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During the detection of acidic radical present in a salt, a student gets a pale yellow precipitate soluble wi th difficulty in NH 4 OH solution when sodium carbonate extract was first acidified with dil. HNO 3 and then AgNO 3 solution was added. This indicates presence of :

1. Br –
2. – 2 3 CO
3. I –
4. Cl –

Correct answer: Br –

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