Saleha Pervez and Shikha Goel Solutions for Chapter: Acids, Bases and Salts, Exercise 3: CHECK POINT 03

If a solution turns red litmus blue, then what is its range of pH value?

Fresh milk has a pH of $6$. How do you think the pH will change as it turns into curd?

Arrange the following substances in the increasing order of their pH value.

Gastric juice, vinegar, wine, milk, blood, rainwater, urine, toothpaste

Calculate the $\mathrm{pH}$ of an acid with $\left[{\mathrm{H}}^{+}\right]={10}^{-2}$.

If the colour produced by the universal indicator is dark purple, then what can you say about its nature (acid or base)?