question_answer

  The pH of soil A is 7.5 while that of soil B is 4.5. Which of the two soils should be treated with powdered chalk to adjust its pH and why?

Answer:

                  Acidic nature of a substance is due to the formation of H+(aq) ions in solution. Hydrogen ions are produced in the presence of water. The separation of H+ ions from acid like HCl molecule cannot occur in the absence of water. So, acids do not show acidic behaviour in the absence of water.