Table of Contents
This worksheet focuses on one of the most interesting and essential topics for Class 10 – Acids, Bases, and Salts. These substances are part of our everyday lives, and understanding them will not only help you score well in exams but also help you connect science to real-life situations.
What are Acids, Bases, and Salts?
- Acids are substances that taste sour, like lemon juice or vinegar. They release hydrogen ions (H⁺) in water and are commonly used in food, cleaning agents, and even medicines.
- Bases taste bitter and feel slippery, like soap or baking soda. They release hydroxide ions (OH⁻) in water and are widely used in cleaning products, toothpaste, and even in industries.
- Salts are formed when acids and bases react with each other. Common salt, or table salt, is an everyday example, but there are many other salts with important uses in cooking, preservation, and industrial applications.
Why Is This Topic Important?
Understanding acids, bases, and salts will help you:
- Identify their properties: Learn how they react with different substances like metals, carbonates, and indicators.
- Connect theory with real life: Explore how substances like antacids, fertilizers, and even the fizz in soft drinks relate to this topic.
- Score in exams: Questions from this chapter are frequently asked in exams, and mastering it can boost your overall Chemistry score.
What Will You Learn?
In this worksheet, you will:
- Classify substances as acids, bases, or salts.
- Understand key concepts like pH scale, neutralization reactions, and the role of indicators like litmus, phenolphthalein, and methyl orange.
- Solve practical problems related to the preparation and uses of common acids, bases, and salts.
Also Check: CBSE Class 10 Science MCQs Chapter 2 Acids Bases and Salts
Worksheet on Class 10 Acid, Bases & Salts
Section A: Multiple Choice Questions (MCQs)
- Which of the following is a strong acid?
a) Vinegar (acetic acid)
b) Hydrochloric acid
c) Lemon juice (citric acid)
d) Sodium hydroxide - Which of the following is an example of a natural indicator?
a) Phenolphthalein
b) Red cabbage juice
c) Methyl orange
d) Litmus solution - What is the pH of a neutral solution?
a) 0
b) 7
c) 14
d) 10 - Sodium hydroxide reacts with hydrochloric acid to form:
a) Water and salt
b) Hydrogen gas and salt
c) Carbon dioxide and water
d) Salt only - Which of the following salts is used in baking?
a) Sodium chloride
b) Sodium bicarbonate
c) Sodium carbonate
d) Sodium hydroxide
Section B: Fill in the Blanks
- Acids turn blue litmus paper __________.
- Bases are __________ to the touch and taste __________.
- The chemical formula of baking soda is __________.
- A __________ reaction occurs when an acid reacts with a base to form salt and water.
- __________ acid is commonly found in car batteries.
Section C: Short Answer Questions
- Define the terms acid and base with examples.
- Explain the pH scale. What does a pH value of 3 indicate?
- Write the chemical equation for the reaction between:
a) Hydrochloric acid and sodium hydroxide
b) Acetic acid and sodium bicarbonate - Why is the pH of soil important for agriculture?
- Differentiate between strong and weak acids with examples.
Also Check: Important Questions for CBSE Class 10 Science Chapter 2 – Acids, Bases and Salts
Section D: Long Answer Questions
- What is a salt? Describe its types with examples.
- Explain the preparation of washing soda and its uses.
- Write a detailed note on the role of pH in everyday life, covering at least three examples.
Section E: Activity-Based Questions
- Practical Application:
You are given three solutions labeled X, Y, and Z.- X turns blue litmus paper red.
- Y turns red litmus paper blue.
- Z does not change the color of litmus paper.
Identify the nature of each solution and justify your answer.
- Experiment Setup:
Describe an experiment to test the presence of carbon dioxide when an acid reacts with a metal carbonate. Write the observations and chemical equation for the reaction.
Section F: Assertion and Reasoning Questions
- Assertion (A): Bases are bitter in taste and slippery to touch.
Reason (R): Bases produce hydroxide ions (OH⁻) in aqueous solutions.- a) Both A and R are true, and R is the correct explanation of A.
- b) Both A and R are true, but R is not the correct explanation of A.
- c) A is true, but R is false.
- d) A is false, but R is true.
- Assertion (A): Salts are always neutral.
Reason (R): Salts are formed by the neutralization reaction of an acid and a base.- a) Both A and R are true, and R is the correct explanation of A.
- b) Both A and R are true, but R is not the correct explanation of A.
- c) A is true, but R is false.
- d) A is false, but R is true.
