When a salt is treated with sodium hydroxide solution it gives gas X. On passing gas X through reagent Y a brown…
p-Block Elements (Class 12) · Class 12 · JEE Main Previous Year Question
When a salt is treated with sodium hydroxide solution it gives gas X. On passing gas X through reagent Y a brown coloured precipitate is formed.
X and Y respectively, are
- a
and
- b✓
and
- c
and
- d
and
and
Step 1: Identify gas X
A salt treated with NaOH solution gives gas X. If the salt is an ammonium salt:
Gas X = (ammonia — pungent smell, turns moist red litmus blue)
Step 2: Identify reagent Y (Nessler's reagent)
Nessler's reagent = in KOH (alkaline solution)
When is passed through Nessler's reagent:
The product (iodide of Millon's base) is a brown precipitate ✓
Step 3: Conclusion
X = , Y = in KOH (Nessler's reagent)
Answer: (b)
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