What volume of HNO3. (sp. gravity 1.05 g mL-1 containing 12.6 (w/W) of HNO3) that reduce into NO is required to oxidise iron 1g FeSO4.7H2O in acid medium is:
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a
70 mL
b
0.57 mL
c
80 mL
d
0.65 mL
answer is B.
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Detailed Solution
Let volume of HNO3 is V thenVNHNO3=WEFeSO4.7H2O V×1.05×12.6100×363=1278×1V=0.57mL