• A.
• B.
• C.
• D.

Answer: Option C

Explanation:

• A. $\frac{14}{6}C$ এবং $\frac{16}{8}O$
• B. $\frac{32}{14}Si$

Answer: Option A

Explanation:

• A. $P{b}_3{0}_4$
• B. $Mn{O}_2$
• C. $K{O}_2$
• D. $N{a}_2{O}_2$

Answer: Option C

Explanation:

• A. $S^{-1}$
• B. $L mo{l}^{-1}{S}^{-1}$
• C. $mol L^{-1}{S}^{-1}$
• D. $mol S^{-1}$

Answer: Option C

Explanation:

• A. $5.02\times {10}^{-22}$টি
• B. $5.02\times {10}^{22}$টি
• C. $5.02\times {10}^{23}$টি
• D. $5.02\times {10}^{24}$টি

Answer: Option B

Explanation:

• A. $\frac{14}{6}C$ এবং $\frac{16}{8}O$
• B. $\frac{32}{14}Si$

Answer: Option A

Explanation:

• A. $\frac{14}{6}C$ এবং $\frac{16}{8}O$
• B. $\frac{32}{14}Si$ এবং $\frac{30}{14}Si$
• C. $\frac{30}{15}P$ এবং $\frac{32}{15}S$
• D. $\frac{204}{82}pb$ এবং $\frac{204}{80}H g$

Answer: Option A

Explanation:

• A. $C{H}_{2}COOH\left(aq\right)+NaOH\left(aq\right)\to C{H}_{3}COONa\left(aq\right)+H_{2}O\left(l\right)$
• B. $C{H}_{3}COOH\left(aq\right)+N{H}_{4}OH\left(aq\right)\to N{H}_{4}Cl\left(aq\right)+H_{2}O\left(l\right)$
• C. $HCl\left(aq\right)+N{H}_{4}OH\left(aq\right)\to N{H}_4\left(aq\right)+H_{2}O\left(I\right)$
• D. $HCl\left(aq\right)+NaOH\left(aq\right)\to NaCl\left(aq\right)+H_{2}O\left(1\right)$

Answer: Option B

Explanation:

• A. $C{O}_2$
• B. $CFC$
• C. $C{H}_4$
• D. $O_3$

Answer: Option A

Explanation:

• A. $C{H}_{3}OH$
• B. $C{H}_{3}CHO$
• C. $C{H}_{2}C{H}_{2}OH$
• D. $C{H}_{3}COC{H}_3$

Answer: Option A

Explanation:

• A. $C_2{H}_{2}CHBrCl$
• B. $CICH-CHCI$
• C. $C{H}_{2}C{H}_2$
• D. $C{H}_{3}CH\left(OH\right)COOH$

Answer: Option B

Explanation:

• A. $-CHO$
• B. $-COOH$
• C. $-N{O}_2$
• D. $-N{H}_4$

Answer: Option D

Explanation:

• A. $pH=p{K}_a$
• B. $pH>P{K}_a$
• C. $pH<p{K}_a$
• D. $pH\ge P{K}_a$

Answer: Option A

Explanation:

• A. $C{F}_{2}C{l}_2$
• B. $CHC{l}_3$
• C. $CCI{F}_{2}CCI{F}_2$
• D. $CC{I}_{2}FCC{I}_{2}F$

Answer: Option A

Explanation:

• A. $BeC{l}_2$
• B. $LiCl$
• C. $MgC{l}_2$
• D. $NaCl$

Answer: Option A

Explanation: