Classification of Organic Compounds Flashcards by Khristine Tapado

Organic compounds are broadly classified as
a) Open chain compounds and acyclic compounds
b) Open chain compounds and linear chain compounds
c) Cyclic compounds and alicyclic compounds
d) alicyclic compounds and acyclic compounds

d) alicyclic compounds and acyclic compounds

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Aliphatic compound is the other name for
a) Acyclic compounds
b) Alicyclic compounds
c) Ring compounds
d) Closed chain compounds

a) Acyclic compounds

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Which among the following is not an example of Acyclic compound
a) Acetaldehyde
b) Ethane
c) Cyclopropane
d) Isobutane

c) Cyclopropane

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Which among the following is not an example of alicyclic
compound
a) Cyclohexane
b) Cyclohexene
c) Tetrahydrofuran
d) Acetic acid

d) Acetic acid

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Which among the following is not a class of organic
compound
a) Carbonyl compound
b) Nitro compound
c) Amides
d) Electro compounds

d) Electro compounds

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Which among the following is not an aromatic
compound(in specific)
a) Naphthalene
b) Aniline
c) Pyridine
d) Tropolone

c) Pyridine

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Identify the odd one among the following
a) Indene
b) Anthracene
c) o,m,p-xylene
d) Azulene

d) Azulene

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Organic compounds can be classified even based upon the function groups. Identify the one which is not a functional group
a) Isocyanide
b) Isocyano
c) Carboxyl
d) Carbonyl

a functional group

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Find the odd one among the following:
a) Alicyclic compounds
b) Heterogeneous compounds
c) Branched chain compounds
d) Aromatic compounds

c) Branched chain compounds

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Resonance forms are in equilibrium with each other.
State true or false
a) True
b) False

b) False

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Identify the false statement regarding resonance
a) As the number of charges increases, the resonance
forms gets more significant
b) Zero charge of resonance is the most significant one
c) Atoms with full octet resonance form are more stable
when compared with the one with unfilled octet
d) Resonance is unstable in case of unfilled octet of
nitrogen atom

a) As the number of charges increases, the resonance
forms gets more significant

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Which among these is not associated with aliphatic
compounds
a) They contain (4n+2)pi electrons
b) Contain straight chain compounds
c) Contain branched chain compounds
d) Has appropriate number of H-atoms and functional

a) They contain (4n+2)pi electrons

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Identify the correct sequence according to
electronegativity
a) F> NH2> CH3>OHb) NH2> F>CH3> OHc) NH2>OH> CH3>Fd) F> OH>NH2>CH3`

d) F> OH>NH2>CH3

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Identify the correct sequence with respect to Inductive
effects
a) CF3> CH2F> CHF2> CF3
b) CF3> CHF2> CH2F> CH3
c) CH3> CH2F> CHF2> CF3
d) CH3> CHF2> CH2Fv CF3

b) CF3> CHF2> CH2F> CH3

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Select the correct statement regarding the aromatic
nitrogen molecule
a) It is not hybridized
b) It is sp hybridized
c) It is sp2 hybridized
d) It is sp3 hybridized

c) It is sp2 hybridized

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Stability sequence: primary carbocation> secondary
carbocation > tertiary carbocation.
Is this sequence correct?
a) Yes
b) No

b) No

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Identify the incorrect statement regarding aromaticity
a) It is the extra stability possessed by a molecule
b) p-orbitals must be planar and overlap
c) Cyclic delocalization takes place
d) It does not follow Huckel’s rule

d) It does not follow Huckel’s rule

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Can a linear molecule have aromaticity?
a) Yes
b) No

a) Yes

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Identify the one which does not come under the organic addition reaction
a) Hydration
b) Dehydration
c) Halogenation
d) Hydrohalogenation

b) Dehydration

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Select the incorrect statement:
a) A resonance may sometimes cause sp3 atoms to
become sp2 hybridized
b) Delocalizing one lone pair causes aromaticity
c) One lone pair will be counted as two pi electrons
according to Huckel’s equation
d) Two sigma bonds make up a double bond

d) Two sigma bonds make up a double bond

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Aromatic rings do not have resonance structures. State true or false
a) False
b) True

a) False

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Choose the correct one which will react faster in the
SN2 nucleophilic substitution reaction
a) CH2-CH=CH2=Br
b) CH2 = CH- CH2 – Br
c) CH2 = CH- CH2 = Br
d) CH= CH2 – CH2 – Br

b) CH2 = CH- CH2 – Br

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Identify the one which on reaction with carboxylic acid at high temperature gives Ester
a) Ketone
b) Alcohol
c) Aldehyde
d) Sugars

b) Alcohol

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Alcohol on refluxing with Cr2O7 gives:
a) Ester
b) Aldehyde
c) Sugar
d) Carboxylic acid

d) Carboxylic acid

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3. What will be the reactivity of chlorobenzene in an electrophilic substitution reaction with benzene? a) Reacts very slowly than benzene b) Reacts in the same way as benzene c) Reacts faster than benzene d) Does not react with benzene

a) Reacts very slowly than benzene

8. Primary alcohols undergo what reaction to form alkenes? a) Elimination b) Oxidation c) Reduction d) Hydrolysis

a) Elimination

5. Alkene under high temperature and high-pressure forms a) Alcohol b) Polyalkyne c) Polyalkane d) Polyalkene

c) Polyalkane

7. Select the correct statement regarding carboxylic acids a) They form acyl chlorides on reaction with PCl5 b) Aldehydes in the presence of H+/ Cr2O7 forms carboxylic acids c) They combine with alcohols to form esters d) Upon polymerization, they form polymers

d) Upon polymerization, they form polymers

10. Primary amides get converted into primary amines by: a) Addition b) Oxidation c) Reduction d) Acylation

b) Oxidation

1. Identify the one which does not come under the chemical methods of quantitative analysis a) Gravimetric b) Titrimetric c) Volumetric d) Magnetic suceptibility

d) Magnetic suceptibility

9. Carbonyl compounds especially ketones undergo reduction to form a) Primary alcohols b) Secondary alcohols c) Alkanes d) Alkenes

b) Secondary alcohols

2. Quantitative analysis is one which is used for separating out the specific constituents from a mixture. This statement is: a) True b) False

b) False

3. Select the incorrect statement regarding analytical balance a) It is the fundamental kit in quantitative analysis b) It measures samples very accurately c) It could measure the difference in mass upto 0.1 mg d) It is not a sensitive instrument

d) It is not a sensitive instrument

6. Identify the test which is not a part of qualitative analysis: a) Litmus test b) Kastle-Meyer test c) Iodine test d) Flame test

a) Litmus test

5. Select the inappropriate statement regarding quantitative analysis a) It helps in determining the outcome of the product b) It helps in determining the impurities in the sample c) It fails to indicate the presence of lead in some compound d) It could identify the amounts of dosage present in the drug

c) It fails to indicate the presence of lead in some compound

4. Which among the following is not a physical method: a) X-ray fluorescence spectroscopy b) Atomic emission spectroscopy c) Inert gas fusion d) Trace element analysis

c) Inert gas fusion

10. Identify the incorrect statement regarding the reagent 6M NH3 a) It increases hydroxide and NH3 concentration b) It decreases H+ concentration c) It is capable of precipitating insoluble hydroxides d) It is capable of forming hydro complexes

d) It is capable of forming hydro complexes

8. Identify the reagent which is not commonly used in qualitative analysis a) 6M NaOH b) 6M HCl c) 6M HNO3 d) 6M NH4

d) 6M NH4

9. Select the correct statement about the reagent 6M HNO3 a) It forms hydroxo complexes b) It destroys hydroxo and ammonia complexes c) It forms NH3 complexes d) It decreases the H+ ion concentration

b) It destroys hydroxo and ammonia complexes

7. Covalent molecules can be identified using quantitative methods. State true or false a) False b) True

a) False

1. Select the incorrect statement regarding alkanes a) It is otherwise known as Paraffin b) It is an acyclic saturated hydrocarbon c) In alkanes, C-C bonds are single d) Alkanes have the general formula CnH2n

d) Alkanes have the general formula CnH2n

2. Identify the simplest alkane a) Methane b) Methene c) Ethane d) Ethene

a) Methane

5. Which among the following is not an alkane isomer with 6 carbon atoms a) Hexane b) 2,3-dimethylbutane c) 2,2-dimethylbutane d) Neopentane

d) Neopentane

3. Select the minimum number of carbon atoms, a molecule must possess so as to be regarded as a higher alkane a) 15 b) 16 c) 17 d) 18

c) 17

4. Identify the incorrect statement a) Alkanes with repeated –CH2- units constitute a homologus series b) They are very reactive c) They have very less biological activity d) Petroleum and natural gas are the main sources of alkanes

b) They are very reactive

6. The other name for branched chain alkanes is a) Paraffins b) Isoparaffins c) Neoparaffins d) Naphthenes

b) Isoparaffins

7. Select the incorrect statement regarding the boiling points of alkanes a) Boiling point increases with stronger Vander Waal’s forces b) Surface area is the only factor which determines the boiling point of alkane c) Boiling point of straight chain alkanes is greater than that of branched chain alkanes d) The boiling point of cycloalkanes is always higher than that of linear alkanes

b) Surface area is the only factor which determines the boiling point of alkane

8. Choose the correct statement : a) Alkanes have poor conductivity b) They form hydrogen bonds c) They have good solubility in non polar solvents than polar solvents d) Alkanes have less density than that of water

b) They form hydrogen bonds

9. Liquified petroleum gas is mainly composed of : a) Methane and ethane b) Ethane and propane c) Propane and butane d) Butane and hexane

c) Propane and butane

10. An alkane with 6 carbon atoms will have how many hydrogen atoms? a) 11 b) 12 c) 13 d) 14

d) 14

1. In Alkenes the Carbon atoms are connected to each other by a a) Single bond b) Double bond c) Triple bond d) Not connected

b) Double bond

2. Which among these is not a structural isomer of the compound C4H8 a) But-1-ene b) But-2-ene c) But-3-ene d) 2-methylpropene

c) But-3-ene

3. Select the incorrect statement regarding alkenes a) In alkenes, the carbons are connected by pi bonds b) Alkenes have almost same physical properties as that of the alkanes c) Alkenes are less reactive than alkanes d) Alkenes undergo polymerization reaction

c) Alkenes are less reactive than alkanes

4. Identify the addition reaction which is not undergone by the alkenes a) Mercuration b) Oxymercuration c) Hydroboration d) Halogenation

a) Mercuration

7. Which among the following is not colourless: a) Methene b) Ethene c) Propene d) Butene

b) Ethene

5. Identify the incorrect statement regarding the synthesis of alkenes a) Cracking of a hydrocarbon yields alkenes b) The reactions are exothermic c) Zeolite catalyst helps in the synthesis of alkenes d) The synthesis of alkenes is otherwise known as reforming

b) The reactions are exothermic

6. Identify the one which shows E-Z mechanism a) 3-methylpent-2-ene b) 2-methylpent-2-ene c) Methyl-3-pent-2-ene d) 2,3-methylpentene

a) 3-methylpent-2-ene

9. 4-chlorobut-1-ene is the name of which among the following alkenes a) CH2Cl-CH2=CH-CH2 b) CH2Cl-CH2-CH-CH2 c) CH2Cl=CH2-CH=CH2 d) CH2Cl-CH2-CH=CH2

d) CH2Cl-CH2-CH=CH2

8. Which among the following alkenes is used in the manufacturing of plastics a) Butadiene b) 1,2-butadiene c) 1,3-butadiene d) 2-butadiene

c) 1,3-butadiene

10. Ethylene on reaction with bromine forms which among the following product a) BrH2C-CH2Br b) BrH2C=CH2Br c) Br2HC=CHBr_2 d) Br2HC-CHBr_2

a) BrH2C-CH2Br

1. Alkynes are more reactive than alkenes’ State true or false a) False b) True

a) False

4. The major alkyne, acetylene compound is produced by which among the following application on natural gas a) Hydrogenation b) Partial oxidation c) Cracking d) Hydrohalogenation

b) Partial oxidation

2. Select the incorrect statement a) The addition reactions occur more frequently in the alkenes than the alkynes b) The pi system of the alkynes gets weakened when they lose the pi atoms c) Alkynes readily undergo oligomerization d) Alkynes do not undergo polymerization

d) Alkynes do not undergo polymerization

3. Select the incorrect statement regarding terminal alkynes a) Methylacetylene is an example of terminal alkynes b) Terminal alkynes are more acidic when compared with alkenes c) Terminal alkynes are not as acidic as alkanes d) These have a replaceable acidic hydrogen atom

c) Terminal alkynes are not as acidic as alkanes

5. Majority of the alkynes are not prepared from/ by: a) Condensation b) Acetylene c) Dehydrohalogenation d) Hydrogenation

d) Hydrogenation

6. Alkynes cannot be prepared from a) Ketones b) Alcohols c) Aldehydes d) Other alkynes

b) Alcohols

7. The transformation into carboxylic acids of the alkynes takes place with the help of which among the following reagents? a) Potassium chlorate b) Potassium permanganate c) Potassium dichromate d) Potassium chloride

b) Potassium permanganate

8. Identify the incorrect statement: a) Alkynes exists in gaseous state b) They are soluble in water c) They are soluble in organic solvents d) Alkynes have a very good boiling point

b) They are soluble in water

9. Which among the following alkynes is used as a rocket fuel? a) Ethyne b) Propyne c) But-1-yne d) Pent-1-yne

b) Propyne

10. Which among the following product is formed when ethyne undergoes hydrogenation? a) Formaldehyde b) Formic acid c) Acetaldehyde d) Acetic acid

c) Acetaldehyde

1. Cycloalkanes are associated with the general formula a) CnH2n+2 b) CnH2(n+2) c) CnH2n+1-r d) CnH2(n+1-r)

d) CnH2(n+1-r)

2. Cycloalkanes have the same melting and boiling points as their corresponding alkanes. State true or false a) True b) False

) False

3. Identify the incorrect statement regarding cycloalkanes a) These have sp3 hybridized carbons b) These have tetrahedral bond angles c) Stability of the cycloalkanes varies directly with their respective size d) These undergo nucleophilic substitution reactions

b) These have tetrahedral bond angles

4. Identify the compound with the highest ring strain a) Cyclomethane b) Cyclopropane c) Cyclobutane d) Cyclopentane

b) Cyclopropane

5. Which among the following compounds explodes on contact with oxygen a) Cyclopropane b) Cyclobutane c) Cyclopentane d) Cyclohexane

a) Cyclopropane

6. Identify the incorrect statement regarding cyclobutane a) The carbon atoms in the cyclobutane are non-coplanar b) These exist in nature as colourless gas c) Cyclobutane is a commercially important compound d) These compounds often show butterfly conformation

c) Cyclobutane is a commercially important compound

7. Identify the alicyclic hydrocarbon which is highly flammable a) Cycloheptane b) Cyclopentane c) Cyclopropane d) Cyclooctane

b) Cyclopentane

9. Identify the incorrect statement regarding cycloalkenes a) The bonds in them are fewer compared to those in alkenes b) They occur in gaseous form in nature c) These undergo polymerization d) The conjugated double bonds in them increase their stability

b) They occur in gaseous form in nature

8. Identify the incorrect statement regarding cyclohexane: a) It is non-polar b) It serves as an organic solvent c) It a hydrophilic hydrocarbon d) It is commercially used for variety of applications

c) It a hydrophilic hydrocarbon

1. Identify the incorrect statement regarding alkadiene a) These are acyclic acids b) These are unsaturated hydrocarbons c) These compounds have only one C=C bonds d) These compounds have the general formula CnH2n-2

c) These compounds have only one C=C bonds

10. Cycloalkene exhibits aromatic character. State true or false a) True b) False

b) False

2. Alkadienes are classified into how many types? a) 1 b) 2 c) 3 d) 4

c) 3

3. Identify the incorrect statement regarding conjugated double bonds in alkadiene: a) 1,3 alkadienes have conjugated double bond b) Compounds with a double bond exhibit this type of bond c) 1,3 pentadiene is an example for this bond d) The conjugated dienes have properties similar to that of alkenes

b) Compounds with a double bond exhibit this type of bond

4. Identify the one which is the perfect example for Isolated double bond: a) 1,4 pentadiene b) 1,2 pentadiene c) 1,3 pentadiene d) 1,5 butadiene

a) 1,4 pentadiene

5. Identify the incorrect statement regarding alkadienes a) Dienes show cis-trans isomerism b) Conjugated dienes have better stability compared to other dienes c) Dienophile supports alkadienes d) Alkadienes also undergo hydrobromination

c) Dienophile supports alkadienes

6. Conjugated diene reacts with which among the following to form a cyclohexene a) Phenol b) Dienophile c) Hexane d) Tribromo phenol

b) Dienophile

7. Which among the following dienes undergo addition with the help of radical-chain mechanism? a) Cumulated dienes b) Isolated dienes c) Simple dienes d) Conjugated dienes

d) Conjugated dienes

9. A molecule in which more than one single bond separates two double bonds are called as: a) Coordinate bond b) Isolated double bond c) Cumulative double bond d) Conjugated double bond

b) Isolated double bond

8. Identify the statement which is related to Diels-Alder reaction a) It is very stereospecific b) Molecular distortion takes place c) Cyclic dienes react very slow than the linear chain dienes d) Addition of maleic anhydride to cyclopentadiene causes diene and dienophile to produce different products

c) Cyclic dienes react very slow than the linear chain dienes

10. Isolated dienes are similar in property to a) Monoolefins b) Diolefins c) Triolefins d) Tetraolefins

a) Monoolefins

1. Identify the correct statement which is related to aromatic hydrocarbon a) It has only sigma bonds b) It has only pi bonds c) It has a sigma and two pi bonds d) It has a sigma and delocalized pi bond

d) It has a sigma and delocalized pi bond

2. Select the incorrect option: a) The aromatic hydrocarbon has a pleasant aroma (smell) b) Some of the aromatic compounds are ring-shaped c) Aromatic hydrocarbon can be either mono or polycyclic d) Benzene is the simplest hydrocarbon

b) Some of the aromatic compounds are ring-shaped

3. Which among the following is not a property of aromatic hydrocarbon: a) These compounds have very good aromaticity b) These compounds have excellent stability c) These compounds do not undergo nucleophilic substitutions but they undergo electrophilic substitutions d) There exists a strong ratio between carbon and hyrogen

c) These compounds do not undergo nucleophilic substitutions but they undergo electrophilic substitutions

4. Arenes does not undergo: a) Dehydrogenation b) Coupling reaction c) Halogenation d) Cyclo additions

a) Dehydrogenation

6. Which among these is the simplest example for polycyclic arenes? a) Benzacephenanthrylene b) Naphthalene c) Pyrene d) Dibenz-anthracene

b) Naphthalene

5. Which among these is not a representative arene compound? a) Durene b) Picric chloride c) Aspirin d) Mesitylene

b) Picric chloride

7. Arenes are polar. State true or false a) True b) False

b) False

9. The main sources of these arenes are: a) Petroleum b) Biogas and petroleum c) Petroleum and coal tar d) Natural gas

c) Petroleum and coal tar

10. Benzene has a stronger Vander-Waal’s force than Methylbenzene. State true or false a) False b) True

a) False

8. Arenes are: a) volatile b) Water soluble c) Non-carcinogenic d) Mostly gases

a) volatile

Classification of Organic Compounds Flashcards

(100 cards)