• A. $F{e}^{2+}$
• B. $C{u}^{2+}$
• C. $S{c}^{3+}$
• D. $C{r}^{3+}$

Answer: Option C

Explanation:

• A. ${\left(C{H}_3\right)}_{2}C=C{\left(C{H}_3\right)}_2$
• B. ${\left(C{H}_3\right)}_{2}C=C{H}_2$
• C. $C{H}_{3}CH=CHC{H}_{2}C{H}_3$
• D. $H_{2}C=CHC{H}_3$

Answer: Option C

Explanation:

• A. $I_2$
• B. $H_{2}S$
• C. $KMn{O}_{4 }$
• D. $H_2{O}_2$

Answer: Option D

Explanation:

• A. $HN{O}_3$
• B. $HN{O}_2$
• C. Zn + HCl
• D. $CHC{l}_3$

Answer: Option B

Explanation:

• A. $N{O}_{2 }$
• B. $N_2{O}_5$
• C. NO
• D. $C{O}_2$

Answer: Option C

Explanation:

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

Answer: Option D

Explanation:

• A. $1.0 \times {10}^{-12 }$
• B. $1.0 x {10}^{-13 }$
• C. $1.0 x {10}^{-14 }$
• D. $1.0 x {10}^{-15}$

Answer: Option C

Explanation:

• A. $CC{l}_{3}F$
• B. $C{F}_4$
• C. $CHCI{F}_2$
• D. $C{H}_2{F}_{2 }$

Answer: Option A

Explanation: