• A. $C{S}_2$
• B. $HCHO$
• C. $Ca{C}_2$
• D. $HC{O}_{2}H$

Answer: Option C

Explanation:

• A. $2Cu{\left(N{O}_3\right)}_2\to 2CuO+4N{O}_2$
• B. $2Na+C{1}_2\to 2NaC1$
• C. $N{a}_{2}S{O}_3+2HC1\to 2NaC1$
• D. $Mg+H_{2}S{O}_4+\to MgS{O}_4$

Answer: Option C

Explanation:

• A. $C{H}_3-C{H}_2-OH$
• B. $C{H}_3-CHO$
• C. $H-COOH$
• D. $C{H}_3-N{H}_2$

Answer: Option B

Explanation:

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

Answer: Option B

Explanation:

• 
• A. 2-হাইড্রক্সি-3-মিথাইল বিউটান্যাল
• B. 2-হাইড্রক্সি-3-মিথাইল প্রোপান্যাল
• C. 3-হাইড্রক্সি-2-মিথাইল বিউটান্যাল
• D. 2,3-ডাইমিথাইল-3-হাইড্রক্সি প্রোপান্যাল

Answer: Option C

Explanation:

• A. $1.50 R_H$
• B. $2.25 R_H$
• C. $0.75 R_H$
• D. $3.00 R_H$

Answer: Option C

Explanation:

• A. $Mg{\left(OH\right)}_2$
• B. $Al{\left(OH\right)}_3$
• C. $KOH$
• D. $NaOH$

Answer: Option D

Explanation:

• A. $Mg{\left(OH\right)}_2$
• B. $Zn{\left(OH\right)}_2$
• C. $Ga{\left(OH\right)}_3$
• D. $B{\left(OH\right)}_3$

Answer: Option D

Explanation:

• A. $Fe$
• B. $At,Al,V_2{O}_2$
• C. $AIC{I}_3$
• D. $Zn$

Answer: Option C

Explanation:

• A. $CO,,N_{2}O, NO$
• B. $BeO, A{l}_2{O}_3, ZnO$
• C. $C{O}_2, P_2{O}_{5 },N_2{O}_5$
• D. $CaO, MgO, NaO$

Answer: Option C

Explanation:

• A. $V_2=V_1\times \frac{1}{2}$
• B. $V_2=2V_1$
• C. $V_2=V_1$
• D. $V_2=V_1\times \frac{1}{4}$

Answer: Option A

Explanation: