If the approximate $pH$ of a solution is $7,$ what will be the colour of $pH$ paper when dipped into that solution?

What range of $pH$ is considered perfect for a fertile land?

What is the $pH$ value of a basic aqueous solution?

Which of the following statements is correct about an aqueous solution of an acid and of a base?
$(i)$ Higher the $pH$,stronger the acid
$(ii)$ Higher the $pH$,weaker the acid
$(iii)$ Lower the $pH$,stronger the base
$(iv)$ Lower the $pH$,weaker the base

Write true or false for the following statement:
Higher is the hydronium ion concentration,higher is the $pH$ value.

If the $pH$ of the aqueous solutions $A, B, C$ and $D$ are $1.9, 2.5, 2.1$ and $3.0$ respectively,then what will be the order of acidity?