1. The correct statement is: The electrodes must be two different metals. In a simple chemical cell, the two electrodes are typically made of different metals to create a potential difference, or voltage.

2. The electrical current in a chemical cell is caused by: The flow of electrons from the more reactive metal to the less reactive metal. This flow of electrons is what we observe as electricity.

3. The function of the paste of ammonium chloride in a zinc/carbon chemical cell is: To act as an electrolyte. An electrolyte is a substance that produces an electrically conducting solution when dissolved in a polar solvent.

4. The balanced equation of the overall reaction that takes place in a fuel cell is: H2 + O2 → 2H2O. This reaction represents the combination of hydrogen and oxygen to produce water, which is the principle behind the operation of a hydrogen fuel cell.

5. A disadvantage of using hydrogen as a fuel is: Hydrogen gas is highly flammable. While hydrogen has many advantages as a fuel, its high flammability makes it potentially dangerous to use.

6. The statement about hydrogen-oxygen fuel cells that is not true is: An acidic electrolyte is required. While some types of fuel cells do use acidic electrolytes, this is not a requirement for all hydrogen-oxygen fuel cells. Some types, such as alkaline fuel cells, use a basic electrolyte instead.

Question

1. The correct statement is: The electrodes must be two different metals. In a simple chemical cell, the two electrodes are typically made of different metals to create a potential difference, or voltage.

2. The electrical current in a chemical cell is caused by: The flow of electrons from the more reactive metal to the less reactive metal. This flow of electrons is what we observe as electricity.

3. The function of the paste of ammonium chloride in a zinc/carbon chemical cell is: To act as an electrolyte. An electrolyte is a substance that produces an electrically conducting solution when dissolved in a polar solvent.

4. The balanced equation of the overall reaction that takes place in a fuel cell is: H2 + O2 → 2H2O. This reaction represents the combination of hydrogen and oxygen to produce water, which is the principle behind the operation of a hydrogen fuel cell.

5. A disadvantage of using hydrogen as a fuel is: Hydrogen gas is highly flammable. While hydrogen has many advantages as a fuel, its high flammability makes it potentially dangerous to use.

6. The statement about hydrogen-oxygen fuel cells that is not true is: An acidic electrolyte is required. While some types of fuel cells do use acidic electrolytes, this is not a requirement for all hydrogen-oxygen fuel cells. Some types, such as alkaline fuel cells, use a basic electrolyte instead.

Knowee AI · Accepted Answer

1. The correct statement is: The electrodes must be two different metals. In a simple chemical cell, the two electrodes are typically made of different metals to create a potential difference, or voltage.

2. The electrical current in a chemical cell is caused by: The flow of electrons from the more reactive metal to the less reactive metal. This flow of electrons is what we observe as electricity.

3. The function of the paste of ammonium chloride in a zinc/carbon chemical cell is: To act as an electrolyte. An electrolyte is a substance that produces an electrically conducting solution when dissolved in a polar solvent.

4. The balanced equation of the overall reaction that takes place in a fuel cell is: H2 + O2 → 2H2O. This reaction represents the combination of hydrogen and oxygen to produce water, which is the principle behind the operation of a hydrogen fuel cell.

5. A disadvantage of using hydrogen as a fuel is: Hydrogen gas is highly flammable. While hydrogen has many advantages as a fuel, its high flammability makes it potentially dangerous to use.

6. The statement about hydrogen-oxygen fuel cells that is not true is: An acidic electrolyte is required. While some types of fuel cells do use acidic electrolytes, this is not a requirement for all hydrogen-oxygen fuel cells. Some types, such as alkaline fuel cells, use a basic electrolyte instead.

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