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#3493 Bangladesh Studies General Level 20443

<p>নিম্নের কোন বিক্রিয়াটি প্রশমন এনথালপি, ∆H<sub>neutr</sub> প্রকাশ করে ?</p>

  1. A <p>2HCl (aq) + Ca (OH)<sub>2</sub> (aq) → CaCl<sub>2</sub> (aq) + 2H<sub>2</sub>O (l)</p>
  2. B <p>H<sub>2</sub>SO<sub>4</sub> (aq) + 2NH<sub>3</sub> (aq) → (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub> (aq)</p>
  3. C <p>H<sub>2</sub>SO<sub>4</sub> (aq) + Ca(OH)<sub>2</sub> (aq) → CaSO<sub>4</sub> (aq) + 2H<sub>2</sub>O (l)</p>
  4. D <p>HCl (aq) + ½ Ca(OH)<sub>2</sub> (aq) → ½ CaCl<sub>2</sub> (aq) + 2H<sub>2</sub>O (l)</p>
Answer: D - <p>HCl (aq) + ½ Ca(OH)<sub>2</sub> (aq) → ½ CaCl<sub>2</sub> (aq) + 2H<sub>2</sub>O (l)</p>

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