Because of its ability to combine with both oxygen and nitrogen aluminium metal is used_____________?
Correct answer: B. To remove air bubbles from molten metal
- A. As nitrometer
- B. To remove air bubbles from molten metal
- C. To produce alloy
- D. As insulator
Explanation
Aluminium has a strong affinity for both oxygen and nitrogen, so it reacts with dissolved gases in molten metal and helps remove air bubbles. Students may choose c because aluminium is widely used in alloys, but that use does not depend specifically on its ability to combine with oxygen and nitrogen.
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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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