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Organic Chemistry Flashcards

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1
Q

Which of the following molecules has maximum number of possible H-atoms?

a) C5H5N
b) C4H9NO
c) C4H7Cl
d) C2H6O

A

d) C2H6O

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2
Q

Hydrocarbons in which atoms of carbon are bound only by sigma bond are:

a) saturated hydrocarbons
b) alkanes
c) very reactive
d) arene

A

a) saturated hydrocarbons

b) alkanes

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3
Q

Carbon atoms can be bound together by the bond:

a) double covalent
b) triple covalent
c) hydrogen
d) nonpolar covalent

A

a) double covalent
b) triple covalent
d) nonpolar covalent

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4
Q

Which pairs of compounds are isomers:

a) CH3 - NH - CH3 and CH3 - CH2 - NH2
b) CH2 = CH - CH2 - CH3 and CH3 - CH = CH - CH3

………………………..O
………………………..I I
c) CH3 - CH2 - C - OH

and
……….O
……….I I
HO - C - CH3

d) H - O - CH3 and CH3 - O - H

A

a) CH3 - NH - CH3 and CH3 - CH2 - NH2

b) CH2 = CH - CH2 - CH3 and CH3 - CH = CH - CH3

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5
Q

From following structures which is trans-isomer:

You can choose between something that looks very tidy and mirrored or something that goes in two different directions.

Two answers from a), b), c), d) are correct!

a) different directions
b) tidy
c) different direction
d) tidy

A

a) different direction
c) different direction

Trans isomer aren’t a mirrored image, they are “splitted”.
___
I I
I I = cis

__I
I = trans

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6
Q

Alkadienes are hydrocarbons:

a) which have general formula the same as alkines
b) which have general formula CnH2n
c) with two double bonds in molecule
d) e.g. 1,3-butadiene

A

a) which have general formula the same as alkines
c) with two double bonds in molecule
d) e.g. 1,3-butadiene

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7
Q

Which of electron configuration corresponds to an exitated state of carbon element:

a) 1s2 2s2 2p2
b) 1s2 2s2 2px1 2py1 2pz1
c) 1s2 2s1 2px1 2py1 2pz1
d) 1s2 2s1 2p3

A

c) 1s2 2s1 2px1 2py1 2pz1

d) 1s2 2s1 2p3

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8
Q

C8H16 can be:

a) 3-, 6-Octadiene
b) 5-Octine
c) Cyclooctane
d) 2-Octene

A

c) Cyclooctane

d) 2-Octene

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9
Q

Triple-bonds of alkines are made of:

a) 3 sigma-bonds
b) 3 pi-bonds
c) 2 pi- and 1 sigma-bond
d) 2 sigma- and 1 pi-bond

A

c) 2 pi- and 1 sigma-bond

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10
Q

Reaction
C6H14 + Br2 –> HBr + C6H13Br is:

a) electrophilic addition
b) halogenation
c) substitution
d) part of a chain reaction

A

b) halogenation
c) substitution
d) part of a chain reaction

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11
Q

Typical chemical reactions of alkenes are:

a) electrophilic additions
b) substitutions
c) radicalic polymerizations
d) redox

A

a) electrophilic additions
c) radicalic polymerizations
d) redox

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12
Q

Which of the following compounds is toluol:

a) 6C-Ring with three double bonds
b) 6C-Ring with three double bonds with two Cl side chains
c) 6C-Ring with three double bonds with one OH side chain
d) 6C-Ring with three double bonds with one CH3 side chain

A

d) 6C-Ring with three double bonds with one CH3 side chain

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13
Q

Aromatic hydrocarbons:

a) Readily undergo addition reactions like alkenes
b) Contain a series of pi-bonds on several consecutive carbon atoms
c) Form a pi-electron cloud
d) Have sp2 hybridized carbon atoms

A

c) Form a pi-electron cloud

d) Have sp2 hybridized carbon atoms

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14
Q

How many isomeres of pentane do exist?

a) 5
b) 4
c) 3
d) 2

A

c) 3

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15
Q 
The proper name after IUPAC of the substance below is: 
...........CH3
............I
...........CH2
............I
CH3 - C - CH2 - CH3
.............I
............CH2
.............I
............CH3

a) 2,2-Diethylbutan
b) 2,2-Dimethylbutan
c) 3,3-Dimethylbutan
d) 3-Ethyl, 3-methylpentan

A

d) 3-Ethyl, 3-methylpentan

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16
Q 
Functional Group: -OH
Name the:
--> name of group:
and 
--> occurs in compound:
A

name of group: hydroxyl

occurs in compound: alcohol, carboxilic acid

17
Q 
Functional Group: >C=O
Name the:
--> name of group:
and 
--> occurs in compound:
A

name of group: carbonyl

occurs in compound: aldehyde, ketone, ester, carboxilic acid

18
Q 
Functional Group: -COOH
Name the:
--> name of group:
and 
--> occurs in compound:
A

name of group: carboxyl

occurs in compound: carboxilic acid

19
Q 
Functional Group: R-COO-R
Name the:
--> name of group:
and 
--> occurs in compound:
A

name of group: ester bond

occurs in compound: ester

20
Q 
Compound with functional group
- C - O - C -
  I I         I I
  O         O
is:
a) ester
b) anhydride
c) hemiacetal
d) acetal
A

b) anhydride

21
Q

Amide of acid has general formula:
a) R - CH - COOH
I
NH2

b) R - COO - NH2
c) R - CO - NH2
d) R - NH - R

A

c) R - CO - NH2

22
Q

Compound H-C=O is:
I
OH

a) oxomethanol
b) ketone
c) hydroxyketone
d) methanoic acid

A

a) oxomethanol

d) methanoic acid

23
Q

Which of the following is an alcohol?

a) CH3CHO
b) C2H5OH
c) CH3COCH3
d) C3H7COOH

A

b) C2H5OH

24
Q

Acetyl is:
a) H-C=O
I

b) CH3-C=O
I

c) CH3-C-O-
I I

d) CH3-COOH

A

b) CH3-C=O

I

25
Q

The formula of soap can be expressed as:

a) R-COONa (R=C17H35)
b) R-COOK (R=C17H35)
c) R-CONa (R=C17H35)
d) R-COK (R=C17H35)

A

a) R-COONa (R=C17H35)

b) R-COOK (R=C17H35)

26
Q

By the addition of water molecule on propene following compound is formed:

a) 2-propanone
b) acetone
c) 2-propanol
d) 1-propanol

A

c) 2-propanol

27
Q

Compound with formula
CH3-CH-CH3
I
OH

a) is secondary alcohol
b) is primary alcohol
c) is tertiary alcohol
d) is 1-propanol

A

a) is secondary alcohol

28
Q

The opposite to the esterification formally is:

a) hydrogenation
b) hydration
c) hydrolysis
d) condensation

A

c) hydrolysis

29
Q

Secondary alcohol is formed by the reduction of:
a) CH2COOH

b) CH3-C=O
I
H

c) CH3-C=O
I
CH3

d) CH3-CH2-C=O
I
CH3

A

c) CH3-C=O
I
CH3

d) CH3-CH2-C=O
I
CH3

30
Q

By the reaction of propanol and ethnic acid following compound is formed:
a) CH3-CH2-CO-O-CH2-CH3

b) CH3-CO-O-CH2-CH2-CH3
c) CH3-CH2-CH2-O-CO-CH3
d) CH3-CH2-O-CO-CH2-CH3

A

b) CH3-CO-O-CH2-CH2-CH3

c) CH3-CH2-CH2-O-CO-CH3

31
Q

General formula of ethers is:

a) R-O-CO-R
b) R-O-R
c) R-O-O-R
d) R-O-H

A

b) R-O-R

32
Q

Which compound can be used for the esterification of CH3CH2-OH:

a) ethanoic acid
b) CH3-COOH
c) CH3-CONH2
d) CH3-CO-CH3

A

a) ethanoic acid

b) CH3-COOH

33
Q

Carboxyl group reacts:

a) acidic
b) basic
c) electrophilic
d) nucleophilic

A

a) acidic
c) electrophilic
d) nucleophilic

34
Q 
By the oxidation of 
CH3-C=O
          I
         H
following compound is formed:

a) ethanoic acid
b) acetic acid
c) ethanol
d) dimethylketone

A

a) ethanoic acid

b) acetic acid

35
Q

Functional derivatives of carboxylic acids are:

a) anhydrides
b) hydroxyacids
c) ketoacids
d) amides

A

a) anhydrides

d) amides

Chemistry and Biology (11 decks)

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