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Q.

Nitrous acid was disproportionated to form water. HNO3 and X. In another reaction, sodium nitrite was reacted with H2SO4  to form NaHSO4.HNO3. water and Y. That are X and Y  respectively ?

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a

NO.N2O3

b

N2O.NO2

c

NO2.N2O5

d

NO.NO 
 

answer is B.

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Detailed Solution

  • Sodium nitrite is reacted with H2SO4​ to form NaHSO4​,HNO3​, water and NO gas (X). Gold is dissolved in aqua-regia to form water, AuCl4−​ and
  • NO gas. Thus, here X is NO and Y is NO. Reactions involved are as follows : Sodium nitriteNaNO2​​+H2​SO4​NaHSO4​+HNO3​+H2O+(X)NO
  • Au(s)+Aqua-regia HNO3​+4HCl​​⇌AuCl4​+(Y)NO​+H2​O
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