperature.

48.

Which pairing is CORRECT?

a)

pyridine - haemoglobin

b)

pyrimidine - guanine

c)

pyrrole - chlorophyll

d)

imidazole - cytosine

e)

purine - amino acid

49.

Reaction of pyrrole with conc.H2So4 undergoes Sulphonation gives

a)

2 sulpho pyrrole

b)

2 pyrrole sulphonic acid

c)

3 sulpho pyrrole

d)

3 pyrrole sulphonic acid

50.

Furan on hydrogenation gives

a)

Tetrahydrofuran

b)

Piperidine

c)

Pyrrolidene

d)

None

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