Consider the isomers P = [Co(NH3)5Br]SO4 and Q = [Co(NH3)5(SO4)]Br. Which statement is correct?

P gives a white precipitate with BaCl2 solution; Q gives a pale yellow precipitate with AgNO3 solution.

Neither P nor Q gives a precipitate with BaCl2 or AgNO3.

Both P and Q give a white precipitate with BaCl2 solution.

P gives a pale yellow precipitate with AgNO3 solution; Q gives a white precipitate with BaCl2 solution.

JEE Main levelSingle correct optionDifficulty 2 of 3cc018

Consider the isomers P $= [Co (NH X_{3}) X_{5} Br] SO X_{4}$ and Q $= [Co (NH X_{3}) X_{5} (SO X_{4})] Br$ . Which statement is correct?

AP gives a white precipitate with $BaCl X_{2}$ solution; Q gives a pale yellow precipitate with $AgNO X_{3}$ solution.
BNeither P nor Q gives a precipitate with $BaCl X_{2}$ or $AgNO X_{3}$ .
CBoth P and Q give a white precipitate with $BaCl X_{2}$ solution.
DP gives a pale yellow precipitate with $AgNO X_{3}$ solution; Q gives a white precipitate with $BaCl X_{2}$ solution.

These are ionisation isomers. In P, sulfate is free and bromide is bound, so only

BaSO X_{4}

(white) forms. In Q, bromide is free and sulfate is bound, so only

AgBr

(pale yellow) forms with

AgNO X_{3}