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Organic chemistry

Total questions: 58

Worksheet time: 52mins

Name
Class
Date
1.

-COOH is the functional group for...

a)

alcohols

b)

esters

c)

carboxylic acids

d)

amides

2.

-COO is the functional group for...

a)

alcohols

b)

esters

c)

carboxylic acids

d)

amides

3.

-OH is the functional group for...

a)

alcohols

b)

esters

c)

carboxylic acids

d)

amides

4.

alkene + ? --> alcohol

a)

hydrogen

b)

oxygen

c)

water

d)

carbon dioixde

5.

alcohol + ? --> carboxylic acid

a)

hydrogen

b)

oxygen (oxidising agent)

c)

water

d)

carbon dioixde

6.

Name the polymer formed from this monomer

a)

chloroethene

b)

chloroethane

c)

dichloroethene

d)

dichloroethane

7.
The molecular formula for Heptane is
a)
C4H10
b)
C8H18
c)
C5H12
d)
C7H16
8.

C5H12 + Br2 --> C5H11Br + HBr

This reaction is called____________________.

a)

Substitution

b)

Addition

c)

Cracking

d)

Combustion

9.

Which reaction is not an electrophilic addition ?

a)

A

b)

B

c)

C

d)

D

10.

Which of these always applies to a nucleophile

a)

A

b)

B

c)

C

d)

D

11.

Bromine reacts with ethene to form 1, 2-dibromoethane.

What is the correct description of the organic intermediate in this reaction ?

a)

It has a negative charge

b)

It is a free radical

c)

It is a nucleophile

d)

It is an electrophile

12.
a)

A

b)

B

c)

C

d)

D

13.

Which pair of homologous series have the same C:H ratio in their general formula


1) Aldehydes and Ketones

2) Carboxylic acids and esters

3) Alkenes and Ketones

a)

A

b)

B

c)

C

d)

D

14.
a)

A

b)

B

c)

C

d)

D

15.
a)

A

b)

B

c)

C

d)

D

16.
a)

A

b)

B

c)

C

d)

D

17.

Name this carboxylic acid

a)

ethanoic acid

b)

prpoanoic acid

c)

butyl butanoate

d)

butanoic acid

18.

Name this ester

a)

ethyl ethanoate

b)

propyl ethanoate

c)

methyl ethanoate

d)

ethyl methanoate

19.

what is IUPAC name of following structure tert. butyl alcohol?

a)

2 - methoxy propane

b)

2 - methyl 2 - propanol

c)

2 - methyl propanol

d)

2 - methoxy butane

20.

What is IUPAC name of following structure?

a)

Butan - 1,4 - dioic acid

b)

Prop - 1,3 - dioic acid

c)

Pent - 1,4 - dioic acid

d)

ethan - 1,2 - dioic acid

21.
Name the compound
a)
2 - dimethylpropane
b)
2 - methylbutane
c)
2,2 - dimethylpropane
d)
2,2 - dimethylpentane
22.
what kind of molecule is this?
a)
alkane
b)
alkene
c)
alkyne
d)
cycloalkane
23.

Select the correct name of the following formula. C6H10

a)

Hexane

b)

Hexene

c)

Hexanol

d)

Hexyne

24.

Select the correct name of the following formula. C6H11NH2

a)

Hexanamine

b)

Hexene

c)

Hexenol

d)

Hexenamine

25.
a)

A

b)

B

c)

C

d)

D

26.
What is the structure of 2-methyl pent-2-ene ?
a)
a
b)
b
c)
c
d)
d
27.

Name the following molecule:

a)

3,3-dimethyl-1-butanol

b)

3,3-methyl-1-butanol

c)

2,2-dimethyl-4-butanol

d)

3,3,3-trimethyl-1-propanol

28.

Which is the structures with IUPAC nomenclature


2,2,4-trimethylpentane

a)
b)
c)
d)
29.
Name this molecule:
a)
trifluoro-1-methylmethane
b)
1,1,1-trifluoromethane
c)
trifluorethane
d)
1,1,1-trifluoroethane
30.

molecule with the same molecular structure but different structural formula

a)

fats

b)

lipids

c)

fossil fuels

d)

isomers

31.

Reagent needed to change an alcohol to an alkene

a)

concentrated H2SO4

b)

KOH (alc)

c)

water/dilute H2SO4

d)

Cr2O72-/H+

32.

When the HBr is added to propene the product/ products formed is/are

a)

2-bromopropane

b)

Propanamine

c)

1- bromopropane

d)

2-bromopropane and 1- bromopropane

33.

Type of reaction (unbalanced).

CH3CH2OH → CH2=CH2

a)

acid base

b)

substitution

c)

elimination

d)

oxidation

34.

Turns MnO4- from purple to brown

a)

alkane

b)

alcohol

c)

amine

d)

alkene

35.

Which reagent is needed to change CH3CH=CH2 to CH3CHClCH3

a)

Cl2 (aq)

b)

HCl

c)

SOCl2

d)

PCl3

36.

Colour change when Br2 water is added to Butene

a)

purple to brown

b)

purple to colourless

c)

orange to green

d)

orange to colourless

37.

Nucleophile is a species that should have

a)

Positive charge

b)

A pair of electrons to donate

c)

Electron deficient species

38.

How many sigma and pi bonds are present in CH2=C=CHCH3

a)

6 sigma and 2 pi

b)

9 sigma and 2 pi

c)

7 sigma and 4 pi

39.

The stability of carbocation follows the order:

a)

Primary> Secondary>Tertiary> Methyl

b)

Secondary>Tertiary> Primary> Methyl

c)

Tertiary > Secondary> Primary > Methyl

40.

Chemical species bearing a negative charge on carbon and possessing eight electrons in its valence shell are called ------------.

a)

Carbocations

b)

Carbanions

c)

Free radicals

41.

Heterolytic fission results in the formation of-

a)

Cations

b)

Anions

c)

Both cations and anions

42.

Nucleophiles donate its pair of electrons to electron deficient species and hence behave as:

a)

Lewis bases

b)

Lewis acids

c)

Bronsted acids

43.

The change in hybridization affects electronegativity of carbon. Arrange C(sp3), C(sp2) and C(sp) in the increasing order of electronegativity.

a)

C(sp3)<C(sp2) <C(sp)

b)

C(sp3)< C(sp) <C(sp2)

c)

C(sp)< C(sp2) <C(sp3)

44.

Carbocations have ------------- shape with positively charged carbon being sp2 hybridised.

a)

Tetrahedral

b)

Trigonal planar

c)

linear

45.

What is the name for this compound?

a)

4 - propylnonane

b)

4 - ethylnonane

c)

4 - propyloctane

d)

4 - ethyloctane

46.
Name the following
a)
4-ethyl-6-methyl nonane
b)
3-propyl-5-methyl octane
c)
2,4-dipropyl hexane
d)
4-ethyl-2-propyl heptane
47.

Give the IUPAC name for the following compound:

a)

1,1-dethyl-2,2-dimethylpropane

b)

2,2-diethyl-1,1,1-trimethylethane

c)

3-ethyl-2,2-dimethylpentane

d)

3-ethyl-4,4-dimethylpentane

48.

Give the IUPAC name for the following compound:

a)

3-ethyl-5-isopropyl-4,8-dimethylnonane

b)

3-(3-methylbutyl)-7-ethyl-2,4-dimethyheptane

c)

7-ethyl-5-isopropyl-2,6-dimethylnonane

d)

5-(3-methylbutyl)-3-ethyl-4,6-dimethyheptane

49.

Which one of the following mechanisms is not involved in the reaction sequence below?

CH3CH3 → CH3CH2Cl → CH3CH2OH → CH2=CH2 → CH3CH2Br

a)

electrophilic addition

b)

electrophilic substitution

c)

nucleophilic substitution

d)

free-radical substitution

50.

Which of the following is NOT true about nucleophiles?

a)

donates an electron pair to an electrophile to form a chemical bond

b)

all molecules or ions with a free pair of electrons or at least one pi bond can act as nucleophiles

c)

nucleophile are Lewis acids by definition

d)

a nucleophile becomes attracted to a full or partial positive charge

51.

Which of the following statement is INCORRECT about electrophiles?

a)

Electrophiles are positively charged or neutral species having vacant orbitals

b)

The electrophiles are attacked by the most electron-populated part of one nucleophile

c)

Electrophiles are Lewis base

52.

What is the mechanism of the reaction between ethane and chlorine in sunlight?

a)

Free radical substitution

b)

Free radical addition

c)

Electrophilic substitution

d)

Electrophilic addition

53.

Which of the following free radical is the most stable?

a)
b)
c)
d)
54.
a)

A

b)

B

c)

C

d)

D

55.

How to determine that a molecule exhibit cis-trans isomerism?

a)

Restricted rotation in a carbon-carbon single bond of alkenes

b)

Each carbon of a site of restricted rotation has 2 different atoms or groups attached to it

c)

Exist in cyclic compouds only

d)

Similar chemical properties

56.

Isomerism that arises out of the difference in spatial arrangement of atoms or groups about the doubly bonded carbon atoms are called?

a)

Structural Isomerism

b)

Stereoisomerism

c)

Geometrical Isomerism

d)

Optical Isomerism

57.

types of stereo-isomerism are optical isomerism and

a)

cis-isomerism

b)

trans-isomerism

c)

cis-trans isomerism

d)

all of them

58.

A polar molecule will have

a)

A difference in electronegativity

b)

The same electronegativity

c)

Symmetry

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