Free Fundamental Principles of Organic Chemistry MCQs with Answers

• A. Saturated
• B. Unsaturated
• C. Alkenes
• D. Alkynes

Explanation: Organic compounds in which tetravalency of carbon atom is fully satisfied are called saturated compounds.

• A. NO2
• B. NH3
• C. NO3
• D. N+H4

Explanation: A nucleophile is a species that donates an electron pair to form a new covalent bond with an electrophile.

• A. Option A
• B. Optiion B
• C. Option C
• D. Option D

Explanation: This is the right answer because it follows the conditions of geometric isomerism:1. A double bond between two carbon atoms.2.

• A. Thermal cracking
• B. Catalytic cracking
• C. Steam cracking
• D. Reforming

Explanation: In catalytic cracking higher hydrocarbons can be cracked at lower tem perature (500°C) and lower pressure (2 atm), in the presence of a…

• A. Naphthalene
• B. Aniline
• C. Pyridine
• D. Tropolone

Explanation: Tropoline is also a heterocyclic compound with a seven-membered ring containing one nitrogen atom, but it is not considered aromatic…

• A. Alicyclic compounds
• B. Heterocyclic compounds
• C. Branched chain compounds
• D. Aromatic compounds

Explanation: Alicyclic compounds, heterocyclic compounds and aromatic compounds are closed chain compounds or cyclic compounds.

• A. Indene
• B. Anthracene
• C. o,m,p-xylene
• D. Azulene

Explanation: o,m,p Xylene, on the other hand, is not aromatic in nature. It is a mixture of three isomers of xylene, each containing a benzene ring…

• A. Isocyanide
• B. Isocyano
• C. Carboxyl
• D. Carbonyl

Explanation: Isocyanide is a compound and it is not a functional group

• A. Carbonyl compound
• B. Nitro compound
• C. Amides
• D. Electro compounds

Explanation: Electro compounds: Electro compounds is not a defined class of organic 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 groups

Explanation: Aliphatic hydrocarbons can either be straught chain or branched chain. They have appropriated number of hydrogen atoms and functional…

• A. Oxygen
• B. Sulfur
• C. Nitrogen
• D. Silicone

Explanation: Silicon is not commonly found in organic compounds because it is not a biologically essential element.

• A. Natural gas
• B. Fermentation
• C. Sea water
• D. Atmosphere

Explanation: Natural gas is a major source of organic compounds because it is primarily composed of hydrocarbons, which are organic compounds made up…

• A. greater than the C-C bond length in ethane.
• B. shorter than the C-C bond length in ethylene
• C. Same as that of C-C bond length in ethylene
• D. intermediate between C-C bond length in ethane and C-C bond length in ethylene.

Explanation: Benzene is a planar cyclic compound consisting of six carbon atoms and six hydrogen atoms.

• A. sp³ hybridization
• B. sp² hybridization
• C. ap hybridization
• D. Cannot predicted

Explanation: As explained above pyridine is sp2 hybridized. It forms three sigma bonds with the carbon atoms and hydrogen atom in the ring and has a…

• A. 2 bonds
• B. 3 bonds
• C. 4 bonds
• D. 5 bonds

Explanation: C forms 4 bonds in the most stable compounds.

• A. 4 other atoms
• B. 2 other atoms
• C. 3 other atoms
• D. 5 other atoms

Explanation: When a C atom is sp2 hybridized it is bonded to 3 other atoms.

• A. 180°
• B. 120°
• C. 109.5°
• D. 115.5°

Explanation: The explanation for this question will be added soon!

• A. triple, double, single
• B. single, double, triple
• C. triple, single, double
• D. single, triple, double

Explanation: The correct order of increasing carbon-carbon bond length is triple bond < double bond < single bond, as mentioned in option a.

• A. CH2=CH2
• B. CH3CH3
• C. HC≡CH
• D. Benzene

Explanation: Ethyne contains a carbon-carbon triple bond, which has a bond length of around 1.20 Å.

• A. 0
• B. 1
• C. 2
• D. 3

Explanation: In sp hybridization as a result of hybridization two hybrid orbitals are produced which are partially filled.