Free MCQs & Online Quiz Practice for Exams

Q: Select the o/p-directing but ring-deactivating group of the following? (ETEA 2016)

A) -CH₃

B) -Cl

C) -NO₂

D) -OH

Q: Select the meta-directing group? (ETEA 2016)

A) -OH

B) -NR₂

C) -CN

D) -OR

Q: The carbon–carbon triple bond length in acetylene is: (ETEA 2017)

A) 1.09 Å

B) 1.119 Å

C) 1.39 Å

D) 1.19 Å

Q: Choose the least stable of the following butenes: (ETEA 2017)

A) 1-Butene

B) Cis-2-Butene

C) Trans-2-butene

D) Iso-butylene

Q: Benzene gives more stable product when it undergoes: (ETEA 2017)

A) Nucleophilic addition

B) Oxidation

C) Electrophilic substitution

D) Electrophilic addition

Q: Kolbe's electrolysis of sodium butyrate (C₃H₇COO⁻) gives: (ETEA 2017)

A) C₆H₁₂

B) C₆H₁₄

C) C₅H₁₀

D) C₅H₁₂

Q: AlBr₃ which is used in the alkylation of benzene possesses the properties of: (ETEA 2017)

A) A catalyst

B) A Lewis acid

C) An electron-deficient specie

D) All of the above

Q: Alkene + O₃ → ozonide → Propanone + Propanal. The IUPAC name of the alkene is: (ETEA 2017)

A) Hex-2-ene

B) Hex-3-ene

C) 2-methylpent-1-ene

D) 2-methylpent-2-ene

Q: Silver acetylide in dry condition is highly explosive; it reacts with nitric acid to form: (ETEA 2017)

A) Silver oxide, carbon dioxide and water

B) Silver nitrate and ethyne

C) Silver nitrate and ethane

D) Silver nitrate and carbon dioxide

Q: Choose the correct statement about cycloalkanes: (ETEA 2017)

A) Cyclopropane and cyclobutane are liquids at RT

B) Cycloalkanes are insoluble in ethanol and ether but soluble in water

C) Their melting and boiling points show a gradual increase with increase in number of carbons

D) Both (b) & (c) correct

Q: What types of hybridization is/are present in Hex-4-ene-1-yne? (ETEA 2017)

A) sp²

B) sp

C) sp and sp²

D) sp, sp², sp³

Q: Which group when attached to benzene will increase its reactivity? (ETEA 2017)

A) -NHR

B) -NH₂

C) -C≡N

D) -COR

Q: Cyclic alkanes with greater angle strain are always: (ETEA 2018)

A) More stable

B) Less energetic

C) More reactive

D) Obey the general formula of normal alkane

Q: Alkene that do not follow cis–trans isomerism is: (ETEA 2018)

A) But-2-ene

B) 1-chloropropene

C) 1,1-dichloropropene

D) 1,2-dichloroethane

Q: Compound in which addition takes place through Markovnikov's rule is: (ETEA 2018)

A) CH₃–CH=CH–CH₃

B) CH₃–C(CH₃)=CH–CH₃

C) C₂H₅–CH=CH–CH₃

D) CH₃–CH=CH–C₈H₁₇

Q: The Friedel–Crafts catalyst AlCl₃ used in the substitution reactions of benzene is a good: (ETEA 2018)

A) Electrophile

B) Lewis acid

C) Electron-deficient specie

D) Bear all properties

Q: The most reactive compound out of the following is: (ETEA 2018)

A) Ortho-hydroxy toluene

B) Ortho-chloro ethyl benzene

C) Phenol

D) Para-ethyl benzoic acid

Q: Chemical reactions associated with hydrocarbons is/are: (ETEA 2018)

A) Electrophilic addition

B) Electrophilic substitution

C) Free radical substitution

D) All are possible

Q: A gas decolorizes alkaline KMnO₄ solution but does not give any precipitate with ammoniacal AgNO₃: (ETEA 2019)

A) Methane

B) Ethylene

C) Ethane

D) None

Q: Epoxide obtained from isobutylene is further hydrolyzed in the presence of acid. The final product is: (ETEA 2019)

A) 2,3-Butanediol

B) 1,2-Butanediol

C) 2-Methyl-1,2-propanediol

D) All of them