Vaishali Gupta, Shalini Bajaj and, Supriya D.Sheshadri Solutions for Exercise 3: Let's Answer
Author:Vaishali Gupta, Shalini Bajaj & Supriya D.Sheshadri
Vaishali Gupta Science Solutions for Exercise - Vaishali Gupta, Shalini Bajaj and, Supriya D.Sheshadri Solutions for Exercise 3: Let's Answer
Attempt the free practice questions from Exercise 3: Let's Answer with hints and solutions to strengthen your understanding. Science Horizons solutions are prepared by Experienced Embibe Experts.
Questions from Vaishali Gupta, Shalini Bajaj and, Supriya D.Sheshadri Solutions for Exercise 3: Let's Answer with Hints & Solutions
EASY
7th CBSE
IMPORTANT
The chemical formula of sulphuric acid is _____.
:
:
:
Enter your correct answer as or .

EASY
7th CBSE
IMPORTANT
A new substance is formed in a _____ (physical / chemical) change.

EASY
7th CBSE
IMPORTANT
Iron reacts with _____ (oxygen / carbon dioxide) in the presence of moisture to form rust.

EASY
7th CBSE
IMPORTANT
_____(Oxygen/Carbon dioxide) is released when vinegar reacts with baking soda.

MEDIUM
7th CBSE
IMPORTANT
Match the following:
Column A | Column B |
1. Common salt | a. Melanin |
2. Rust | b. Calcium hydroxide |
3. Cut fruits | c. Iron oxide |
4. Lime water | d. |
