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nika2105 [10]
3 years ago
5

Which process is a physical change?

Chemistry
2 answers:
kipiarov [429]3 years ago
6 0

Water boiling is a physical change. Physical changes do not change the substance's makeup; boiling, melting, and other changes in matter are physical because they do not alter the substance, while the other choices do change the chemical makeup of the substance.

Semenov [28]3 years ago
3 0
C is the correct answer
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<u>Explanation:</u>

Bromothymol blue, Bromocresol green and Thymol blue are the indicators which change their color according to the change in pH of the solution.

The pH range and color change of these indicators are:

  1. Bromothymol Blue: The pH range for this indicator is 6.0 to 7.5 and color change is from yellow to blue. It appears yellow below pH 6.0 and blue above pH 7.5
  2. Bromocresol green: The pH range for this indicator is 3.5 to 6.0 and color change is from yellow to blue. It appears yellow below pH 3.5 and blue above pH 6.0
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As, the highest pH of all the indicators is 9.6, so every indicator will appear blue above pH 9.6.

Hence, the correct answer is Option 4.

3 0
3 years ago
Read 2 more answers
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