NEET Chemistry (general) MCQ Question
Which of the following statements about systematic qualitative analysis is correct?
The presence of Mg²⁺ ions is indicated by the formation of a white crystalline precipitate when disodium hydrogen phosphate is added.
All anions can be detected using the same reagents without the need for specific tests.
The solubility product principle states that all salts are soluble in water, making precipitation impossible.
Common ion effect is not relevant in qualitative analysis as it does not influence precipitation.
Correct Answer
Detailed Explanation
Statement A is correct as the formation of magnesium ammonium phosphate indicates the presence of Mg²⁺ ions, as mentioned in the NCERT context. Statements B, C, and D reflect misconceptions about qualitative analysis and the principles that govern precipitation.
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