`0.5 M FeSO_4` विलयन के 35 ml को ऑक्सीकृत करने के लिए आवश्यक `0.1 M K_(2)Cr_(2)O_(7)` का आयतन है|

Options

A. 29.2 ml
B. 145 ml
C. 175 ml
D. 58.9 ml

Answer

A

Explanation

`K_(2)Cr_(2)O_(7) + 6FeSO_(4) + 7H_(2)SO_(4) to K_(2)SO_(4) + Cr_(2)(SO_(4))_(3) + 3Fe_(2)(SO_(4))_(3) + 7H_(2)O`
`K_(2)Cr_(2)O_(7)` के लिए, `M = 0.1 M, n_(1) = V_(1)`= ?
`FeSO_(4)` के लिए, `M= 0.5 M, n_(2) = 6, V_(2) = 35 ml`
`(M_(1)V_(1))/n_(1) = (M_(2)n_(2))/n_(2)`
`V_(1) = 29.2 ml`