Question

When mercurous nitrate paper is exposed to ammonia gas then black color is produced due to the formation of a)Hg₂NH₂NO₃ + Hg
b)HgNH₂NO₃ + Hg
c)Hg₂NH₃NO₃ + Hg
d)HgNH₃NO₃ + Hg​

Answer 1

When mercurous nitrate paper is exposed to ammonia gas then black color is produced due to the formation of Hg₂NH₂NO₃ + Hg.

The reaction of mercurous nitrate paper with ammonia gas produces the compound mercury amidonitrate and mercury metal.

This mercury amidonitrate contains the mercury I ion (Hg2^+). Since the compound contains mercury I ion, mercury amidonitrate  has the formula; Hg₂NH₂NO₃.

The compounds formed therefore are; Hg₂NH₂NO₃ + Hg

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