রসায়ন • রাসায়নিক বিক্রিয়া (Chemical Reactions) • Cumilla Board • কুমিল্লা বোর্ড ২০২৪

রসায়ন প্রশ্ন

1. ক

   $\mathrm{FeCl}_{3}(\mathrm{aq})+\mathrm{H}_{2} \mathrm{~S}(\mathrm{~g}) \rightarrow \mathrm{F}_{2} \mathrm{Cl}_{2}(\mathrm{aq})+\mathrm{S}_{(\mathrm{s})}+\mathrm{HCl}(\mathrm{g})$

2. খ

   $\begin{array}{l}\mathrm{Na}_{2} \mathrm{SO}_{4}(\mathrm{aq})+\mathrm{BaCl}_{2}(\mathrm{aq}) \rightarrow \mathrm{BaSO}_{4}(\mathrm{~s})+ \\ 2 \mathrm{NaCl}(\mathrm{aq})\end{array}$

3. গ

   $\begin{array}{l}\mathrm{Zn}(\mathrm{s})+\mathrm{CuSO}_{4}(\mathrm{aq}) \rightarrow \mathrm{ZnSO}_{4}(\mathrm{aq})+ \\ \mathrm{Cu}(\mathrm{s})\end{array}$

4. ঘ

   $\mathrm{CuO}(\mathrm{s})+\mathrm{CO}(\mathrm{g}) \rightarrow \mathrm{Cu}(\mathrm{s})+\mathrm{CO}_{2}(\mathrm{~g})$