2. A student observed that the colour of pH paper changes to green when she dipped it in water. She added a few drops of concentrated hydrochloric acid to the water. The colour of pH paper would turn to (a) light red. (b) apple green. (c) dark blue. (d) lemon yellow.
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Answer:
Hydrochloric acid has pH less than 7. If concentrated hydrochloric acid is added to water then it becomes dilute. And according to the pH color chart the correct option is a) light red
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Answer:
The colour of pH paper would turn to (a) light red.
Explanation:
The colour of pH paper would change to light red.
Hydrochloric acid has a pH of less than 7. If condensed hydrochloric acid exists added to water then it becomes diluted.
The pH paper turns red thus it exists recognized as an acid. The pH of the deep red solution lies between 0-6 as it exists as acid and exists highly acidic so it could be 3-4 pH.
Therefore, the correct answer is option (a) light red.
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