• A. $N{a}_{2}C{O}_3$
• B. $CaC{O}_3$
• C. $(N{H}_4{)}_{2}C{O}_3$
• D. $N{a}_{2}HC{O}_3$

Answer: Option A

Explanation:

• A. $HN{O}_3$
• B. $HCL$
• C. ${\mathrm{H}}_2{\mathrm{SO}}_4$
• D. ${\mathrm{H}}_3{\mathrm{PO}}_4$

Answer: Option C

Explanation:

• A. $N{H}_{4}OH$
• B. $C_{u}S{O}_4.5H_{2}O$
• C. $N_{a2}C{O}_3.5H_{2}O$
• D. $N_{a2}C{O}_{3.}10H_{2}O$

Answer: Option D

Explanation:

• A. কার্বন ডাইঅক্সাইড$\left(C{O}_2\right)$
• B. ক্লোরিন$\left(C{I}_2\right)$
• C. নাইট্রিক অক্সাইড$\left(NO\right)$
• D. অক্সিজেন$\left(O_2\right)$

Answer: Option C

Explanation:

• A. $১.০৮\times ১{০}^{২}$কুলম্ব
• B. $৯\times ১{০}^{৬}$কুলম্ব
• C. $১.৫০৬\times ১{০}^{৬}$কুলম্ব
• D. $১.৬\times ১{০}^{-১৯}$কুলম্ব

Answer: Option D

Explanation:

• A. 108V,$3\Omega$
• B. 36V,$2\Omega$
• C. 36V,$6\Omega$
• D. 54V,$3\Omega$

Answer: Option C

Explanation:

• A. $Cao$
• B. $Ca{\left(OH\right)}_2$
• C. $C{H}_3{\left(COO\right)}_{2}Ca$
• D. $Ca{u}_2$

Answer: Option A

Explanation:

• A. 1m
• B. $\frac{1}{2}m$m
• C. $\frac{1}{12}m$m
• D. 18m

Answer: Option C

Explanation:

• A. $\mathrm{\beta }$
• B. $I_e$
• C. $I_E$
• D. R

Answer: Option A

Explanation:

• A. Fe
• B. $C{l}_2$
• C. $B{r}_2$
• D. $I_2$

Answer: Option C

Explanation:

• A. $Ba{\left(OH\right)}_2$
• B. $Al{\left(OH\right)}_3$
• C. $C_2{H}_{5}OH$
• D. $C_6{H}_{5}OH$

Answer: Option A

Explanation:

• A. ফেস কারেন্টের অর্ধেক
• B. ফেস কারেন্টের$\frac{1}{\sqrt{3}}$ভাগ
• C. ফেস কারেন্টের$\sqrt{3}$গুন
• D. ফেস কারেন্টের সমান

Answer: Option D

Explanation:

• A. $C{H}_4$
• B. $C{H}_{3}Cl$
• C. NaCl
• D. $PC{l}_3$

Answer: Option C

Explanation:

• A. $C{H}_4$
• B. $C_2{H}_4$
• C. $C_2{H}_2$
• D. $C_6{H}_6$

Answer: Option A

Explanation:

• A. $40kgm{s}^{-1}$
• B. $100kgm{s}^{-1}$
• C. $4kgm{s}^{-1}$
• D. $400kgm{s}^{-1}$

Answer: Option D

Explanation: