How many anions evolve brownish gas when treated with dil. /con. HCl ? `(i) CO_(3)^(2-) " " (ii)SO_(3)^(2-) " " (iii) NO_(2)^(-) " " (iv)Cl^(-)` `(v)

Monjur Alahi

How many anions evolve brownish gas when treated with dil. /con. HCl ?
`(i) CO_(3)^(2-) " " (ii)SO_(3)^(2-) " " (iii) NO_(2)^(-) " " (iv)Cl^(-)`
`(v) Br^(-) " " (vi) NO_(3)^(-) " " (vii) CH_(3)CO O^(-)`


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Salim Ahmed Kawsar

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Correct Answer - 1 (only iii)

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