Aqueous solution of Na2CO3 is:
Correct answer: B. Alkaline
- A. Acidic
- B. Alkaline
- C. Both Acidic and Alkaline
- D. Neutral
- E. None of these
Explanation
Sodium carbonate (Na2CO3), commonly known as washing soda, dissociates in water to form sodium ions (Na+) and carbonate ions (CO32-). The carbonate ions react with water to produce hydroxide ions (OH-), making the solution alkaline.Option A is incorrect because an acidic solution would release H+ ions, which Na2CO3 does not. Option C is incorrect because a solution cannot be both acidic and alkaline at the same time. Option D is incorrect because a neutral solution has a pH of 7, which is not the case here. Option E is incorrect as the correct answer is that the solution is alkaline.
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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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