• A. $HN{O}_3$
• B. $H_{2}S{O}_4$
• C. $HCI{O}_4$
• D. $HBr{O}_4$

Answer: Option C

Explanation:

• A. $-S-H$
• B. $>C=O$
• C. $-C\equiv N$
• D. $-\frac{o}{c}-OH$

Answer: Option C

Explanation:

• A. $CO$
• B. $S{O}_3$
• C. $N{H}_3$
• D. $C{O}_2$

Answer: Option B

Explanation:

• A. $3500-3700 c{m}^{-1}$
• B. $1260-1410 c{m}^{-1}$
• C. $3200-3400 c{m}^{-1}$
• D. $1040-1150 c{m}^{-1}$

Answer: Option C

Explanation:

• A. $1 ppm = 1 mg d{m}^{-3}$
• B. $1 ppm = 1mg L^{-1}$
• C. $1ppm = 1\mu g m{L}^{-1}$
• D.  সবগুলো সত্য

Answer: Option D

Explanation:

• A. $K^{+}$
• B. $C{a}^{+}$
• C. $C{u}^{2+}$
• D. $M{g}^{2+}$

Answer: Option D

Explanation:

• A. $8-12 mg L^{-1}$
• B. $1-4 mg{L}^{-1}$
• C. $4-8 mg L^{-1}$
• D. $12-16 mg L^{-1}$

Answer: Option C

Explanation:

• A. $(C{H}_3{)}_{2}CH-CON{H}_2$
• B. $(C{H}_3{)}_{2}CH-CON{H}_2$
• C. $C{H}_3-CONH-C{H}_3$
• D. $C{H}_3-C{H}_2-CON{H}_2$

Answer: Option C

Explanation:

• A. $C{H}_2=C{H}_2$
• B. $CH\equiv CH$
• C. $C{H}_3-CH=C{H}_2$
• D. $C{H}_3-C{H}_3$

Answer: Option B

Explanation:

• A. $S{O}_3$
• B. $B{F}_3$
• C. $H^{+}$
• D. সবগুলো

Answer: Option D

Explanation:

• A. $H_{2}P{O}_3$
• B. $H_{3}P{O}_2$
• C. $H_{3}P{O}_4$
• D. $HP{O}_3$

Answer: Option B

Explanation:

• A. $C_6{H}_6$
• B. $C_6{H}_{5}O{H}_3$
• C. $C_6{H}_{5}C{H}_3$
• D. $C_6{H}_{5}CI$

Answer: Option C

Explanation:

• A. $H_2 \left(g\right)+C{I}_2 \left(g\right)\stackrel{hu}{\to }2HCI \left(g\right)$
• B. $H_2 \left(g\right)+ I_2\left(g\right) \stackrel{\nabla }{\to }2HI\left(g\right)$
• C. $2N_2{O}_5\left(g\right)\stackrel{\nabla }{\to }4N{O}_2\left(g\right)+O_2\left(g\right)$
• D. $PC{I}_5\left(g\right)\stackrel{\nabla }{\to }PC{I}_3\left(g\right)+C{I}_2\left(g\right)$

Answer: Option A

Explanation:

• A. $1.66\times {10}^{-24}$
• B. $6.02x{10}^{-23}$
• C. $1.99\times {10}^{-23}$
• D. $1.99\times {10}^{-24}$

Answer: Option A

Explanation:

• A. $H_{2}O$
• B. $HN{O}_3$
• C. $HS{O}_4$
• D. $HC{O}_3$

Answer: Option B

Explanation: