1. Organic chemistry is the study of
Answer: C. carbon-based compounds
Chemistry Class 10 Unit 8: Organic Chemistry MCQs
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2. A displayed formula shows
Answer: A. all the bonds between atoms as individual lines
3. The general formula of alkanes is
Answer: B. CₙH₂ₙ₊₂
4. The general formula of alkenes is
Answer: D. CₙH₂ₙ
5. The general formula of alkynes (one triple bond) is
Answer: B. CₙH₂ₙ₋₂
6. Alkenes contain at least one carbon-carbon
Answer: C. double bond
7. Alkynes contain at least one carbon-carbon
Answer: D. triple bond
8. IUPAC stands for the International Union of
Answer: A. Pure and Applied Chemistry
9. A functional group is
Answer: D. an atom or group of atoms that determines the properties of a class of compounds
10. The stem 'meth' means
Answer: B. one carbon atom
11. The stem 'eth' means
Answer: C. two carbon atoms
12. The stem 'prop' means
Answer: A. three carbon atoms
13. The stem 'but' means
Answer: D. four carbon atoms
14. The stem 'pent' means
Answer: B. five carbon atoms
15. The ending '-ane' indicates a(n)
Answer: C. alkane
16. The ending '-ene' indicates a(n)
Answer: A. alkene
17. The ending '-ol' indicates a(n)
Answer: D. alcohol
18. The ending '-oic acid' indicates a(n)
Answer: B. carboxylic acid
19. In but-2-ene, the double bond is between
Answer: A. C-2 and C-3
20. Which of the following correctly represents but-2-ene?
Answer: C. CH₃CH=CHCH₃
21. The condensed formula of but-2-yne is
Answer: D. CH₃C≡CCH₃
22. The name of CH₃CH₂CH=CHCH₃ is
Answer: A. pent-2-ene
23. Alcohols contain the functional group
Answer: C. –OH (hydroxyl)
24. In naming alcohols, the 'e' of the alkane is replaced by
Answer: B. –ol
25. The name of CH₃OH is
Answer: D. methanol
26. The name of CH₃CH₂OH is
Answer: C. ethanol
27. The compound CH₃CH(OH)CH₃ is named
Answer: A. propan-2-ol
28. Which structural formula represents butan-1-ol?
Answer: B. CH₃CH₂CH₂CH₂OH
29. Propan-1-ol and propan-2-ol have
Answer: A. the same molecular formula
30. Carboxylic acids contain the functional group
Answer: C. –COOH
31. In naming carboxylic acids, the 'e' of the alkane is replaced by
Answer: D. –oic acid
32. The IUPAC name of CH₃COOH (acetic acid) is
Answer: B. ethanoic acid
33. The correct IUPAC name for CH₃CH₂CH₂COOH is
Answer: B. butanoic acid
34. The general formula of an ester is
Answer: C. RCOOR′
35. The reaction of an alcohol with a carboxylic acid to form an ester is called
Answer: D. esterification
36. The catalyst used in esterification is a few drops of
Answer: A. dilute sulphuric acid
37. The ester formed from ethanoic acid and methanol is
Answer: C. methyl ethanoate
38. The ester formed from methanol and propanoic acid is
Answer: A. methyl propanoate
39. Which ester can be formed from ethanoic acid and butan-1-ol?
Answer: D. CH₃COOCH₂CH₂CH₂CH₃
40. Which name is incorrect for its formula?
Answer: B. But-2-ene: CH₃CH₂CH=CH₂
About Chemistry Class 10 Unit 8 MCQs (Federal Board)
These 40 Chemistry MCQs cover Class 10 Unit 8: Organic Chemistry of the Federal Board (FBISE) SSC-II (Class 10) syllabus. They are SLO-based MCQs as per the new pattern for FBISE exams. Each question has four options and the correct answer is shown, so you can practise for the annual examination and find the topics you still need to revise. You can also read the Organic Chemistry notes for this chapter. Download the Organic Chemistry MCQs as a PDF using the button at the top of this page.