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Question
A sample of soil is mixed with water and allowed to settle. The clear supernatant solution turns the pH paper yellowish-orange. Which of the following would change the colour of this pH paper to greenish-blue?
A sample of soil is mixed with water and allowed to settle. The clear supernatant solution turns the pH paper yellowish-orange. Which of the following would change the colour of this pH paper to greenish-blue?
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Solution
The correct option is D Antacid
On the pH scale, when the pH of solution decreases from 7 to 1, the colour of pH paper changes from yellow to orange to finally red.
When the pH of solution increases from 7 to 14 the colour of pH paper changes from green to blue.
The supernatant solution turns the pH paper yellowish-orange which indicates that the solution is acidic or having pH lower than 7.
The solution can only turn the pH paper greenish-blue if it is alkaline in nature that can be made by adding antacid (base) to it.
On the pH scale, when the pH of solution decreases from 7 to 1, the colour of pH paper changes from yellow to orange to finally red.
When the pH of solution increases from 7 to 14 the colour of pH paper changes from green to blue.
The supernatant solution turns the pH paper yellowish-orange which indicates that the solution is acidic or having pH lower than 7.
The solution can only turn the pH paper greenish-blue if it is alkaline in nature that can be made by adding antacid (base) to it.
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