Free Fundamental Principles of Organic Chemistry MCQs with Answers

• A. 1
• B. 2
• C. 3
• D. 6

Explanation: in C-C triple bond 3 pairs of electrons are shared between the 2 C atoms to fullfill the valency hence the option 6 is correct.

• A. Sp³
• B. Sp²
• C. Sp
• D. dsp³

Explanation: Hybridization is the concept of mixing atomic orbitals to form new hybrid orbitals that are optimized for bonding.

• A. Thiophene
• B. Anthracene
• C. Furan
• D. Pyrrol

Explanation: Anthracene, on the other hand, is a polycyclic aromatic hydrocarbon consisting of three fused benzene rings.

• A. Two sigma bonds
• B. One sigma, One pi bond
• C. One sigma and two pi bond
• D. Two pi bonds

Explanation: As the first bond between any two atoms is always a sigma bond and the second and so on are pi bonds formed by the parallel overlap of…

• A. Sp
• B. Sp²
• C. Sp³
• D. S-sp³

Explanation: S-SP3 hybridization is not a commonly recognized hybridization state. It is possible that it refers to a hybridization state that is a…

• A. Sp³
• B. Sp²
• C. Sp
• D. S-sp²

Explanation: In a primary amine, such as CH3NH2, the nitrogen atom forms three sigma bonds with three hydrogen atoms and one sigma bond with a carbon…

• A. Structural isomer
• B. Functional group isomer
• C. Position isomer
• D. Octane number

Explanation: Position isomers are molecules with the same molecular formula but different positions of functional groups or substituents.

• A. Alcohol
• B. Aldehyde
• C. Ester
• D. Ether

Explanation: carbonyl functional group is in the group ketone and aldehyde

• A. -OH
• B. -COOH
• C. -NH2
• D. -CHO

Explanation: The functional group of carboxylic acid is -COOH

• A. Carbon
• B. Nitrogen
• C. Hydrogen
• D. Sulfur

Explanation: The compounds in which the ring consists of atoms of more than one kind arecalled heterocyclic compounds or heterocycles.

• A. 1
• B. 2
• C. 3
• D. 4

Explanation: Two optically active stereoisomers are possible for butane-2,3-diol. This is because there are two chiral centers in the molecule.

• A. 4
• B. 5
• C. 6
• D. 7

Explanation: C6H14 is a saturated hydrocarbon of the alkane family, with the molecular formula CnH2n+2, where n = 6.

• A. Configurational isomers
• B. Conformational isomers
• C. Metamerism
• D. Geometrical isomers

Explanation: In summary, the stereo isomers which can be interconverted by rotation of a single bond are called conformational isomers

• A. Epimers
• B. Conformers
• C. Diastereomers
• D. None of these

Explanation: Diastereomers Diastereomers are the stereoisomers that are non identical,do not have mirror images,and hence are non-superimposable on…

• A. Cis
• B. Trans
• C. Eclipsed
• D. Staggered

Explanation: The isomer in which similar atoms are present on the same side of the double bond is snown as cis isomer.

• A. 2
• B. 5
• C. 3
• D. 4

Explanation: Correct Answer: A) 2 There are two primary types off isomerism,which can further be categorized into different types.These primary types…

• A. Stereoisomerism
• B. Metamerism
• C. Positional isomerism
• D. Tautomerism

Explanation: Tautomerism Acetaldehyde and ethanol shows tautomerism.This type of isomerism arises due to shifting of proton from one atom to other in…

• A. Diastereomers
• B. Enantiomers
• C. Geometric isomers
• D. Constitutional isomers

Explanation: Cis and trans isomers are types of geometric isomers,where the functional group is placed differently with regards to the double bond.In…

• A. CH3CH2CH2OH
• B. CH3CH(OH)CH3
• C. CH3CH2CH2CHO
• D. none of the above

Explanation: 1-butanol CH3CH2CH2CH2-OH has 4 C atoms. Whereas CH3CH2CH2-OH and CH3CH(OH)CH3 have 3 C atoms only.

• A. 5
• B. 6
• C. 7
• D. 8

Explanation: 8 structural isomers are possible for the given compound. Reference:google