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Quiz about The Truth About Indicators
Quiz about The Truth About Indicators

The Truth About Indicators Trivia Quiz


This is a quiz about indicators: chemicals that tell you whether a substance is an acid or a base. Good Luck!

A multiple-choice quiz by guitar-girl. Estimated time: 3 mins.
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Author
guitar-girl
Time
3 mins
Type
Multiple Choice
Quiz #
291,783
Updated
Dec 03 21
# Qns
10
Difficulty
Average
Avg Score
6 / 10
Plays
2641
- -
Question 1 of 10
1. Litmus is a common indicator used to tell whether something is an acid or a base. If you dip a piece of blue litmus paper into an acid, what color will it turn? Hint


Question 2 of 10
2. If you dip a piece of red litmus paper into an acid, what color will it turn? Hint


Question 3 of 10
3. Phenolphthalein is another acid-base indicator. Which of these is used as an abbreviation for this indicator? Hint


Question 4 of 10
4. If you were to drop some phenolphthalein into a base, what color would it turn? Hint


Question 5 of 10
5. Goldenrod paper comes as little strips, similar to litmus. If you were to dip a piece of goldenrod paper in a base, what color would it turn? Hint


Question 6 of 10
6. Now on to universal indicator. What color would this turn in a very strong acid? Hint


Question 7 of 10
7. What color would universal indicator turn if a substance was neutral? Hint


Question 8 of 10
8. If you were to put some universal indicator in a very strong base, what color would it turn? Hint


Question 9 of 10
9. One unconventional indicator is red cabbage juice. What color will this common liquid turn in a base? Hint


Question 10 of 10
10. An indicator that you wouldn't find at home is Phenol Red. What color does this indicator turn in an acid? Hint



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Quiz Answer Key and Fun Facts
1. Litmus is a common indicator used to tell whether something is an acid or a base. If you dip a piece of blue litmus paper into an acid, what color will it turn?

Answer: Red

Acids are common in our lives: orange juice, sodas, and a lot of things we drink contain acids. But stronger acids can be dangerous, burning skin and corroding metal.
2. If you dip a piece of red litmus paper into an acid, what color will it turn?

Answer: None, it will stay red

Litmus usually comes as little strips of paper similar to pH test strips.
3. Phenolphthalein is another acid-base indicator. Which of these is used as an abbreviation for this indicator?

Answer: PHTH

Phenolphthalein is pronounced fee-nol-THAY-leen.
4. If you were to drop some phenolphthalein into a base, what color would it turn?

Answer: Purple-Pink

Bases are also common in our lives: shampoos, soaps and other cleaning products are all bases. But stronger bases like Drain-O can corrode skin.
5. Goldenrod paper comes as little strips, similar to litmus. If you were to dip a piece of goldenrod paper in a base, what color would it turn?

Answer: Red

You can buy goldenrod paper as full sheets at certain office stores. You can then mix baking soda and water and draw on the paper with cotton swabs dipped in the mixture.
6. Now on to universal indicator. What color would this turn in a very strong acid?

Answer: Red

An example of a very strong acid would be sulfuric acid (battery acid) or hydrochloric acid (stomach acid). They both have a pH of 1.
7. What color would universal indicator turn if a substance was neutral?

Answer: Green

While we say water is neutral, it is actually slightly basic, with a pH of 7.2.
8. If you were to put some universal indicator in a very strong base, what color would it turn?

Answer: Purple

Sodium Hydroxide (Lye) is a very strong base, with a pH of 14.

You should never mix cleaning products, because if one cleaner contains bleach and the other contains ammonia, the bases will react to produce harmful chlorine gas.
9. One unconventional indicator is red cabbage juice. What color will this common liquid turn in a base?

Answer: Blue-Green

Red cabbage juice is exactly what it says: the juice from a red cabbage!
10. An indicator that you wouldn't find at home is Phenol Red. What color does this indicator turn in an acid?

Answer: Yellow

Don't confuse Phenol Red with phenolphthalein! Phenol Red starts out red, while phenolphthalein starts clear.

There are also many other indicators that this quiz didn't cover, such as Methyl Orange.
Source: Author guitar-girl

This quiz was reviewed by FunTrivia editor crisw before going online.
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