Which of the following reagent(s) can be used to distinguish between NiI2(en)2Cl2 and NiCl2(en)2I2?

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AgNO3

Pb(NO3)2

Chlorine water

NaNO2/HCl

answer is A.

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Detailed Solution

AgNO3 gives white PPt of AgCl soluble in ammonia but AgI is yellow ppt insoluble in ammonia. PbNO3 gives white PPt of PbCl2 with Cl− but yellow PPt with I−.Chlorine water liberates Iodine from I−which gives violet colour in CCl4 or blue colour with starch but Cl− has no reaction.NaNO2 can liberate I2 from I-in acid medium but cannot liberate Cl2 from Cl-

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