Acid bases and salts
1.Two solutions A and B have pH values of 5 and 8 respectively. Which solution will be basic in nature? Solution B 2. If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done? [NCERT Exemplar] The hand should be washed immediately with plenty of water and a paste of sodium hydrogencarbonate (a base) must be applied to neutralise the acid. 3. If someone is suffering from the problem of acidity after overeating; which of the following would you suggest as a remedy? Lemon juice, Baking soda solution or Vinegar. Baking soda solution because it is basic in nature and hence neutralises the excess acid present in the stomach. 4. Arrange the following in the increasing order of acidic strength. Acetic acid, water and hydrochloric acid Water < acetic acid < hydrochloric acid. 5. Why does tooth decay start when the pH of mouth is lower than 5.5? Tooth starts decaying when the pH of our mouth is lower than 5.5. This is because bel...