Nessler's reagent is
- A$KHgI_4$
- B$K_2HgI_4 + NH_4OH$
- C$K_2HgI_4 + KOH$
- D$KHgI_4 + NH_4OH$
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View SolutionCompound $X$ is tested and the results are shown in the table. Test Result Aqueous $NaOH$ is added, then heated gently. Gas given off which turns damp red litmus paper blue. Dilute $HCl$ is added. Effervescence, gas given off which turns lime water milky and acidified $K_2Cr_2O_7$ paper green.
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| Test | Result |
| Aqueous $NaOH$ is added, then heated gently. | Gas given off which turns damp red litmus paper blue. |
| Dilute $HCl$ is added. | Effervescence, gas given off which turns lime water milky and acidified $K_2Cr_2O_7$ paper green. |
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