Unit 13: Organic Chemistry - Hydrocarbon and Aromatic Hydrocarbon — Online MCQ Test
CHEMISTRY · CLASS 11 INTERMEDIATE 1 YEAR · Telangana State Board
Practice Unit 13: Organic Chemistry - Hydrocarbon and Aromatic Hydrocarbon with a free chapter-wise online MCQ test.
This chapter covers: The final chapter covers organic compound classification IUPAC nomenclature structural isomerism purification methods and fundamental reaction mechanisms. Students study preparatio....
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Unit 13: Organic Chemistry - Hydrocarbon and Aromatic Hydrocarbon — Important Questions & Answers
Which of the following is the correct IUPAC name for CH3-CH2-CH3?
- A. Propane
- B. Propene
- C. Propyne
- D. Methylethane
Answer: A. Propane
CH3-CH2-CH3 is a straight-chain alkane with three carbon atoms, so its IUPAC name is propane.
CH3-CH2-CH3 is a straight-chain alkane with three carbon atoms, so its IUPAC name is propane.
The general formula of alkenes is:
- A. CnH2n+2
- B. CnH2n
- C. CnH2n-2
- D. CnHn
Answer: B. CnH2n
Alkenes contain one carbon-carbon double bond, and for open-chain compounds their general formula is CnH2n.
Alkenes contain one carbon-carbon double bond, and for open-chain compounds their general formula is CnH2n.
How many structural isomers are possible for C4H10?
- A. 1
- B. 2
- C. 3
- D. 4
Answer: B. 2
C4H10 has two structural isomers: n-butane and isobutane (2-methylpropane).
C4H10 has two structural isomers: n-butane and isobutane (2-methylpropane).
Which of the following compounds will have the highest number of structural isomers among the options?
- A. C3H8
- B. C4H10
- C. C5H12
- D. C2H6
Answer: C. C5H12
Pentane (C5H12) has three structural isomers, which is more than the other options listed.
Pentane (C5H12) has three structural isomers, which is more than the other options listed.
A hydrocarbon gives a sooty flame and undergoes electrophilic substitution with chlorine in the presence of FeCl3. The compound is most likely:
- A. Ethane
- B. Ethene
- C. Benzene
- D. Propane
Answer: C. Benzene
Benzene burns with a sooty flame due to its high carbon content and undergoes substitution with chlorine in the presence of Lewis acid catalysts like FeCl3.
Benzene burns with a sooty flame due to its high carbon content and undergoes substitution with chlorine in the presence of Lewis acid catalysts like FeCl3.