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Question

X+H2OY.
Y is used to remove grease stains from woollen clothes. Identify X and Y.

  1. X=HCl,Y=NaOH
  2. X=NH4OH,Y=NH3
  3. X=NH3,Y=NH4OH
  4. None of these

A
X=HCl,Y=NaOH
B
X=NH4OH,Y=NH3
C
X=NH3,Y=NH4OH
D
None of these
Solution
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Ammonia solution is good for removing stains and tarnish and can also repel moths and reduce paint odours. As ammonia reacts with the water, it is dissolved in to produce ammonium ions and hydroxide ions.

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