Discussion
When a small amount of copper powder is added to ZnSO4 solution, what would be the observation ?
Answer: D
The observation would be No reaction.
A metal can displace another from solution only if it is more reactive, that is, if it has a more negative reduction potential. Copper (E° Cu2+/Cu = +0.34 V) lies well below zinc (E° Zn2+/Zn = -0.76 V), so copper cannot reduce Zn2+. The reverse reaction, zinc displacing copper from CuSO4, is the one that happens.
A blue solution would require Cu2+ ions to form, which needs copper to be oxidised. Effervescence would need a gas such as hydrogen, which copper does not release from a neutral salt solution, and no white solid is formed.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development