Solid potassium halides react with concentrated sulphuric acid. according to the following equations:
Correct answer: C. C
- A. A
- B. B
- C. C
- D. D
Explanation
The correct answer is Option C. When solid potassium halides react with concentrated sulfuric acid, the oxidation state of sulfur changes in specific ways. In the first reaction, the sulfur is reduced from +6 to +2, indicating a gain of electrons. In the second reaction, sulfur is further oxidized to an oxidation state of +8. Other options do not correctly represent these changes in sulfur's oxidation state, making them incorrect.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Electrochemistry
Electrochemistry describes electron transfer through oxidation and reduction, identifies oxidizing and reducing agents, and applies oxidation numbers to balance redox equations. It also covers electrode potential and the standard hydrogen electrode, which provides the reference for comparing the reduction tendencies of other electrodes.
Practise Electrochemistry
696 free Electrochemistry MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Electrochemistry questions
A redox reaction is shown below:C° + 4HNO3 (conc.) ⟶CO2 + 4NO2 + 2H2OIn this reaction oxidation number of N from nitric acid to NO2 is decreased from _to_.
On the electrolysis of H2SO4 (dil) solution by using inert electrode, which of the following is deposited or released at anode electrode?
On the electrolysis of aqueous solution of Na2SO4 by using inert electrode, which of the following is deposited/released on the cathode electrode?
Which of the following has highest reduction potential?
The reaction which takes place at electrode when electricity is passed through the solution of an electrolyte te is called_.
The tendency of an electrode (substance) to lose or gain electrons when it is in contact with its own ions is called electrode potential (E°). The magnitude of standard electrode potential values depends upon On the following factors EXCEPT: