WorksheetsAP Chemistry Indicators
Total questions: 27
Worksheet time: 14mins
Litmus paper is an indicator which turns red for alkalis.
True
false
Alkalis will turn litmus paper __________, while acids will turn litmus paper __________.
blue.....red
red.....blue
pink.........colourless
colourless..........pink
An indicator will ______________ when it is in contact with an acid or alkali
Bubble
Form a new substance
Change color
Stay the same color
What color is litmus paper in the presence of an acid?
Red
Blue
Examine the results (color change) of the Universal Indicator paper shown in the picture. What type of substance was tested?
an acid
an alkali
a neutral substance
none of the above
According to the image, the substance tested is .....
acidic
neutral
strongly acidic
alkaline
According to the image, the substance tested is ...
acidic
alkaline
neutral
strongly acidic
One benefit of Universal Indicator paper is that it...
tells you the pH of a substance
only tells you if a substance is an acid or a base
is very accurate
is expensive
One benefit of litmus paper is that it...
tells you the pH of a substance
is inexpensive
connects to a computer
can be made with materials you have at home
One benefit of Red Cabbage Juice Indicator is that it...
tells you the exact pH
is very accurate
is very expensive
can be made from materials you have at home
One drawback of Universal indicator paper is that it
only tells you if a substance is an acid or a base
is very expensive
has to be connected to a computer
is not very accurate
One drawback of litmus paper is that it
only tells you if a substance is an acid or a base
is very expensive
is messy
has to be connected to a computer
One drawback of a pH meter is that it
Is very expensive
is not very accurate
only tells you if a substance is an acid or a base
is messy
What is the colour of methyl orange in acid ?
red
yellow
orange
colourless
What is the colour of phenolphthalein in acid?
red
yellow
orange
colourless
What is the colour of phenolphthalein in alkali ?
pink
blue
red
colourless
What is the colour of methyl orange in alkali?
pink
blue
yellow
colourless
What is the colour of methyl orange in a neutral solution?
pink
orange
yellow
colourless
What is the colour of litmus in a neutral solution?
pink
orange
yellow
purple
What is the colour of phenolphthalein in a neutral solution?
colourless
orange
yellow
purple
