Phosphates are identified by the yellow ...

Phosphates are identified by the yellow precipitate obtained on adding ammonium molybdate solution
Ammonium phosphomolybdate is a yellow compoud.

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In dye test aniline gives orange- red dye but `CH_(3)NH_(2)` gives `CH_(3)OH`
`CH_(3)NH_(2)+HNO_(2)rarrCH_(3)OH+N_(2)uarr +H_(2)O`

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