Phosphene gas will be produced if phosphorous acid is subjected to___________________?
Correct answer: D. Both b & c
- A. Oxidation
- B. Reduction
- C. Decomposition
- D. Both b & c
Explanation
H3PO3 undergoes disproportionation on heating: some phosphorus(III) is oxidised to phosphorus(V) in H3PO4, while some is reduced to phosphorus(-III) in PH3. Therefore the process is both oxidation-reduction and decomposition, making “both b and c” correct; oxidation alone is the likely distractor because it ignores PH3 formation.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Redox Reactions
Redox reactions involve oxidation and reduction occurring together, with electrons transferred between species or oxidation numbers changing. The topic covers assigning oxidation states, identifying oxidizing and reducing agents, balancing redox equations by oxidation number or half-reaction methods, and connecting chemical changes with galvanic and electrolytic cells.
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 Redox Reactions questions
The composition of brown ring in nitrate test is_________________?
FeSO4 forms brown ring with________________?
The O-O linkage is present in__________?
Any process of chemical decay of metals due to the action of surrounding medium is called__________________?
When an active metal like Al comes in contact with less active element like Cu then it produces__________________?
Pure metal__________________?