Which of the following oxides is unlikely to be dissolved in sodium hydroxide?
Correct answer: A. MgO
- A. MgO
- B. SiO2
- C. Al2O3
- D. NO2
Explanation
Magnesium oxide (MgO) is the correct answer as it is an insoluble oxide of an alkaline earth metal, making it unlikely to dissolve in sodium hydroxide due to its high lattice energy. Silicon dioxide, aluminum oxide, and nitrogen dioxide are all oxides that react with sodium hydroxide, disqualifying them as potential answers.
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About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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