Among two acids of equal concentration, the first is a better conductor of electricity. Based on this, what can the first acid be like?
Answer and explanation
Correct answer: More-ionised strong acid
The governing concept is that electrical conductivity of an aqueous acid depends mainly on the concentration of mobile ions. At equal analytical concentration, an acid that ionises to a greater extent produces more H⁺ and corresponding negative ions, so it carries current better. Therefore, the first acid is most likely a more highly ionised strong acid. A weak acid gives fewer ions, while a neutral salt or insoluble solid does not fit the stated acid behaviour.
Frequently asked questions
What is the correct answer to this question?
More-ionised strong acid
Why is this the correct answer?
The governing concept is that electrical conductivity of an aqueous acid depends mainly on the concentration of mobile ions. At equal analytical concentration, an acid that ionises to a greater extent produces more H⁺ and corresponding negative ions, so it carries current better. Therefore, the first acid is most likely a more highly ionised strong acid. A weak acid gives fewer ions, while a neutral salt or insoluble solid does not fit the stated acid behaviour.
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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