Science
The table below has information regarding pH and the nature (acidic/basic) of four different solutions. Which one of the options in the table is correct ?
| Option | Solution | Colour of pH paper | Approximate pH value | Nature of solution |
|---|---|---|---|---|
| (a) | Lemon juice | Orange | 3 | Basic |
| (b) | Milk of magnesia | Blue | 10 | Basic |
| (c) | Gastric juice | Red | 6 | Acidic |
| (d) | Pure water | Yellow | 7 | Neutral |
Acids Bases Salts
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Answer
| Milk of magnesia | Blue | 10 | Basic |
Reason — For lemon juice pH is 3 but colour of pH paper is orange and nature is given as basic which is incorrect. For Gastric juice, pH value of 6 is incorrect. For pure water, colour of pH paper is incorrect. It should be green not yellow.
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