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Compound $X$ is tested and the results are shown in the table.
$\begin{array}{l|l}\hline \text{ Test } & \text{ Result } \\\hline \text{ Aqueous sodium } & \text{ Gas given off which turns }\\\text{ hydroxide is added, }& \text{ damp red litmus paper }\\\text{ then heated gently. }& \text{ blue. }\\\text{ Dilute hydrochioric }& \text{ Effervescence, gas given }\\\text{ acid is added. }& \text{ off which turns lime water }\\& \text{ milky and acidified }\\& \mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \text{ paper green. }\\\hline\end{array}$
Which ions are present in compound $X ?$
Options:
$\begin{array}{l|l}\hline \text{ Test } & \text{ Result } \\\hline \text{ Aqueous sodium } & \text{ Gas given off which turns }\\\text{ hydroxide is added, }& \text{ damp red litmus paper }\\\text{ then heated gently. }& \text{ blue. }\\\text{ Dilute hydrochioric }& \text{ Effervescence, gas given }\\\text{ acid is added. }& \text{ off which turns lime water }\\& \text{ milky and acidified }\\& \mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \text{ paper green. }\\\hline\end{array}$
Which ions are present in compound $X ?$
Solution:
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Verified Answer
The correct answer is:
Ammonium ions and sulphate ions
It is a test for ammonia
(ii) it is a test for $\mathrm{SO}_{4}^{2-}$ ions (Orange)
(ii) it is a test for $\mathrm{SO}_{4}^{2-}$ ions (Orange)
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