A student tried to identify an unknown solution by touching it in the laboratory. Why is this method wrong?
Answer and explanation
Correct answer: Because acids and bases may be corrosive or harmful
Unknown laboratory solutions must never be identified by touching them. They may contain acids, bases, or other harmful chemicals that can irritate, burn, or damage skin. A suitable indicator, test method, protective equipment, and teacher’s instructions should be used instead. Option A is correct; the other choices make scientifically false claims about safety, pH, or metal formation.
Frequently asked questions
What is the correct answer to this question?
Because acids and bases may be corrosive or harmful
Why is this the correct answer?
Unknown laboratory solutions must never be identified by touching them. They may contain acids, bases, or other harmful chemicals that can irritate, burn, or damage skin. A suitable indicator, test method, protective equipment, and teacher’s instructions should be used instead. Option A is correct; the other choices make scientifically false claims about safety, pH, or metal formation.
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.
