1.

NaBr , used to produce AgBr for use in photography can be self prepared as follows: Fe+Br_(2) to FeBr_(2) ""…(i) FeBr_(2) + Br_(2) to Fe_(3) Br_(8)""…(ii) (not balanced) Fe_(3)Br_(8) + Na_(2)CO_(3) to NaBr+CO_(2) + Fe_(3)O_(4)""...(iii)"" (not balanced) (At mass: Fe=56, Br=80) If yield of (iii) reaction is 90% then mole of CO_(2) formed when 2.06xx10^(3) gm NaBr is formed

Answer»

20
10
9
440

Answer :B


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