Which experiment gives the most direct evidence for the presence of ions in an acidic solution?
Answer and explanation
Correct answer: Passing electric current through the solution
The governing concept is electrical conduction by mobile charged particles. When an acid dissolves in water, it forms ions such as hydronium and accompanying negative ions. These ions move between electrodes and carry electric charge, so measurable current or conductivity is direct evidence of their presence. Option B is correct; smelling, cooling, or inserting glass does not demonstrate mobile ions.
Frequently asked questions
What is the correct answer to this question?
Passing electric current through the solution
Why is this the correct answer?
The governing concept is electrical conduction by mobile charged particles. When an acid dissolves in water, it forms ions such as hydronium and accompanying negative ions. These ions move between electrodes and carry electric charge, so measurable current or conductivity is direct evidence of their presence. Option B is correct; smelling, cooling, or inserting glass does not demonstrate mobile ions.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
Student feedback
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
