1. Main source of organic compounds is
A. Animal
B. Fossil
C. Coal
D. Plants
✅ The correct answer is option A.
Organic Chemistry MCQs
2. Octane number can be improved by
A. Isomerization
B. Adding (C2H5)4 Pb
C. Adding (CH3)4 Pb
D. All
✅ The correct answer is option D.
3. Hydrocarbons which burn with smoky flame are called
A. Aliphatic
B. Alicyclic
C. Aromatic
D. Aldehyde
✅ The correct answer is option C.
4. Octane number 2 2 4-trimethyl pentane is
A. 100
B. 90
C. 80
D. 70
✅ The correct answer is option A.
5. Propene can exhibit
A. cis-trans isomerism
B. geometric isomerism
C. both A & B
D. none of the above
✅ The correct answer is option D.
6. Geometric isomerism is usually found in
A. Alkanes
B. Alkenes
C. Alkynes
D. Esters
✅ The correct answer is option B.
7. Pentane and 2-methyl butane have the same
A. Boiling point
B. Melting point
C. Percentage composition
D. Structural formula
✅ The correct answer is option C.
8. Organic compounds that are essentially nonpolar and exhibit weak intermolecular forces have
A. Low melting points
B. Low vapour pressure
C. High boiling points
D. High electrical conductivity
✅ The correct answer is option A.
9. The first organic compound was synthesized in laboratory by
A. Wohler
B. Kolbe
C. Berzelius
D. Berthelot
✅ The correct answer is option A.
10. According to vital force theory
A. Organic compounds can be synthesized from inorganic compounds
B. organic compounds cannot be synthesized from inorganic compounds
C. organic compounds can be synthesized by animals
D. organic compounds can be synthesized by plants
✅ The correct answer is option A.