Chemical Reactions & Neutralisation
How to tell a new substance has formed, and what happens when acid meets alkali.
What this lesson covers
Chemical Reactions & Neutralisation is a 10-part Class 7 Science lesson. Each part makes one point and then hands over to the next, so it can be read in a sitting or picked up again at the part you stopped on. It defines the idea in plain words before using it, works through an example step by step, breaks the topic into its parts and compares them, shows where it is used outside the textbook, names the mistakes that cost marks in an exam, ends with a recap of what to remember.
How it begins
In a chemical reaction, new substances are formed and the change is usually hard to reverse. A physical change (melting, dissolving, breaking) makes no new substance and is usually reversible.
The 10 parts
- Chemical or physical?
- Signs of a chemical reaction
- Acids and alkalis
- Indicators
- Neutralisation
- Neutralisation in real life
- Conservation of mass
- Where marks go
- What to remember
- Watch one worked through
Practise Chemical Reactions & Neutralisation
Everything on QuizByt for Class 7 Science that goes with this lesson: read it first, then test yourself while it is fresh.
🧠 9 quizzes on Chemical Reactions & Neutralisation (6 easy, 2 medium, 1 hard)
Work up from easy to hard: the hard quiz asks the Class 7 exam-style questions on Chemical Reactions & Neutralisation.
🖨️ Printable worksheet
Chemical Reactions & Neutralisation on paper for Class 7, with room to write the working out. Preview the first page free.
🎮 Games for Class 7 Science
Memory and reasoning games at the right level for Class 7. Passing a quiz on Chemical Reactions & Neutralisation earns the credits that open them.
This topic needs a subscription
This lesson is part of a paid plan. Create a free account to start with our free lessons, or subscribe to open every topic.
- 🆓 Free lessons are open on any account
- 📗 Monthly: 5 paid topics a month
- 📘 Yearly: 7 paid topics a month
- ⭐ Premium, every topic, unlimited
- 🧺 Or buy this single topic, the lesson is included