• A. $KOH$
• B. $Ba{\left(OH\right)}_2$
• C. $Pb{\left(OH\right)}_2$
• D. $LiOH$

Answer: Option C

Explanation:

• A. $HCI$ এবং $ZnC{l}_2$
• B. $Br$ এবং $FeB{r}_3$
• C. $H_{2}S{O}_4$ এবং $HN{O}_3$
• D. $NaOH$ এবং $C{l}_2$

Answer: Option C

Explanation:

• A. $-CN$
• B. $-OC{H}_3$
• C. $-CHO$
• D. $-N{O}_2$

Answer: Option B

Explanation:

• A. $C{F}_{3}COOH$
• B. $CC{I}_{3}COOH$
• C. $CB{r}_{3}COOH$
• D. $C{I}_{3}COOH$

Answer: Option A

Explanation:

• A. $Z{n}^{2+}/Zn$
• B. $Zn/Z{n}^{2+}$
• C. $C{u}^2/Cu$
• D. $H^{+}/H_2$

Answer: Option A

Explanation:

• A. $C{F}_{3}CI$
• B. $CC{I}_{3}F$
• C. $CC{I}_2{F}_2$
• D. $F_{2}CIC-CCI{F}_2$

Answer: Option C

Explanation:

• A. $H{e}_2$
• B. $F_2$
• C. $N_2$
• D. $HF$

Answer: Option A

Explanation:

• A. $N{a}_{2}C{O}_{3. }10 H_{2}O$
• B. $N{a}_{2}C{O}_{3. }NaOH$
• C. $N{a}_{2}C{O}_3$
• D. $NaOH.CaO$

Answer: Option A

Explanation:

• A. ${\left(C{H}_3\right)}_{2}NH$
• B. $C{H}_{3}N{H}_2$
• C. $C_6{H}_{5}N{H}_2$
• D. ${\left(C{H}_3\right)}_{3}N$

Answer: Option D

Explanation:

• A. $NaOH$
• B. $HCI$
• C. $KMn{O}_4$
• D. $K_{2}C{r}_2{O}_7$

Answer: Option D

Explanation:

• A. $S{O}_2$
• B. $N_{2}O$
• C. $O_2$
• D. $N{O}_2$

Answer: Option C

Explanation:

• A. $C{H}_{3}COOH+C{H}_{3}COONa$
• B. $NaOH+N{a}_{2}C{O}_3$
• C. $C{H}_{3}COOH+C{H}_{3}COON{H}_4$
• D. $KOH+N{a}_{2}C{O}_3$

Answer: Option A

Explanation:

• A. $s{p}^3$
• B. $sp$
• C. $s{p}^{3}d$
• D. $s{p}^2$

Answer: Option D

Explanation:

• A. $6. 02 x {10}^{24}$
• B. $3. 01 \times {10}^{24}$
• C. $6. 02 \times {10}^{22}$
• D. $6. 01 \times {10}^{23}$

Answer: Option A

Explanation:

• A. $O_2$
• B. $C{O}_2$
• C. $CO$
• D. $N_2$

Answer: Option B

Explanation: