FeS+HCl→A+B(g)
Gas B is passed into aq. solution of C to form A. Select correct statement(s) based on the above.
A
Color of C changes from yellow to very light green
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B
Gas B turns lead acetate paper black
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C
A forms deep blue color withK3[Fe(CN)6]
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D
All the above are true
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Solution
The correct option is DAll the above are true FeS+2HCl→FeCl2+H2S(g)(A)(B)(a)2FeCl3+H2S→2FeCl2+2HCl+SYellowgreen(b)(CH3COO)2Pb+H2S→CH3COOH+PbS(B)Black(c)FeCl2+K3[Fe(CN)6]→Fe3[Fe(CN)6]2blue