Acids, Bases and Salts

How this worksheet helps your child

• Builds confidence in core Science concepts taught in Class 7 through repeated, varied practice.
• Aligned to CBSE and NCERT — questions mirror the pattern children see in school tests and unit assessments.
• Comes with an answer key so parents and students can self-check in minutes, without needing a teacher.
• Pitched at medium level — use it for daily homework, weekend revision or quick exam warm-ups.

About this worksheet

Explore the fundamental world of acids, bases, and salts with our engaging practice worksheet designed specifically for Class 7 Science students following the CBSE curriculum. This resource is perfect for reinforcing key concepts like identifying common acids and bases, understanding the fascinating litmus test, and grasping the principle of neutralisation. Mastering these topics forms a crucial foundation for higher-level chemistry, helping children understand the properties of various substances they encounter daily, from the sour taste of lemon to the slippery feel of soap. This worksheet is an ideal tool for students who have been introduced to these concepts in their NCERT textbooks and are now ready to apply their knowledge through focused practice. It's also great for teachers seeking supplementary materials to consolidate learning or for parents wanting to support their child's science education at home with reliable, curriculum-aligned content. Prepare your child to confidently tackle questions on indicators and chemical reactions related to acids, bases, and salts.

What your child will learn

• Identify common acidic and basic substances found in daily life.
• Practice using litmus paper to determine if a substance is acidic or basic.
• Understand the phenomenon of neutralisation.
• Recognise the importance of indicators in distinguishing acids and bases.
• Apply knowledge of acids and bases to solve application-based problems.

Understanding the concept

Acids, bases, and salts are three fundamental types of chemical compounds that play a significant role in our daily lives and in the natural world. Acids are substances that often taste sour and can turn blue litmus paper red. Examples include lemon juice, vinegar, and the acid in our stomach that helps digestion. Bases, on the other hand, usually taste bitter and feel soapy or slippery to the touch. They turn red litmus paper blue. Common bases include baking soda, soap, and antacids. To tell the difference between an acid and a base, we use special substances called indicators. Litmus is a very common natural indicator. When an acid and a base react with each other, they cancel out each other's properties in a process called neutralisation. This reaction typically produces water and a new substance called a salt. For instance, when hydrochloric acid (an acid) reacts with sodium hydroxide (a base), they form sodium chloride (common table salt) and water. Understanding these concepts helps us comprehend everything from why certain foods taste the way they do to how medicines like antacids work to relieve indigestion.

Tips for parents & teachers

• Encourage your child to read through the definitions of acids, bases, and neutralisation before attempting the practice questions.
• Discuss real-life examples of acids and bases around the house to make the learning more relatable.
• If possible, demonstrate a simple litmus test using household items like lemon juice and soap water.
• Review any incorrect answers together to understand the concepts better rather than just memorising the correct response.
• Use this worksheet as a revision tool before tests or as a way to identify areas that need more practice.

Topics covered

How to use this worksheet at home

Open the print view and use your browser's Print dialog to print on regular A4 paper or save as a PDF. Hand the printed sheet to your child (Class 7) and set a relaxed time limit — 15 to 25 minutes works for most Science worksheets. When they're done, open the "With answer key" view and let them self-mark question by question. Re-print as many times as you need; the file never expires and there's no download limit.

Frequently asked questions

Is this Science worksheet really free?

Yes — every workbook on WorkbookWala is 100% free to download and print. No login, no email, no paywall. We're free for students, parents and teachers.

Is it aligned to the CBSE / NCERT syllabus?

Yes. All Class 7 worksheets are built around the CBSE and NCERT pattern so they map cleanly to what your child is studying in school.

Can I print this worksheet at home?

Yes. Click "Open print view" and use your browser's Print dialog to print on standard A4 paper, or save it as a PDF for later. The layout is designed to fit cleanly without scaling.

Does it include an answer key?

Yes — click "With answer key" to print a version with answers included, so parents and students can self-mark in minutes.