Chemistry

Organic Chemistry Fundamentals

287 Questions

Organic chemistry fundamentals cover the structure, properties, and reactions of carbon containing compounds. The questions explore functional groups, isomerism, homologous series, and basic reaction mechanisms. This forms the basis of general chemistry across multiple examination formats.

Functional groupsIsomerism typesHomologous seriesCycloalkanesOrganic monomers

Organic Chemistry Fundamentals Questions

Multiple choice

Which of the following statements is/are true? A. 1-chloro-2, 3-pentadiene has no chiral carbon atoms, yet it is a chiral molecule. B. A newly discovered compound is thought to be chiral but shows no rotation in a specific solvent. C. When a chiral molecule reacts to give a chiral molecule the product is always racemic.

  1. Only A

  2. Only B

  3. Only C

  4. Only A and C

  5. Only B and C
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This statement is true because the molecule as whole is chiral, since this molecule and its mirror image are non-superimposable.

Multiple choice

What is valency of carbon?

  1. 8

  2. 6

  3. 4

  4. 3
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Carbon has 4 valence electrons in its outer shell, allowing it to form four covalent bonds. This valency of 4 is fundamental to organic chemistry.

Multiple choice

Alkenes and alkynes are _________.

  1. saturated aliphatic hydrocarbons

  2. unsaturated aliphatic hydrocarbons

  3. unsaturated aromatic hydrocarbons

  4. cyclic hydrocarbons
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Unsaturated aliphatic hydrocarbons are those hydrocarbons in which cabon - carbon double bond and triple bonds are present . 

Multiple choice

Which of the following statements is/are correct?

A. Isomers are same compounds with different molecular formula. R. Isomers have different arrangement of their constituent atoms in the space.

  1. Both A and R are true and R is the correct explanation of A.

  2. Both A and R are true but R is not the correct explanation of A.

  3. A is true but R is false.

  4. A is false but R is true.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Isomers are different compounds with same molecular formula. Isomers have different arrangement of their constituent atoms in the space.

Multiple choice

The pair of compounds representing isomers is

  1. methane and ethane.

  2. propane and butane.

  3. butene-1 and butene-2.

  4. propene and butene.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Isomers are compounds with the same molecular formula but different structural arrangements. Butene-1 and butene-2 are structural isomers due to the position of the double bond.

Multiple choice

An example of cyclic carbon compound is

  1. cyclobutane.

  2. cyclopropane.

  3. cyclopentane.

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cyclobutane, cyclopropane, and cyclopentane are all examples of cyclic carbon compounds (cycloalkanes).