NEET Chemistry (general) MCQ Question
Which of the following combinations correctly identifies the observations and inferences related to the testing of ions in salts?
A white precipitate forms with barium chloride; indicates presence of sulphite ion. Heating the residue gives a yellow color, indicating zinc ion.
Sulphur dioxide gas is produced when sulphite reacts with dilute sulphuric acid; indicates presence of sulphide ion. A white residue indicates copper ion.
A purple complex forms with sodium nitroprusside; indicates presence of sulphide ion. Heating produces a white residue, indicating sodium ion.
A green color appears on potassium dichromate paper; indicates the presence of sulphite ion. A blue color indicates the presence of copper ion.
Correct Answer
Detailed Explanation
According to the NCERT context, the formation of a white precipitate with barium chloride confirms the presence of sulphite ion, and heating the residue yielding a yellow color indicates zinc ion. The other options mix incorrect observations and inferences.
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