Concepts And Types Of Acids And Bases Quiz

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  • 1/10 Questions

    If you were to drop some phenolphthalein into a base, what color would it turn?

    • Red
    • Yellow
    • Clear
    • Purple-Pink
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About This Quiz

Acids, bases and salts are three main categories of chemical compounds. They have certain definite properties which distinguish one class from the other.
The sour taste of many fruits and vegetables, lemon for instance, is due to various types of acids present in them. The digestive fluids of most animals and humans also contain acids. The word 'acid' is derived from a Latin word, which means "sour". There are a lot of sun facts about acids and salts, how good are you?

Concepts And Types Of Acids And Bases Quiz - Quiz

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  • 2. 
    Now on to universal indicator. What color would this turn in a very strong acid? - ProProfs

    Now on to universal indicator. What color would this turn in a very strong acid?

    • Purple

    • Yellow

    • Red

    • Green

    Correct Answer
    A. Red
    Explanation
    Universal indicator is a pH indicator that changes color depending on the acidity or alkalinity of a solution. In a very strong acid, the pH level would be extremely low, indicating a high acidity. Universal indicator typically turns red in highly acidic solutions, indicating a pH below 4. Therefore, the correct answer is red.

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  • 3. 
    If you dip a piece of red litmus paper into an acid, what color will it turn? - ProProfs

    If you dip a piece of red litmus paper into an acid, what color will it turn?

    • Purple

    • Blue

    • None, it will stay red

    • Yellow

    Correct Answer
    A. None, it will stay red
    Explanation
    When red litmus paper is dipped into an acid, it will stay red. Litmus paper is used as an indicator to determine whether a substance is an acid or a base. Red litmus paper stays red in the presence of an acid, indicating that the substance is acidic. If the litmus paper were to turn blue, it would indicate that the substance is basic. In this case, since the litmus paper stays red, it suggests that the acid does not cause a color change in the paper.

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  • 4. 
    If you were to put some universal indicator in a very strong base, what color would it turn? - ProProfs

    If you were to put some universal indicator in a very strong base, what color would it turn?

    • Purple

    • Yellow

    • Green

    • Red

    Correct Answer
    A. Purple
    Explanation
    When a universal indicator is added to a strong base, it will turn purple. This is because strong bases have a high concentration of hydroxide ions (OH-) which react with the indicator causing it to change color. In the case of a universal indicator, purple is the color that indicates a strong base.

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  • 5. 
    One unconventional indicator is red cabbage juice. What color will this common liquid turn in a base? - ProProfs

    One unconventional indicator is red cabbage juice. What color will this common liquid turn in a base?

    • Purple

    • Yellow

    • Red

    • Blue-Green

    Correct Answer
    A. Blue-Green
    Explanation
    Red cabbage juice is a natural pH indicator that changes color depending on the acidity or alkalinity of a solution. In a base, the red cabbage juice will turn blue-green. This is because bases have a higher pH level, which causes the red cabbage juice to shift towards the blue-green end of the color spectrum. Therefore, the correct answer is blue-green.

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  • 6. 
    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? - ProProfs

    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?

    • Yellow

    • None, it will stay blue

    • Red

    • Purple

    Correct Answer
    A. Red
    Explanation
    When blue litmus paper is dipped into an acid, it will turn red. This is because litmus paper is a pH indicator that changes color in response to the acidity or alkalinity of a substance. Blue litmus paper is typically blue in neutral or basic solutions, but it turns red in the presence of an acid. This color change occurs due to a chemical reaction between the litmus paper and the acid, indicating the acidic nature of the substance being tested.

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  • 7. 
    What color would universal indicator turn if a substance was neutral? - ProProfs

    What color would universal indicator turn if a substance was neutral?

    • Blue

    • Yellow

    • Green

    • Red

    Correct Answer
    A. Green
    Explanation
    Universal indicator is a chemical solution that changes color depending on the pH of a substance. It turns red in acidic solutions, green in neutral solutions, and blue or purple in alkaline solutions. Therefore, if a substance is neutral, the universal indicator would turn green.

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  • 8. 
    Phenolphthalein is another acid-base indicator. Which of these is used as an abbreviation for this indicator? - ProProfs

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

    • PNLPH

    • PHTH

    • PPTN

    • PLTL

    Correct Answer
    A. PHTH
    Explanation
    Phenolphthalein is commonly abbreviated as PHTH.

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  • 9. 
    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? - ProProfs

    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?

    • Orange

    • Green

    • Yellow

    • Red

    Correct Answer
    A. Red
    Explanation
    Goldenrod paper is a type of pH indicator paper that changes color when it comes into contact with acidic or basic substances. In this case, if a piece of goldenrod paper is dipped in a base, it would turn red. Bases have a higher pH level, which causes the paper to undergo a chemical reaction and change color to indicate the presence of a base.

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

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

    • Red

    • Pink

    • Green

    • Yellow

    Correct Answer
    A. Yellow
    Explanation
    Phenol Red is an indicator that is commonly used in laboratories to determine the pH level of a solution. It changes color depending on the acidity or alkalinity of the solution. In an acid, Phenol Red turns yellow. This is because acids have a low pH, and Phenol Red is designed to exhibit a yellow color in the presence of acidic conditions. Therefore, the correct answer is yellow.

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  • Current Version
  • Mar 20, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • May 14, 2019
    Quiz Created by
    Devrv
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