Exploring Substances Acidic Basic and Neutral Class 7 Questions and Answers Science Chapter 2
Exploring Substances Acidic Basic and Neutral Class 7 Questions and Answers Science Chapter 2 1. A solution turns the red litmus paper to blue. Excess addition of which of the following solution would reverse the change? (i) Lime water (ii) Baking soda (iii) Vinegar (iv) Common salt solution Answer: (iii) Vinegar 2. You are provided with three unknown solutions labelled A, B, and C, but you do not know which of these are acidic, basic, or neutral. Upon adding a few drops of red litmus solution to solution A, it turns blue. When a few drops of turmeric solution are added to solution B, it turns red. Finally, after adding a few drops of red rose extract to solution C, it turns green. Based on the observations, which of the following is the correct sequence for the nature of solutions A, B, and C? (i) Acidic, acidic, and acidic (ii) Neutral, basic, and basic (iii) Basic, basic, and acidic (iv) Basic, basic, and basic Answer: (iv) Basic, basic, and basic 3. Observe and analyse Figs. 2.13...