It is not adviasable to:

Options

A. Stir sugar solution with a steel spoon
B. Stiir copper sulphate solution with a silver spoon
C. Stir copper sulphate solution with a zinc spoon
D. Stir silver nitrate solution with a copper spoon

Answer

To determine which actions are not advisable when handling various solutions with different types of spoons, we can analyze the reactivity of the metals involved and their interactions with the solutions. Here’s a step-by-step solution:

### Step 1: Analyze the first scenario
- **Scenario**: Stirring sugar solution with a steel spoon.
- **Analysis**: Steel is an alloy that does not react with sugar solution. Thus, this action is advisable.

### Step 2: Analyze the second scenario
- **Scenario**: Stirring copper sulfate solution with a silver spoon.
- **Analysis**: Silver is less reactive than copper and does not react with copper sulfate. Thus, this action is also advisable.

### Step 3: Analyze the third scenario
- **Scenario**: Stirring copper sulfate solution with a zinc spoon.
- **Analysis**: Zinc is more reactive than copper. If zinc comes into contact with copper sulfate, it will displace copper from the solution, forming zinc sulfate and releasing copper. This reaction is not advisable.

### Step 4: Analyze the fourth scenario
- **Scenario**: Stirring silver nitrate solution with a copper spoon.
- **Analysis**: Copper is more reactive than silver. When copper is used to stir silver nitrate, it will displace silver from the solution, forming copper nitrate and releasing silver. This reaction is also not advisable.

### Conclusion
The actions that are not advisable are:
1. Stirring copper sulfate solution with a zinc spoon.
2. Stirring silver nitrate solution with a copper spoon.

### Final Answer
It is not advisable to:
- Stir copper sulfate solution with a zinc spoon.
- Stir silver nitrate solution with a copper spoon.

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