1. How many S–S linkages are present in thiosulfuric acid, H2S2O3?
A.
0
B.
1
C.
2
D.
3
Correct Answer:
1
Explanation:
Thiosulfuric acid has the structure HO–S(=O)2–SH, which contains one direct sulfur–sulfur linkage.
2. Which oxoacid of sulfur contains a direct S–S linkage between two sulfur atoms?
A.
Sulfuric acid, H2SO4
B.
Pyrosulfuric acid, H2S2O7
C.
Dithionic acid, H2S2O6
D.
Sulfurous acid, H2SO3
Correct Answer:
Dithionic acid, H2S2O6
Explanation:
Dithionic acid has the structure HO3S–S–SO3H, in which the two sulfur atoms are directly joined by an S–S bond.
3. What type of linkage connects the two sulfur atoms in dithionic acid, H2S2O6?
A.
S–S linkage
B.
S–O–S linkage
C.
S–H–S linkage
D.
O–S–O linkage
Correct Answer:
S–S linkage
Explanation:
Dithionic acid is represented as HO3S–S–SO3H, so the sulfur atoms are connected directly by an S–S linkage.
4. How many S–S linkages are present in trithionic acid, H2S3O6?
A.
0
B.
1
C.
2
D.
3
Correct Answer:
2
Explanation:
Trithionic acid contains a chain of three sulfur atoms, –S–S–S–, giving two S–S linkages.
5. Which acid contains an S–S–S chain in its structure?
A.
Dithionic acid
B.
Trithionic acid
C.
Pyrosulfuric acid
D.
Sulfuric acid
Correct Answer:
Trithionic acid
Explanation:
Trithionic acid, H2S3O6, contains three sulfur atoms arranged with two consecutive S–S linkages.
6. Which of the following oxoacids of sulfur contains one S–S linkage and one sulfur atom bonded to hydrogen?
A.
Thiosulfuric acid
B.
Dithionic acid
C.
Pyrosulfuric acid
D.
Sulfuric acid
Correct Answer:
Thiosulfuric acid
Explanation:
Thiosulfuric acid has the structure HO–S(=O)2–SH. It contains one S–S bond, and the terminal sulfur is bonded to hydrogen.
7. In which acid are the sulfur atoms connected through an oxygen atom rather than by a direct S–S bond?
A.
Dithionic acid
B.
Trithionic acid
C.
Pyrosulfuric acid
D.
Thiosulfuric acid
Correct Answer:
Pyrosulfuric acid
Explanation:
Pyrosulfuric acid has the structure HO–S(=O)2–O–S(=O)2–OH, where the sulfur atoms are joined by an S–O–S linkage and not an S–S linkage.
8. Which pair of oxoacids of sulfur both contain direct S–S linkages?
A.
Sulfuric acid and sulfurous acid
B.
Thiosulfuric acid and dithionic acid
C.
Pyrosulfuric acid and sulfuric acid
D.
Sulfurous acid and pyrosulfuric acid
Correct Answer:
Thiosulfuric acid and dithionic acid
Explanation:
Thiosulfuric acid contains one S–S linkage, while dithionic acid also contains a direct S–S linkage between its two sulfur atoms.
9. Which oxoacid of sulfur has no direct S–S linkage but contains an S–O–S bridge?
A.
Thiosulfuric acid
B.
Dithionic acid
C.
Pyrosulfuric acid
D.
Trithionic acid
Correct Answer:
Pyrosulfuric acid
Explanation:
Pyrosulfuric acid contains the bridging arrangement S–O–S, so its sulfur atoms are not directly connected by an S–S bond.
10. If the number of sulfur atoms joined in a continuous chain is three, how many S–S linkages are present?
A.
One
B.
Two
C.
Three
D.
Four
Correct Answer:
Two
Explanation:
In a three-sulfur chain, written as S–S–S, each adjacent pair forms one S–S linkage, giving a total of two.
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