In which order does acidity decrease and basicity increase?
Answer and explanation
Correct answer: pH 2 to pH 7 to pH 10
The governing concept is the pH scale: lower pH means greater acidity, pH 7 is neutral at ordinary school-level conditions, and values above 7 indicate increasing basicity. Thus moving from pH 2 to pH 7 reduces acidity to neutrality, and continuing to pH 10 increases basicity. Option B reverses the direction; C and D do not show a continuous decrease in acidity with increasing basicity.
Frequently asked questions
What is the correct answer to this question?
pH 2 to pH 7 to pH 10
Why is this the correct answer?
The governing concept is the pH scale: lower pH means greater acidity, pH 7 is neutral at ordinary school-level conditions, and values above 7 indicate increasing basicity. Thus moving from pH 2 to pH 7 reduces acidity to neutrality, and continuing to pH 10 increases basicity. Option B reverses the direction; C and D do not show a continuous decrease in acidity with increasing basicity.
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.
