HYDROCARBON QUIZES Part I

1. You encounter many organic compounds everyday. Some organic compounds are ethanol (grain alcohol), ethylene glycol (automobile antifreeze), and acetone (nail polish remover). Another organic compound which can be found in the daily life is ….

a. salt
b. water
c. sugar
d. bone
e. mineral

2. Hydrocarbon is one of the organic compound that mainly contains ….
a. carbon
b. hydrogen
c. oxygen
d. carbon and hydrogen
e. carbon and oxygen

3. Hydrocarbons are classified into two main types, aliphatic and aromatic. The following substances which cannot be classified as an aliphatic hydrocarbon is ….

a. alkane
b. alkene
c. alkyne
d. benzene
e. cycloalkane

4. Closed chains of carbon atoms can be explained as ….
a. a chain which only has carbon atoms
b. a cyclic bond among carbon atoms
c. a bond among carbon atoms that form a branched chains
d. a cyclic chain which has a double bond
e. a special chain which contains carbon and hydrogen atoms

5. The special features of carbon below are correct, except ….
a. has tetravalence
b. forms covalence of four
c. can bond one of another
d. the atomic number is 6
e. makes possible branched chains

6. A hydrocarbon in which all carbon atoms are bonded to the maximum number of hydrogen atoms is classified as … hydrocarbon
a. saturated
b. aromatic
c. alkene
d. alkyne
e. cyclic

7. Unsaturated hydrocarbons are ….
a. alkane and alkene
b. alkane and alkyne
c. alkene and alkyne
d. cycloalkane and alkene
e. alkane, alkene, and alkyne

8. Methane is the simplest hydrocarbon. The wrong statement about methane is ….
a. consists of one carbon atom
b. there are 8 electron’s pairs
c. four hydrogen atoms are bonded
d. has four C—H bonds
e. forms a tetrahedral structure

9. The general molecular formula of alkanes is ….
a. CnHn
b. CnH2n
c. CnH3n
d. CnH2n+2
e. –CnH2n+1–

10. What is the common name for the following alkyl group?
       CH3 - C(CH3)3 -
a. Isobutyl
b. Isopropyl
c. tert-butyl
d. sec-butyl
e. isopropyl

11. A homologous series of alkanes is a series of alkane compounds in which one compound differs from a preceding one by ….
a. –CH–
b. –CH2–
c. –CH3
d. –CnH2n–
e. –CnH2n+1–

12. Members of a homologous series have similar … properties.
a. chemical
b. physical
c. general
d. natural
e. special

13. The number of C atoms primer, secunder, tertier of CH3(CH2)2CH(CH3)CH2C(CH3)3 are ….
a. 5, 1,1, 1
b. 4, 2, 1, 1
c. 5, 2, 1, 1
d. 4, 2, 2, 1
e. 4, 1, 2, 1

14. Which compound is likely to have the highest boiling point?
a. n-butane
b. n-hexane
c. decane
d. C13H18
e. C8H18

15. Which one of the following hydrocarbons is a gas at room temperature and pressure?
a. Propane
b. Hexane
c. Octane
d. Nonane
e. Decane

16. What is the IUPAC name of the molecule whose carbon skeleton is shown below?
C
│
C C C
│ │ │
C - C - C - C – C
a. nonane
b. 2,3 – dimethylheptane
c. 1-ethyl - 3,4 – dimethylpentane
d. 5 - ethyl - 2,3 – dimethylpentane
e. 2,3 - dimethyl - 5 – ethylpentane

17. The IUPAC name of the following compound is ....
       CH(CH3)3
a. butane
b. n-butane
c. isobutane
d. cyclobutane
e. 2-methylpropane

18. The condensed structural formula of 4-ethyl-3-methylheptane is ….
a. C2H5CH(CH3)CH(C2H5)(CH2)2CH3
b. C2H5CH(CH3)CH(C2H5)(CH2)2CH3
c. C2H5CH(CH3)CH(C2H5)(CH2)2CH3
d. C2H5CH(CH3)CH(C2H5)(CH2)2CH3
e. C2H5CH(CH3)CH(C2H5)(CH2)2CH3

19. A compound mistakenly named: 3,4-dimethylbutane should be named correctly as ....
a. 2-methylpentane
b. 3-methylpentane
c. 4-methylpentane
d. 2,2-dimethylbutane
e. 2,3-dimethylbutane

20. The IUPAC name of CH3CH2C(CH3)2(CH2)4CH3 is ….
a. 3-methyloctane
b. 3-dimethyloctane
c. 3,3-dimethyloctane
d. 3-dimethylheptane
e. 3,4-dimethyloctane

21. What is best name for the molecule below?
       CH(CH3)(C2H5) - CH(CH3)(C2H5)
a. 3,4-dimethylhexane
b. 3,4-dimethylhexene
c. 2,3-diethylbutane
d. 2-ethyl-3-methylpentane
e. 4-ethyl-3-methylpentane

22. Which is 3-ethyl-2-methylpentane?
a. CH(CH3)-CH(C2H5)2
b. C(CH3)3-CH(C2H5)2
c. CH(CH3)2-CH(C2H5)2
d. CH(CH3)2-CH(CH3)4
e. CH(CH3)2-CH(CH3)(C3H7)

23. The name of CH3CH2CHClCH3 is ….
a. chlorobutane
b. 1-chlorobutane
c. 2-chlorobutane
d. 3-chlorobutane
e. chloro-2-butane

24. The name of this compound is ….
       C6H5CH3
a. methylhexane
b. methylbenzene
c. hexylmethane
d. 1-methylcyclohexane
e. Methylcyclohexane
25. The following compound is named ….
      C6H4Cl2
a. 1,4-dichlorocyclohexane
b. 2,5-dichlorocyclohexane
c. p-dichlorobenzene
d. dichlorocyclohexane
e. 1,4-dichlorobenzene

26. Unsaturated organic compounds contain at least one double or triple bond. These can be shown as ....
a. – C – C – and – C = C –
b. – C – C – and – C ≡ C –
c. – C ≡ C – and – C = C –
d. – C – C – and – C = C = C –
e. – C – C – and – C ≡C = C –

27. Which one of the following hydrocarbons is classified as unsaturated?
a. C2H4
b. C3H8
c. C4H10
d. C6H14
e. C10H22

28. A functional group ....
1. is where chemical reactions occur in an organic molecule
2. determine the family name of the compound
3. is a specific atom or group of atoms
a. 1 only
b. 2 only
c. 3 only
d. 1 and 2
e. 1, 2, and 3

29. The functional group in alkenes is ….
a. a benzene ring
b. an alkene ring
c. a carbon-carbon double bond
d. a carbon-carbon single bond
e. a carbon-carbon triple bond

30. What is the IUPAC name of the molecule whose carbon skeleton is shown below?
C - C - C = C - C
a. 3 – pentane
b. 3–pentene
c. 2 – pentene
d. 2 – pentyne
e. 3 – pentyne

31. The following compounds are alkenes, except ….
a. CH2C(CH3)CH(CH3)2
b. CH3(CH)2CH3
c. C(CH3)3C(CH3)CH2
d. C2H5(CH)2CH3
e. C(CH3)4

32. The homolog series of alkenes are ….
a. C6H10 – C2H2
b. C3H6 – C4H6
c. C4H10 – C3H8
d. C5H8 – C5H12
e. C5H10 – C7H14

33. From the following formulas, 3-methyl-1-butene is ….
a. CH2CHCH3
b. CH2CHCH2CH3
c. CH3C(CH3)CH2
d. CH3CHCHCH3
e. CH3CH(CH3)CHCH2

34. The name of CH2=CHCH(CH3)CH3 is ….
a. 2-2 dimethyl-1-propene
b. 2-methyl-3-butene
c. 2-methyl-2-butene
d. 3-methyl-1-butene
e. 3-methyl-2-butene

35. A compound has two double bonds. This can be classified as ….
a. 2-alkene
b. dialkene
c. double alkene
d. alkadiene
e. alkyne

36. The name of CH2 = C = C(CH3)2 is ….
a. 1-methyl-1,2-butadiene
b. 2-methyl-1,2-butadiene
c. 2-methyl-2,3-butadiene
d. 3-methyl-2,3-butadiene
e. 3-methyl-1,2-butadiene

37. What is best name for the molecule below?
CHCCH(CH3)2
a. 3-methyl-2-butyne
b. 3-methyl-2-butene
c. 3,3-dimethyl-1-propyne
d. 1,1-dimethyl-2-propyne
e. none of the above

38. The possible name of (CH3)2CHCH2C ≡ CH is ....
a. methylpentyne
b. 1-methyl-1-pentyne
c. 4-methyl-1-pentyne
d. 1-methyl-4-pentyne
e. 4-methyl-4-pentyne

39. One of the following compounds which has the same number of carbon and hydrogen atoms with heptyne is …
a. 2-methyl-1-hexyne
b. 4-methyl-1-hexyne
c. 4-methyl-4-hexyne
d. 1,2-dimethyl-1-pentyne
e. 2,3-dimethyl-2-pentyne

40. The possible name of a cycloalkene which contains 5 carbon atoms is ….
a. methylcyclobutene
b. 1-methyl-1-cyclobutene
c. 1-methylcyclobutene
d. methyl-1-cyclobutene
e. 2-methylcyclobutene

THE ANSWER OF ACIDS AND BASES QUIZ Part IV

1.      NH₃ + H₂O ↔ NH₄⁺ + OH^-

The correct statement is ….

1. NH₃ is acid
2. NH₄⁺ is conjugate acid of NH₃
3. H₂O is base
4. OH^- is conjugate base of NH₄⁺
5. NH₃-H₂O are conjugate acid and conjugate base

2.      H₂O + HCO₃^- ↔ H₂CO₃ + OH^-  The bases are ….

1. H₂O and HCO₃^-                
2. H₂CO₃ and H₂O
3. H₂CO₃ and OH^-   
4. H₂O and OH^-
5. HCO₃^- and OH^-          

3.      From the above equation, the correct statement is ….

a. H₂O is a weak acid      

b. HCO₃^- is neutral

c. OH^- is a weak base

d. H₂CO₃ is a weak acid

4.    H₂O + HCN  ↔  CN^- + H₃O⁺

In this equation ….

a.       HCN is a base

b.      H₂O and HCN are a weak base and a weak acid     

c.       H₃O⁺ is a base

d.      CN^- is a conjugate acid of HCN

5.      H₂O + HSO₄^-  ↔  SO₄^2- + H₃O⁺

The wrong statement is ….

a.       as an acid, HSO₄^- is weaker than H₃O⁺

b.      as a base, HSO₄^- is stronger than H₃O⁺

c.       as an acid, H₂O is weaker than H₃O⁺

d.      as a base, H₂O is stronger than SO₄^2-

6.      Known 5 equations below:

      1. H₂O + NH₃  ↔  NH₄⁺ + OH^-

      2. H₂O + HF  ↔  H₃O⁺ + F^-

      3. H₂O + NH₃  ↔  NH₂^- + H₃O⁺

      4. H₂O + HCN  ↔  CN^- + H₃O⁺

      5. H₂O + HSO₄^-  ↔  SO₄^2- + H₃O⁺

      According to Bronsted–Lowry, H₂O as an acid and a base are in number  ....

      a. 1 and 2

      b. 2 and 3

      c. 2 and 4

      d. 2 and 5

      e. 4 and 5

7.      The difference between acid and conjugate base is ….

a. a proton            

b. a neutron

c. an electron

d. a nucleus

8.      A substance that may act as both an acid and a base is ….

a. a hydride
b. a hydroxide
c. disproportionate
d. amphoteric                   
e. a salt

9.      Which of the following would be the most basic substance in aqueous solution?

a. HSO₄^-
b. F^-                      
c. I^-
d. Cl^-
e. NO₃^-

10.  Which of the following would be the most acidic substance in aqueous solution?

a. Na⁺                    d. SO₄^2-
b. H₂O                   e. NH₂^-
c. NH₄⁺     

11.  According to the Lewis theory, a base:

a.       is a proton acceptor.

b.      is a proton donor.

c.       makes available a share in a pair of electrons.         

d.      is any compound that contains electron pairs.

e.       accepts a share in a pair of electrons.

12.  Based on the reactions we have studied, ammonia can be considered as

a.       an Arrhenius base (only).

b.      a Lewis base (only).

c.       a Bronsted-Lowry base (only).

d.      both an Arrhenius base and a Lewis base.

e.       both a Bronsted-Lowry base and a Lewis base.    

13.  Which statement concerning the autoionization (self-ionization) of water is FALSE?

2 H₂O(l) <==> H₃O⁺ + OH^-(aq)

a.       This reaction is an acid-base reaction according to the Bronsted-Lowry theory.

b.      Water is amphiprotic.

c.       A H₂O molecule may react as an acid by donating a proton.

d.      In this reaction H₃O⁺ and OH^- are a conjugate acid-base pair          

e.       A H₂O molecule may react as a base by accepting a proton.

THE ANSWER OF ACIDS AND BASES QUIZ Part III

1.      The conjugate base of acetic acid (CH₃COOH) is ….

a. CH₃COO^-
b. CH₃COOH₂⁺
c. CH₂COO₂^-
d. CHCOO₃^-
e. CCOOH₂^-

2.      The conjugate acid of the weak base methylamine (CH₃NH₂) is ….

a. CH₃N₂^-
b. CH₃NH^-
c. CH₃NH₃⁺
d. CH₃NH₃^-
e. CH₃NH₄²⁺

3.      The sunscreen agent, para-aminobenzoic acid (C₇H₇NO₂) can act as a base. What is the conjugate acid of this compound?

a.   C₇H₈NO₂
b.   C₇H₈NO₂⁺         
c.   C₇H₇NO₂)^-
d.   C₇H₈NO₂^-
e.   C₇H₇NO₂⁺

4.      Urea (CON₂H₄) is a base. What is its conjugate acid?

a.   CON₂H₅
b.   CON₂H₅⁺           
c.   CON₂H₃^-
d.   CON₂H₃⁺
e.   CON₂H₅^-

5.      Hydrazine (N₂H₄), formerly used as a rocket fuel, is a base. What is its conjugate acid?

a.   N₂H₄^-
b.   N₂H₅⁺                  
c.   N₂H₃⁺
d.   N₂H₅
e.   N₂H₅^-

6.      In terms of base strength, OH^- is … CH₃COO^-.

a. stronger than    
b. weaker than
c. the same as

d. different with

7.      Which definition of an acid is more restrictive? In other words, which definition includes fewer substances in its definition of an acid?

a.      Arrhenius

b.      Brønsted-Lowry

c.      Lewis

d.      Arrhenius and Bronsted-Lowry

e.      Arrhenius and Lewis

8.      Conjugate acid-base pair is ….

a. an acid and base that react to form water
b. a pair of acids with similar structures
c. two substances related by the donation/acceptance of a proton
d. two substances that have the same acid-base effect in water.

9.      Which of the following pairs does not represent a conjugate acid-base pair?

a. HClO₄ / ClO₄^-
b. HCl / Cl^-
c. H₂SO₄ / SO₄^2-
d. H₂O / OH^-
e. NH₃ / NH₄⁺

10.  Identify the Brønsted-Lowry acids and bases (conjugate pairs) in the following equation. (A= B-L acid; B= B-L base)

HC₂H₃O₂ + CN- = HCN + C₂H₃O₂^–

a. B A B A
b. B B A A
c. A B A B
d. A B B A
e. B A A B

11.  The conjugate of a weak base is …

a. a strong base
b. a weak base
c. a strong acid
d. a weak acid
e. None of these

12.  Which of these is the weakest conjugate base?

a. NH₂^–                  d. Cl^-
c. C₂H₃O₂^–           e. CN^-
e. SO₄^2–

13.  Sunscreen agents contain para-aminobenzoic acid (C₇H₇NO₂). What is the conjugate base of this acid?

a.   C₇H₈NO₂⁺
b.   C₇H₇NO₂^-
c.   C₇H₈NO₂^-
d.   C₇H₆NO₂⁺
e.   C₇H₆NO₂^-                   

14.  Oxalic acid (C₂H₂O₄) is found in rhubarb and spinach. What is its conjugate base?

a.   C₂HO₄⁺
b.   C₂H₃O₄
c.   C₂H₃O₄^-
d.   C₂H₃O₄⁺
e.   C₂HO₄^-                       

15.  What is the conjugate acid of aniline, C₆H₅NH₂?

a.   C₆H₅NH₂⁺
b.   C₆H₅NH₃^-
c.   C₆H₅NH^-
d.   C₆H₅NH₂^-
e.   C₆H₅NH₃⁺                   

THE ANSWER OF ACIDS AND BASES QUIZ Part II

1.      Of the following, … is turning blue litmus red.

a.      orange juice

b.      lemon juice

c.      vinegar

d.      ammonia        

 

2.      A common substance that contains acetic acid is ….

a. vinegar                         
b. ammonia water
c. salad oil
d. soap

e. table salt

3.      Of the following, _____ is not a characteristic of an acid.

a. tasting sour
b. turning red litmus blue 
c. turning blue litmus red
d. producing hydrogen ions in solution

 

4.      Of the following, _____ is not characteristic of a base.

a.      turning red litmus blue

b.      tasting bitter

c.      producing hydroxide ions in solution

d.      producing a solution with a pH (-log [H⁺]) less than 7            

5.      When dissolved in water, salts ….

a. are nonelectrolytes
b. have a bitter taste
c. are electrolytes            
d. release hydrogen ions

6.      A base can be prepared by the reaction between ….

a. an active nonmetal with water
b. a gas with water
c. a sulfide with water
d. an active metal with water       

7.      Of the following, the property that most closely relates to acids is ….

a. bitter taste
b. contains hydroxide polyatomic ion

c. sour taste         
d. salty taste

8.      When an acid is dissolved in water, it usually forms ….

a. hydrogen ions  
b. hydroxide ions
c. no ions
d. chloride ions

e. simple molecules

9.      The acid used in the storage battery in your car is ….

 a. nitric acid
b. hydrochloric acid
c. tartaric acid
d. sulfuric acid      

10.  The sour taste of lemons and limes is due to a substance called ….

a. acetic acid
b. citric acid                      
c. hydrochloric acid
d. carbonic acid

e. oxalate acid

11.  The hydrogen halides are all polar molecules which form acidic solutions. Which of the following is the  weakest acid?

a.    HF                    c. HCl

b.    HBr                  d. HI

12.  Identify the strong acid ….

a.      HF

b.      H₂O

c.      HClO₄

d.      HCN

e.      HCO₃^-

13.  In the following reaction, … is a base.

      HClO₄(aq)+KOH(aq)àKClO₄(aq)+H₂O(l)

a. KOH     
b. H₂O
c. HClO₄
d. KClO₄

14.  In the following reaction, … is an acid.
H₃PO₄(aq) + 3NaOH(aq) à Na₃PO₄(aq) + 3H₂O(l)

a. H₂O
b. H₃PO₄
c. NaOH
d. Na₃PO₄

15.  In the following reaction, ... is a salt.

H₃PO₄(aq) + 3NaOH(aq) à Na₃PO₄(aq) + 3H₂O(l)

a. H₃PO₄
b. H₂O
c. NaOH
d. Na₃PO₄            

16.  ... is a Brønsted-Lowry base, but not an Arrhenius base.

a. KOH
b. NaOH
c. NH₃                   
d. LiOH
e. Sr(OH)₂

17.  Of the following, … is not a base.

a. NH₄OH
b. NaOH
c. KOH
d. HCOOH                       
e. CH₃COO^-

 

THE ANSWER OF ACIDS AND BASES QUIZ Part I

1.   The first theory of acid and base comes from Arrhenius.  According to this theory ….

a.      an acid is a substance that accepts a hydrogen ion.

b.      a base is a substance that accepts a hydrogen ion.

c.      a base is a substance that accepts a hydroxide ion.

d.      an acid is a substance that accepts a hydroxide ion.

e.      In water,an acid produces hydrogen ions                

   2.   A strong base is ….

a.      an electrolyte

b.      a strong electrolyte    

c.      a weak electrolyte

d.      anion

e.      cation

3.   Strong acids are ….

a.      HF and HCl

b.      HNO₃ and HI              

c.      CH₃COOH and H₂S

d.      H₃PO₄ and H₂SO₄

e.      HOCl and HOCl₂

4.   Organic acids contain a carboxyl group— a group that contains an acidic hydrogen that can ionize. The formula for the carboxyl group is ….`

a.      –NH₂

b.      –OH

c.      –CH₃

d.      –OCH₃

e.      –COOH          

5.   The acid strength of HCl is … the acid strength of HNO₃ in aqueous solution.

a. the same as     

b. greater than
c. less than

6.   In an oxyacid, the acidic hydrogen is always attached to ….

a.      anion

b.      another atom

c.      may be anion

d.      may be oxygen or another atom

e.      one of the oxygen atoms       

7.   Weak acids are ….

a. H₂SO₄, HI
b. HCl, HBr
c. HNO₂, HF         
d. HNO₃,H₂SO₃
e. HClO₄, HClO₃

8.   For a group of acids at the same concentration, the correct statement is ….

a. the weakest acid will be the most ionized
b. the strongest acid will be the least ionized
c. the weakest acid will be an Arrhenius acid
d. the strongest acid will be the most ionized     

            

9.   Which of the following is the weakest acid?

a.   H₃PO₃
b.   H₃AsO₄
c.   H₃AsO₃          
d.   H₃PO₄

10.  Which of the following is the strongest acid?

a.   H₂SeO₄
b.   H₂SO₄            
c.   HSO₄^-
d.   HSeO₄^-

11.  Which of the following is the weakest acid?

a.   HCl
b.   HClO
c.   HBr
d.   HBrO              

12.  Which of the following acids is a diprotic, weak acid?

a. carbonic                       
b. hydrochloric
c. perchloric
d. acetic
e. sulfuric

13.  In general, salts ….

a. are ionic compounds   
b. contain hydrogen ions
c. contain hydroxide ions
d. turn litmus red

14.  When bases ionize they release ….

a. hydrogen ions
b. sodium ions
c. chloride ions
d. hydroxide ions              

15.  An element common to all acids is ...

a. chlorine
b. nitrogen
c. oxygen
d. hydrogen          

16.  A base used in the manufacture of soap is ….

a. calcium hydroxide
b. sodium hydroxide         
c. ammonia
d. zinc hydroxide