Topic 3- pH indicators (Paper 1)

Question 1

What colour does litmus solution turn in an acid?

Answer 1

Red

Question 2

What colour does litmus solution turn in water?

Answer 2

Purple

Question 3

What colour does litmus solution turn in an alkali?

Answer 3

Blue

Question 4

What colour does red litmus paper turn in an acid?

Answer 4

Red

Question 5

What colour does red litmus paper turn in water?

Answer 5

Red

Question 6

What colour does red litmus paper turn in an acid?

Answer 6

Red

Question 7

What colour does blue litmus paper turn in an acid?

Answer 7

Red

Question 8

What colour does blue litmus paper turn in water?

Answer 8

Purple

Question 9

What colour does blue litmus paper turn in an alkali?

Answer 9

Blue

Question 10

What colour does phenolphthalein turn in an acid?

Answer 10

Colourless

Question 11

What colour does phenolphthalein turn in water?

Answer 11

Colourless

Question 12

What colour does phenolphthalein turn in an alkali?

Answer 12

Dark pink / purple

Question 13

What colour does methyl orange turn in an acid?

Answer 13

Red

Question 14

What colour does methyl orange turn in water?

Answer 14

Orange

Question 15

What colour does methyl orange turn in an alkali?

Answer 15

Orange

Question 16

What colour does universal indicator turn in an acid?

Answer 16

Red

Question 17

What colour does universal indicator turn in water?

Answer 17

Green

Question 18

What colour does universal indicator turn in an alkali?

Answer 18

Blue / black

Question 19

What colour does litmus solution turn in acid, neutral solutions and alkalis?

Answer 19

Acid- red
Neutral- purple
Alkali- blue

Question 20

What colour does methyl orange turn in acid, neutral solutions and alkalis?

Answer 20

Acid- red
Neutral- yellow
alkali- yellow

Question 21

What colour does phenolphtalein turn in acid, neutral solutions and alkalis?

Answer 21

Acid- colourless
neutral- colourless
alkali- pink