Pick out incorrect statements

Options

A. The volume of 0.1M `FeC_(2)O_(4)` solution required to reduce 200 ml of 0.6 M `K_(2)Cr_(2)O_(7)` in acidic medium is 2400 ml
B. The volume of 0.1M `Ca(OH)_(2)` required to neutralise 0.2 `MH_(3)PO_(3)` solution of volume `0.25dm^(3)` is 500 ml
C. Equivalent weight of sulphate ion is 49
D. Molality is influenced by change in temperature

Answer

C, D

Explanation

a) No. of meQ of `K_(2)Cr_(2)O_(7)`
`=200xx0.6xx6=720`
No. of mec of `FeC_(2)O_(4)=720`
`720=V` in `mlxx0.1xx3`
`V=(720)/(0.2)=2400ml`
b) `Vxx0.1xx2=250xx0.2xx2,V=500ml`
c) `SO_(4)^(--)` Eqwt = `(96)/(2)=48`
d) Molality is weight factor. Not influenced by temperature.