Subject Experts Solutions for Chapter: Physical and Chemical Changes, Exercise 2: Chapter Review

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Subject Experts Science Solutions for Exercise - Subject Experts Solutions for Chapter: Physical and Chemical Changes, Exercise 2: Chapter Review

Attempt the practice questions on Chapter 6: Physical and Chemical Changes, Exercise 2: Chapter Review with hints and solutions to strengthen your understanding. Galaxy Science in Everyday Life solutions are prepared by Experienced Embibe Experts.

Questions from Subject Experts Solutions for Chapter: Physical and Chemical Changes, Exercise 2: Chapter Review with Hints & Solutions

EASY
7th CBSE
IMPORTANT

What are the methods to prevent rusting of iron articles?

HARD
7th CBSE
IMPORTANT

Why does soaking cut vegetables in water prevent their browning?

HARD
7th CBSE
IMPORTANT

Describe physical change with the help of examples.

MEDIUM
7th CBSE
IMPORTANT

What are the indications of a chemical reaction taking place?

MEDIUM
7th CBSE
IMPORTANT

Explain an activity to show a change in colour during a chemical reaction. 

MEDIUM
7th CBSE
IMPORTANT

When chuna (lime) is added to water, heat is evolved. It is a chemical reaction. Explain.

MEDIUM
7th CBSE
IMPORTANT

Write the word equation and symbolic chemical equations for the burning of coal.

MEDIUM
7th CBSE
IMPORTANT

Why is rusting considered to be a chemical change?