A solution conducts electricity well and turns blue litmus red. The presence of which ions does this indicate?
Answer and explanation
Correct answer: Hydrogen ions
The governing concept is the behaviour of acids in aqueous solution. Turning blue litmus red is the characteristic test for an acidic solution, which contains hydrogen ions, represented as H+ or hydronium ions in water. These mobile ions also carry electric charge, explaining the good conductivity. Hydroxide ions indicate a base, while chloride and sodium ions alone do not establish acidity.
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What is the correct answer to this question?
Hydrogen ions
Why is this the correct answer?
The governing concept is the behaviour of acids in aqueous solution. Turning blue litmus red is the characteristic test for an acidic solution, which contains hydrogen ions, represented as H+ or hydronium ions in water. These mobile ions also carry electric charge, explaining the good conductivity. Hydroxide ions indicate a base, while chloride and sodium ions alone do not establish acidity.
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.
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