• A. 74.6
• B. 223.8
• C. 373
• D. 149.2

Answer: Option D

Explanation:

• A. $2.0\times {10}^{-3}$
• B. $2.0\times {10}^{-19}$
• C. $2.0\times {10}^{-2}$
• D. $2.0\times {10}^{-7}$

Answer: Option A

Explanation:

• A. $C{H}_{2}COOH$
• B. $C{H}_2\left(OH\right)C{H}_2\left(OH\right)$
• C. $C{H}_{5}OH$
• D. $C{H}_{3}C{H}_{2}OH$

Answer: Option A

Explanation:

• A. 1
• B. 3
• C. 5
• D. 7

Answer: Option B

Explanation:

• A. 3.4
• B. 10.2
• C. 40.8
• D. 91.8

Answer: Option C

Explanation:

• A. $H_{2}P{O_4}^{-}$
• B. $P{O_4}^{3-}$
• C. $HP{O_3}^{2-}$
• D. $H_{2}P{O_3}^{-}$

Answer: Option B

Explanation:

• A. $H_{3}P{O}_4$
• B. $H_{3}P{O_4}^{-}$
• C. $P{O_4}^{3-}$
• D. $HP{O_4}^{-}$

Answer: Option C

Explanation:

• A. 166.67
• B. 366.67
• C. 66.67
• D. 266.67

Answer: Option D

Explanation:

• A. $1s^{2}2s^{2}2p^{6}3s^{2}3p^6$
• B. $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^6$
• C. $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^5$
• D. $1s^{2}2s^{2}2p^{6}3s^{2}3d^5$

Answer: Option B

Explanation:

• A. 4.52 g
• B. 4.55 kg
• C. 452 g
• D. 455 g

Answer: Option D

Explanation:

• A. $S^{2-}$
• B. $p^3$
• C. $K^{+}$
• D. সবগুলো

Answer: Option D

Explanation:

• A. 6 হতে 3
• B. 7 হতে 3
• C. 6 হতে 5
• D. 7 হতে 6

Answer: Option A

Explanation:

• A. $N{O}^{-}$
• B. ${O_3}^{-}$
• C. $Cl{O}^{-}$
• D. ${N_3}^{-}$

Answer: Option D

Explanation:

• A. $C{H}_{3}CHO$
• B. $C{H}_{3}COO{M}_{g}X$
• C. $C{H}_{4}COO{M}_{g}X$
• D. ${\left(C{H}_{4}COO\right)}_2{M}_g$

Answer: Option B

Explanation:

• A. সাম্যাবস্থা বাম দিকে সরে যাবে
• B. সাম্যাবস্থা ডান দিকে সরে যাবে
• C. সাম্যাবস্থা অপরিবর্তিত থাকবে
• D. সাম্যাবস্থা বিঘ্নিত হবে

Answer: Option B

Explanation: