The nature of an aqueous solution of ammonia (NH3) is:
Correct answer: D. Basic
- A. Amphoteric
- B. Neutral
- C. Acidic
- D. Basic
Explanation
The nature of an aqueous solution of ammonia (NH3) is basic. This is because ammonia can accept a proton from water, forming ammonium (NH4+) and hydroxide ions (OH-). The presence of hydroxide ions increases the pH, making the solution basic. Option A, Amphoteric, is incorrect because ammonia does not act as both an acid and a base in this context. Option B, Neutral, is incorrect because the solution's pH is not neutral. Option C, Acidic, is incorrect because ammonia does not donate protons to decrease the pH.
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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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