Indicator:
A substance, as litmus, that indicates the presence
or concentration of a certain constituent. a substance often used in a
titration to indicate the point at which the reaction is complete.
Which of the
following is the easiest way to detect an acid or base?
a) use of smell
b) use of water
c) use of indicator
d) use of pH meter
Which of the following property/ies indicators changed when added to an acid or alkali?
a) temperature
b) state
c) colour
d) all of these
Which of the following is most common indicator?
a) phenolphthalein
b) methyl orange
c) litmus
d) methyl blue
Which colour litmus produces in acid?
a)red
b) green
c) blue
d) yellow
Which colour litmus produces in alkali?
a) red
b) green
c)blue
d) yellow
