Consider the following statements which illustrate the anomalous properties of lithium and its diagonal relationship with magnesium:I. The melting point and boiling point of lithium are comparatively high like Mg.II. Lithium is much harder than the other alkali metals. Magnesium is also a hard metal.III. Lithium reacts with oxygen least readily to form normal oxide whereas other alkali metals form peroxides and super-oxides. Magnesium also forms normal oxide.IV. LiOH like Mg(OH)2 is a weak base. Hydroxides of other alkali metals are strong bases.Which of the above statements is/are correct?
Correct answer: D. I, II, III and IV
- A. I only
- B. II only
- C. III and IV only
- D. I, II, III and IV
Explanation
All four statements in Option D are correct and highlight the anomalous properties of lithium and its diagonal relationship with magnesium. These include high melting and boiling points, hardness, oxide formation, and base characteristics. Options A, B, and C are incorrect as they do not encompass all the accurate statements provided in the question.
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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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