OLYMPIAD Class 7 Science Free Doubts and Solutions
Olympiad - VII - Science - Acids, Bases and Salts
what is the substance present in china rose so that it is an acid base indicator. name the substance in it ? can we use that substance in other materials to make them also an acid base indicator?
Browse free questions and answers Chapters
- 1 Acids, Bases and Salts
- 2 Fibre to Fabric
- 3 Heat
- 4 Weather, Climate and Adaptations of Animals to Climate
- 5 Winds, Storms and Cyclones
- 6 Respiration in Organisms
- 7 Reproduction in Plants
- 8 Motion and Time
- 9 Light
- 10 Physical and Chemical Changes
- 11 Transportation in Plants and Animals
- 12 Nutrition in Plants and Animals
- 13 Natural Resources and their Conservation
- 14 Electric Current
- 15 Logical Reasoning