Acids, Bases and Salts Practice

Solve chapter-level practice questions for Acids, Bases and Salts with reveal-only solutions and quick revision support.

Practice Set 1 - Indicators and Definitions

Quick concept checks.

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Q1.
What is an indicator?
Q2.
What happens to blue litmus in an acid?
Q3.
What happens to phenolphthalein in a base?
Q4.
Why does dry HCl gas not change dry litmus paper?
Q5.
Name one natural indicator used in Indian homes.
Q6.
What is meant by an alkali?
Q7.
State the pH of a neutral solution.

Practice Set 2 - Chemical Properties

Equations and reaction patterns.

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Q1.
What is formed when an acid reacts with a metal?
Q2.
Name the gas produced when an acid reacts with a carbonate.
Q3.
How is carbon dioxide tested?
Q4.
Write the balanced equation for NaOH + HCl.
Q5.
Why is ZnO called amphoteric?
Q6.
Name one base used to neutralise excess acid in the stomach.
Q7.
What is formed when a base reacts with a non-metal oxide?

Practice Set 3 - pH and Daily Life

Application-oriented answers.

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Q1.
Why are antacids used?
Q2.
Why should toothpaste be basic?
Q3.
At what pH does tooth decay usually begin?
Q4.
Why is soil pH important?
Q5.
What is the role of pH in a bee sting remedy?
Q6.
What does a low pH value indicate?
Q7.
Can a solution with pH 9 be acidic?

Practice Set 4 - Salts

Common salts and uses.

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Q1.
What is the formula of baking soda?
Q2.
What is the formula of washing soda?
Q3.
Write one use of bleaching powder.
Q4.
What is plaster of Paris used for?
Q5.
Name the products of the chlor-alkali process.
Q6.
Why is baking soda used in baking powder?
Q7.
How is washing soda useful in homes?

Practice Set 5 - Long Answer Revision

Mixed board-style revision.

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Q1.
Explain why acids and bases conduct electricity in aqueous solution.
Q2.
Differentiate between strong acid and concentrated acid.
Q3.
Write a note on neutralisation with one daily-life example.
Q4.
Describe the uses of baking soda and washing soda.
Q5.
Why are indicator-based questions easy to score?
Q6.
What is the significance of the pH scale?
Q7.
Why is this chapter important for board exams?

Quick Q&A Before You Revise

Does a strong acid always have low pH?

Usually yes in comparable solutions, but pH also depends on concentration, not only on strength.

Why is water necessary for acidity or basicity?

Water is needed because acids and bases show their characteristic behaviour only after forming ions in aqueous solution.

Is every base an alkali?

No. Only bases that dissolve in water are called alkalis.

How can I remember baking soda versus washing soda?

Baking soda is hydrogencarbonate, NaHCO3, while washing soda is sodium carbonate decahydrate, Na2CO3.10H2O.

Why is turmeric important in this chapter?

Turmeric is a natural indicator and a familiar Indian example, so it is often used in school and board questions.

What is the easiest way to write salt answers?

Write the name, formula, preparation, and uses in the same order every time.

Can a neutral solution contain ions?

Yes. Pure water has very small amounts of H+ and OH- ions in equal concentrations, so it is neutral.

What should I revise one day before the exam from this chapter?

Revise indicator colour changes, standard equations, pH uses, and the formulas plus uses of the common salts.

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