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Paragraph : Test (Q). A compound ' X ' was fused with Na metal and the extract gave a white precipitate with AgNO ₃ . The Lassaigne's extract gave red colouration with neutral FeCl ₃ . Test R While compound ' Y ' when fused with Na metal and subsequent analysis on its Lassaigne's extract did not give any characteristic test. Test S While compound Y on fusion with fusion mixture (sodium carbonate + potassium nitrate)

Options

  1. Awill contain halogens
  2. Bmay contain halogens
  3. Cmay contain only sulphur
  4. Dwill contain nitrogen

Correct answer

B. may contain halogens

Step-by-step solution

Choice (B) is correct because we cannot be definite about halogens, i.e., choice (A) is incorrect because we have not eliminated the presence of CN , for even AgCN is white precipitate hence choice (C) and (D) are incorrect.

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