${\mathrm{CH}}_3\mathrm{Cl}\stackrel{\mathrm{Na}}{\to }$Gas A

${\mathrm{CH}}_2\mathrm{COONa}-{\mathrm{CH}}_2\mathrm{COONa}$$\underset{\mathrm{Electrolysis}}{\overset{\mathrm{Kolbe}\text{'}\mathrm{s}}{\to }}$Gas B

${\mathrm{Mg}}_2{\mathrm{C}}_3\stackrel{{\mathrm{H}}_2\mathrm{O}}{\to }$Gas C

Gas (A+B+C) $\underset{{\mathrm{Cu}}_2{\mathrm{Cl}}_2}{\overset{\mathrm{Ammoniacal}}{\to }}$

gas mixture $\underset{\mathrm{Alk}. {\mathrm{KMnO}}_4}{\overset{\mathrm{Cold} \mathrm{dil}}{\to }}$ Gas X

Gas X is same is

1. Gas A + Gas B                      2. Only Gas B

3. Gas B + Gas C                      4. Only Gas A

1. 3-Keto butanol

2. Butane-1,4-dial

3. 3-Oxo-butan-1-al

4. 2-Keto-butane-1,4-dial

$\stackrel{1\mathrm{eq}.\mathrm{NBS}}{\to }$ X$\stackrel{{\mathrm{PhO}}^{-}}{\to }$Y (major product)

The product Y is

The product (s) obtained via oxymercuration-dermercuration of butyne would be

1.                                2. 

3. +${\mathrm{CH}}_2\mathrm{O}$                    4.+ HCOOH

2-bromopentane is heated with potassium ethoxide in ethanol. The major product obtained is- 

1. 2-Ethoxypentane               

2. Pent-1-ene

3. trans-pent-2-ene               

4. cis-Pent-2-ene

Which of these will not react with acetylene?

1. NaOH                                       

2. Amm. ${\mathrm{AgNO}}_3$

3. Na                                           

4. HCl

$\hspace{0.17em}\mathrm{R}-{\mathrm{CH}}_2-{\mathrm{CCl}}_2-\mathrm{R}\stackrel{\mathrm{Reagent}}{\to }$$\mathrm{R}-\mathrm{C}\equiv \mathrm{C}-\mathrm{R}$

1. Na                                     
2. HCl in ${\mathrm{H}}_2\mathrm{O}$
3. KOH in ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}$               
4. Zn in alcohol 

In the following reaction the catalyst used is:

         $\to$${\mathrm{C}}_6{\mathrm{H}}_6$ + 3${\mathrm{H}}_2$

1. ${\mathrm{Cr}}_2{\mathrm{O}}_3$                                      2. $A{l}_2{\mathrm{O}}_3$

3. Zn dust                                    4. ${\mathrm{Cr}}_2{\mathrm{O}}_3$ and $A{l}_2{\mathrm{O}}_3$

Gammexane (a $\mathrm{\gamma }$-isomer) is:

1. BHC                                         

2. Benzene hexachloride

3. Lindane                                     

4. All of the above

During ozonolysis of ${\mathrm{CH}}_2={\mathrm{CH}}_2$, if hydrolysis is made in the absence of Zn dust, the products formed are: