Classification of Organic Compounds

• 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

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

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

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

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

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

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

• 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

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

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

• 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

• 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

• Identify the correct sequence according to electronegativity a) F> NH2> CH3>OH b) NH2> F>CH3> OH c) NH2>OH> CH3>F d) F> OH>NH2>CH3`

• 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

• 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

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

• 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

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

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

• 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

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

• 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

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

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