Powder P is a mixture containing two of AgCl , AgBr or AgI.
P is shaken with dilute aqueous ammonia. A yellow solid, Q, remains.
The mixture is filtered and Q is washed and dried. The filtrate is collected and treated with aqueous
nitric acid to produce a white precipitate, R, which is filtered off, washed and dried.
$Q{\text{ }}and{\text{ }}R{\text{ }}are{\text{ }}warmed{\text{ }}separately{\text{ }}with{\text{ }}concentrated{\text{ }}sulfuric{\text{ }}acid,{\text{ }}{H_2}S{O_4}.$
Which observations are made?
1 )
A
B
3 )
C
4 )
D
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