Five solutions $A,\,B,\,C,\,D$ and $E$ when tested with universal indicator showed $pH$ as $4,\,1,\,11,\,7$ and $9$, respectively. Which solution is
$(a)$ neutral ?
$(b)$ strongly alkaline ?
$(c)$ strongly acidic ?
$(d)$ weakly acidic ?
$(e)$ weakly alkaline ?
Arrange the $pH$ in increasing order of hydrogen-ion concentration.
$(a)$ Neutral $\rightarrow$ Solution $D$ with $pH\, 7$
$(b)$ Strongly alkaline $\rightarrow$ Solution $C$ with $pH\, 11$
$(c)$ Strongly acidic $\rightarrow$ Solution $B$ with $pH \,1$
$(d)$ Weakly acidic $\rightarrow$ Solution $A$ with $pH \,4$
$(e)$ Weakly alkaline $\rightarrow$ Solution $E$ with $pH \,9$
The $pH$ can be arranged in the increasing order of the concentration of hydrogen ions as:
$11 < 9 < 7 < 4 < 1$
Why does an aqueous solution of an acid conduct electricity?
A solution turns red litmus blue, its $pH$ is likely to be
Compounds such as alcohols and glucose also contain hydrogen but are not categorised as acids. Describe an Activity to prove it.
What is a neutralisation reaction? Give two examples.
You have been provided with three test tubes. One of them contains distilled water and the other two contaln an acidic solution and a basic solution, respectlvely. If you are glven only red litmus paper. how will you identify the contents of each test tube ?