CHE 112: Introduction to Organic Chemistry pass Questions paper

 CHE 112: Introduction to Organic Chemistry Exam Questions

1. Which compound is an alkene?  

   a) CH₃CH₃  

   b) CH₃CH₂OH  

   c) CH₂=CH₂  

   d) CH≡CH  

2. The IUPAC name of CH₃CH₂CH₂CH₃ is:  

   a) Propane  

   b) Butane  

   c) Pentane  

   d) Ethane  

3. The hybridization of carbon in methane (CH₄) is:  

   a) sp  

   b) sp²  

   c) sp³  

   d) sp³d  

4. Which pair represents structural isomers?  

   a) Ethanol and Methanol  

   b) Butane and Isobutane  

   c) Ethene and Ethyne  

   d) Propane and Cyclopropane  

5. Which is more acidic?  

   a) Phenol  

   b) Ethanol  

6. The reaction CH₃CH₂Br + KOH → CH₂=CH₂ + KBr + H₂O is an example of:  

   a) Substitution  

   b) Addition  

   c) Elimination  

   d) Oxidation  

7. Which compound is aromatic?  

   a) Cyclohexane  

   b) Benzene  

   c) Ethene  

   d) Acetylene  

8. The bond angle in a tetrahedral carbon is approximately:  

   a) 90°  

   b) 109.5°  

   c) 120°  

   d) 180°  

9. Which has a higher boiling point?  

   a) Hexane  

   b) 1-Hexanol  

10. Which reaction is bimolecular?  

    a) SN1  

    b) SN2  

11. Which reagent adds to alkenes via electrophilic addition?  

    a) Br₂  

    b) NaOH  

    c) NaNH₂  

    d) H₂O  

12. The most stable conformation of ethane is:  

    a) Eclipsed  

    b) Staggered  

13. Benzene has how many resonance structures?  

    a) 2  

    b) 3  

    c) 4  

    d) 6  

14. Oxidation of a primary alcohol produces:  

    a) Ketone  

    b) Aldehyde  

    c) Carboxylic acid  

    d) Ester  

15. Which carbon is chiral in CH₃CHClCOOH?  

    a) First carbon  

    b) Second carbon  

    c) Third carbon  

    d) None  

16. All organic compounds contain carbon.

TRUE OR FALSE

17. Alkanes are unsaturated hydrocarbons. 

TRUE OR FALSE

18. A primary alcohol has one carbon attached to the alcohol-bearing carbon. 

TRUE OR FALSE

19. Benzene undergoes addition reactions easily. 

TRUE OR FALSE

20. SN2 reactions proceed with inversion of configuration.

TRUE OR FALSE

21. The suffix for aldehydes in IUPAC naming is -ol.

TRUE OR FALSE  

22. Ethylene has a triple bond.

      TRUE OR FALSE

23. Enantiomers are mirror images. 

TRUE OR FALSE

24. Tertiary carbocations are less stable than primary.

       TRUE OR FALSE

25. Ketones can be oxidized to carboxylic acids.

TRUE OR FALSE

26. The IUPAC name of CH₃CH₂CH₂CH₃ is __________.  

27. A carbon atom with four different groups attached is called a __________.  

28. The geometry of a carbon in sp³ hybridization is __________.  

29. A reaction where two molecules combine to form a larger molecule with the loss of H₂O is __________.  

30. The functional group -COOH is called __________.  

31. Benzene has __________ π electrons.  

32. Breaking a bond using water is called __________.  

33. The major product of HCl + propene is __________.  

34. Glucose and fructose exhibit __________ isomerism.  

35. The reagent used to test for alkenes is __________.  

36. The bond angle in benzene is __________ degrees.  

37. The general formula for alkanes is __________.  

38. CH₃OCH₃ is named __________.  

39. The reaction C₂H₅OH → C₂H₄ + H₂O is an example of __________.  

40. The strongest intermolecular force in acetone is __________.