Arsenic oxides are removed by passing through_________________?
Correct answer: A. Ferric hydroxide
- A. Ferric hydroxide
- B. Sodium hydroxide
- C. Calcium hydroxide
- D. Aluminium hydroxide
Explanation
Arsenic oxides can be removed by passing the contaminated material through ferric hydroxide, which adsorbs arsenic species strongly on its hydroxide surface. This adsorption process separates the oxides from the gas or solution. The likely trap is aluminium hydroxide, another hydroxide adsorbent, but ferric hydroxide is the standard reagent for arsenic removal in this context.
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About Periodic Properties and Trends
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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