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Earned Point(s): 0 of 0, (0) What is used to test for chlorine?
Which gas relights a glowing splint?
The results of some experiments with sulfur dioxide are shown. \[ Which results are correct?
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\begin{array}{|c|c|c|}
\hline \text { experiment } & \text { description } & \text { result } \\
\hline 1 & \text { mix with dilute hydrochloric acid } & \text { does not react } \\
\hline 2 & \text { mix with concentrated sodium hydroxide } & \text { a salt forms } \\
\hline 3 & \text { add Universal Indicator } & \begin{array}{c}
\text { Universal Indicator } \\
\text { turns purple }
\end{array} \\
\hline 4 & \begin{array}{c}
\text { add acidified aqueous } \\
\text { potassium manganate(VII) }
\end{array} & \begin{array}{c}
\text { purple solution } \\
\text { turns colourless }
\end{array} \\
\hline
\end{array}
\]
Identifying Gases