Which substance is likely to feel soapy and be basic in nature?
Answer and explanation
Correct answer: Sodium hydroxide solution
The governing concept is the characteristic behaviour of bases. Aqueous bases may feel slippery or soapy because they interact with oils on the skin, but direct contact is unsafe. Sodium hydroxide solution is a strong base, so option C is correct. Vinegar, tamarind juice, and lemon juice contain acids and are therefore plausible acidic distractors, not the expected basic substance.
Frequently asked questions
What is the correct answer to this question?
Sodium hydroxide solution
Why is this the correct answer?
The governing concept is the characteristic behaviour of bases. Aqueous bases may feel slippery or soapy because they interact with oils on the skin, but direct contact is unsafe. Sodium hydroxide solution is a strong base, so option C is correct. Vinegar, tamarind juice, and lemon juice contain acids and are therefore plausible acidic distractors, not the expected basic substance.
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.
