Which one of the following types of medicines is used for treating indigestion ?
A solution turns red litmus blue, its $pH$ is likely to be
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 ?
Name the sodium compound which is used for softening hard water.
What effect does the concentration of $H^+_{(aq)}$ ions have on the nature of the solution ?