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Freshly prepared solution of sodium nitroprusside is added to the sodium extract. Appearance of a deep violet colour indicates the presence ofA. nitrogenB. sulphurC. both nitrogenn and sulphurD. halogen |
Answer» Correct Answer - B `Na_(2)S+ underset("Sod nitroprusside")(Na_(2)[Fe(CN)_(5)(NO)])to underset("Sod. Thionitroprusside (Violet)")(Na_(4)[Fe(CN)_(5)(NOS)])` |
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