• A. $180°$
• B. $104.5°$
• C. $92.1°$
• D. $109.5°$

Answer: Option C

Explanation:

• A. $H_{2}NCSN{H}_2+H_{2}O$
• B. $FeS+\text{লঘূ} H_{2}S{O}_4$
• C. $FeS{O}_4+\text{লঘূ} H_{2}S{O}_4$
• D. $C{H}_{3}CSN{H}_2+H_{2}O$

Answer: Option D

Explanation:

• A. 0 ppm
• B. 40 ppm
• C. 50 ppm
• D. 30 ppm

Answer: Option C

Explanation:

• A. nickel (Ni)
• B. silver (Ag)
• C. graphite (Gr)
• D. platinum (pt)

Answer: Option C

Explanation:

• A. ক্ষার
• B. দ্রাবক
• C. অনুঘটক
• D. নিউক্লিওফাইল

Answer: Option D

Explanation:

• A. HOOC-COOH
• B. $HO{H}_{2}C-C{H}_{2}OH$
• C. HCHO
• D. OHC-CHO

Answer: Option D

Explanation:

• A. $C_6{H}_{5}Br$
• B. $C_2{H}_{5}N{H}_2$
• C. $C{H}_{3}N{H}_2$
• D. $C_6{H}_{5}N{H}_2$

Answer: Option D

Explanation:

• A. 2
• B. 3
• C. 4
• D. 5

Answer: Option B

Explanation:

• A. 1
• B. 2
• C. 3
• D. 4

Answer: Option D

Explanation:

• A. 2
• B. 3
• C. 4
• D. 6

Answer: Option B

Explanation:

• A. $X<Y$
• B. $Y<Z$
• C. $X<Z$
• D. $Y<X<Z$

Answer: Option D

Explanation:

• A. $HCOOH$
• B. $C{H}_{3}COOH$
• C. $C{H}_{3}CHO$
• D. $C{H}_{3}C{H}_{2}C{H}_{2}COOH$

Answer: Option B

Explanation:

• A. $\frac{3}{4}{R}_H$
• B. $\frac{5}{36}{R}_H$
• C. $\frac{3}{16}{R}_H$
• D. $\frac{9}{144}{R}_H$

Answer: Option B

Explanation:

• A. +5
• B. +4
• C. +3
• D. +2

Answer: Option C

Explanation:

• A. 1, 2, 3-ট্রাইমিথাইল মিথান্যাল
• B. 1, 1- ডাইমিথাইল ইথান্যাল
• C. 2, 2- ডাইমিথাইল প্রোপান্যাল
• D. 1, 2, 3-ট্রাইমিথাইল ইথান্যাল

Answer: Option C

Explanation: