A solution turns red litmus blue, its pH is likely to be
1
4
5
10
Bases turn red litmus blue and acids turn blue litmus red. Basic solution has a pH value more than 7. Since the solution turns red litmus blue, its pH is likely to be 10.
Give two important uses of washing soda and baking soda.
What is a neutralization reaction? Give two examples.
Plaster of Paris should be stored in a moisture-proof container. Explain why?
A milkman adds a very small amount of baking soda to fresh milk.
(a) Why does he shift the pH of the fresh milk from 6 to slightly alkaline?
(b) Why does this milk take a long time to set as curd?
Fresh milk has a pH of 6. How do you think the pH will change as it turns into curd? Explain your answer.