Organic Chemistry - Hydrocarbons

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Q1. Which of the following is the simplest alkene? (2021)

Solution:

Ethylene (C2H4) is the simplest alkene, containing a double bond between two carbon atoms.

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Q2. Which of the following compounds has a triple bond? (2022)

Solution:

Acetylene (C2H2) contains a triple bond between the two carbon atoms.

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Q3. Which of the following compounds is a cyclic alkane? (2022)

Solution:

Cyclopropane is a cyclic alkane with three carbon atoms in a ring.

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Q4. Which of the following is a characteristic of aromatic hydrocarbons? (2023)

Solution:

Aromatic hydrocarbons are known for their pleasant smell and contain a stable ring structure.

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Q5. What is the main product when ethene reacts with water in the presence of an acid? (2023)

Solution:

The reaction of ethene with water in the presence of an acid yields ethanol.

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Q6. What type of bond is present in alkynes? (2022)

Solution:

Alkynes contain at least one triple bond between carbon atoms.

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Q7. What is the molecular formula of the simplest alkyne? (2022)

Solution:

The simplest alkyne is ethyne (acetylene) with the molecular formula C2H2.

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Q8. What is the molecular formula of cyclohexane? (2022)

Solution:

Cyclohexane is a cyclic alkane with the formula C6H12.

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Q9. Which of the following is a cyclic hydrocarbon? (2019)

Solution:

Cyclohexane is a cyclic hydrocarbon with a ring structure.

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Q10. Which of the following compounds is a branched alkane? (2022)

Solution:

C5H12 can exist as both straight-chain (pentane) and branched (isopentane) forms.