Acid, Base or Neutral? Nature's Colour Test | Class 7 Science Ch 2 | NCERT Animated Lesson

In this lesson: • Why you must never taste an unknown substance • Litmus: acids turn blue litmus red, bases turn red litmus blue • Sorting kitchen items: amla, tamarind, vinegar, baking soda, lime water, salt • Red rose extract and turmeric (haldi) paper as indicators • Neutralisation: acid + base → salt + water + heat • Why baking soda soothes an ant bite Chapter 2: Exploring Substances: Acidic, Basic, and Neutral