Free MCQs & Online Quiz Practice for Exams

Q: Which of the following compounds produce the lowest amount of heat on combustion? (ETEA 2019)

A) 1-Butene

B) Trans-2-Butene

C) Cis-2-Butene

D) Iso-butylene

Q: Hydration of hydrocarbon gives carbonyl compound; the general formula of that hydrocarbon is: (ETEA 2019)

A) CₙH₂ₙ₊₂

B) CₙH₂ₙ

C) CH₂ₙ·2

D) Both b and c

Q: The formation of but-2-ene always takes place through: (ETEA 2019)

A) sp² hybridization

B) sp³ hybridization

C) sp²–sp³ both

D) sp, sp³ both

Q: An olefin 'X' on ozonolysis gives CH₃CH₂COCH₃ and CH₃COCH₃. The IUPAC name of X is: (ETEA 2019)

A) 2-Butene

B) 2,3-Dimethyl-2-pentene

C) 2-Pentene

D) 1-Hexene

Q: Ozonolysis of 2-methyl-2-butene yields: (ETEA 2019)

A) Only aldehyde

B) Only ketone

C) Both aldehyde and ketone

D) Aldehyde and alcohol

Q: A metallic carbide on treatment with water gives out a colourless gas, which burns in air readily and gives a red precipitate with Cu₂Cl₂ and NH₄OH — identify the gas: (ETEA 2019)

A) CH₄

B) CH₂

C) C₂H₄

D) CH₅

Q: C₄H₁N gives the type of isomerism: (ETEA 2019)

A) Metamerism

B) Optical isomerism

C) Tautomerism

D) None

Q: On chlorination benzene forms a single monochlorobenzene without any isomer — it proves that: (ETEA 2019)

A) Benzene is aromatic

B) All C–C bond lengths in benzene are identical

C) All C–H bonds in benzene are identical

D) Benzene sometimes behaves as non-aromatic

Q: The number of isomers of pentane is: (ETEA 2019)

A) 2

B) 4

C) 5

D) 3

Q: General formula of cycloalkane is: (ETEA 2020)

A) CₙH₂ₙ₊?

B) CₙH₂ₙ

C) CₙH₂ₙ₋₁

D) CₙH₂ₙ₋₂

Q: Electrophile in sulphonation of benzene is: (ETEA 2020)

A) HSO₃

B) H₂SO₄

C) SO₃

D) HSOζ

Q: Dehydration of alcohol at 170°C in the presence of H₂SO₄ results in the formation of: (ETEA 2020)

A) Alkenes

B) Ethers

C) Alkoxide

D) Alkanes

Q: Acetophenone can be formed by which of the following reaction of benzene? (ETEA 2020)

A) Alkylation

B) Acylation

C) Halogenation

D) Nitration

Q: Select the organic compound which belongs to the Arene family: (ETEA 2020)

A) CH₂=CH₂

B) CH₃–O–CH₃

C) CH₃NH₂

D) C₆H₆

Q: The type of isomerism existing in a compound of molecular formula C₂H₆O is: (ETEA 2020)

A) Functional group

B) Position

C) Chain

D) Metamerism

Q: In alkanes, each carbon has hybridization: (ETEA 2020)

A) sp³

B) sp

C) sp²

D) dsp

Q: Which of the following hybrid orbitals has maximum 's' character? (ETEA 2020)

A) sp³-hybrid orbital

B) sp²-hybrid orbital

C) sp-hybrid orbital

D) dsp²-hybrid orbital

Q: When CH₃ is attached with the benzene ring, it makes the ring: (ETEA 2020)

A) Good electrophile

B) Good nucleophile

C) Resonance hybrid

D) Extraordinary hybrid

Q: Cycloalkanes are represented by general formula CₙH₂ₙ where: (ETEA 2020)

A) n > 3

B) n ≤ 3

C) n = 1,2,3,...

D) n ≥ 3

Q: A mixture of 50 g H₂ and 50 g He has a total pressure of 1.5 atm. What is the partial pressure of H₂? (ETEA 2005)

A) 1.0 atm

B) 2.0 atm

C) 1.5 atm

D) 3.0 atm