Question -
Which of the followings pair is not present in acid rain (if any one acid in the given pair is not present, then that pair is considered to be not present)-
Options:
A .  H2CO3 and H2SO3
B .  HNO3 and H2CO3
C .  H2SO4 and H3PO4
D .  H2SO3 and H3SO4
Answer: Option C : C Acid rain is caused due to reaction of water with gaseous oxides present in atmosphere. As oxides of C, N and S are present in the form of CO2,NOx,SO2andSO3; their corresponding acids are present in acid rain. But H3PO4 is absent.
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