রসায়ন • সপ্তম অধ্যায়: 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

   Na2SO4(aq)+BaCl2(aq)→BaSO4( s)+2NaCl(aq) $begin{array}{l}\mathrm{Na}{2} \mathrm{SO}{4}(\mathrm{aq})+\mathrm{BaCl}{2}(\mathrm{aq}) \rightarrow \mathrm{BaSO}{4}(\mathrm{~s})+$\\$2 \mathrm{NaCl}(\mathrm{aq})$\end{array}

3. গ

   Zn(s)+CuSO4(aq)→ZnSO4(aq)+Cu(s) $begin{array}{l}\mathrm{Zn}(\mathrm{s})+\mathrm{CuSO}{4}(\mathrm{aq}) \rightarrow \mathrm{ZnSO}{4}(\mathrm{aq})+$\\$\mathrm{Cu}(\mathrm{s})$\end{array}

4. ঘ

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