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Answer:

If acid were to fall onto a piece of universal indicator paper, you would expect the paper to turn a color indicating acidity. Universal indicator paper typically changes color based on the pH of the substance it comes into contact with. For example, if a strong acid like hydrochloric acid were to fall onto the paper, it would likely turn the paper red, indicating a low pH. If a weaker acid like vinegar were to fall onto the paper, it might turn the paper a lighter shade of red or orange, indicating a slightly higher pH.

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Answer:

red when it is added to a strong acid

Explanation:

Universal Indicator changes color when mixed with an acid or base. The Universal Indicator Color Guide shows that the Universal Indicator turns red when it is added to a strong acid, it turns purple when it is added to a strong base, and it turns a yellowish-green when it is added to a neutral solution.

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