Give equations for the conversions of – Ethene, Ethyne to:

Ethene	Ethyne
(a) Ethane	(a) Ethane [2 steps ]	by - Catalytic hydrogenation - H2
(b) 1,2 dichloroethane	(b) 1,1,2,2 tetrachloroethane [2 steps]	by- Halogenation - Cl2
(c) 1,2 dibromoethane	(c) 1,1,2,2 tetrabromoethane [2 steps]	- Br2
(d) 1,2 diiodoethane	(d) 1,2 diiodoethene	- I2
(e) Bromoethane/Chloroethane	(e) 1,1 -dibromo & 1,1-dichloroethane	by- Halogen acids - HBr/HCl by - Polymerization
(f) Polyethylene	(f) Copper or silver Acetylide	by Ammoniacal - CuCl/AgNO3

(a) Conversion of Ethene to Ethane by Catalytic hydrogenation (H₂):

$\underset{\text{ ethene}}{\text{C}$2\text{H}4} + \text{H}2 \xrightarrow[300\degree\text{C}]{\text{Nickle}} \underset{\text{ethane}}{\text{C}2\text{H}_6}

(b) Conversion of Ethene to 1,2 dichloroethane by Halogenation (Cl₂):

(c) Conversion of Ethene to 1,2 dibromoethane by Halogenation (Br₂):

(d) Conversion of Ethene to 1,2 diiodoethane by Halogenation (I₂):

$\underset{\text{ ethene}}{\text{C}$2\text{H}4} + \text{I}2 \xrightarrow[\text{[inert solvent]}]{\text{CCl}4} \underset{\text{1,2, di iodoethane}}{\text{C}2\text{H}4\text{I}_2}

(e)(i) Conversion of Ethene to Bromoethane by Halogen acids (HBr):

$\underset{\text{ ethene}}{\text{C}$2\text{H}4} + \text{HBr} \longrightarrow \underset{\text{Bromoethane}}{\text{CH}3\text{CH}2\text{Br}}

(e)(ii) Conversion of Ethene to Chloroethane by Halogen acids (HCl):

$\underset{\text{ethene}}{\text{C}$2\text{H}4} + \text{HCl} \longrightarrow \underset{\text{Chloroethane}}{\text{CH}3\text{CH}2\text{Cl}}

(f) Conversion of Ethene to Polyethylene by Polymerization:

Ethene polymerises to produce polythene

$\underset{\text{ethene}}{\text{n H}$2\text{C = C}\text{H}2} \xrightarrow[\text{high pressure catalyst}]{\text{high temperature}} \underset{\text{(Polythene)}}{\Big[\text{H}2\text{C—C}\text{H}2\Big]_\text{n}}

(a) Conversion of Ethyne to Ethane [2 steps] by Catalytic hydrogenation (H₂):

(b) Conversion of Ethyne to 1,1,2,2 tetrachloroethane [2 steps] by Halogenation (Cl₂):

(c) Conversion of Ethyne to 1,1,2,2 tetrabromoethane [2 steps] by Halogenation (Br₂):

(d) Conversion of Ethyne to 1,2 diiodoethene by Halogenation (I₂):

$\underset{\text{ ethyne}}{\text{HC ≡ CH}} + \text{I}_2 \xrightarrow{\text{alcohol}} \underset{\text{1,2 di iodoethene}}{\text{H — } \overset{\underset{\normalsize{|}}{\normalsize{I}}}{\text{C}} = \overset{\underset{\normalsize{|}}{\normalsize{I}}}{\text{C}} \text{ — H}}$

(e)(i) Conversion of Ethyne to 1,1 dibromo ethane by Halogen acids (HBr):

(e)(ii) Conversion of Ethyne to 1,1 dichloro ethane by Halogen acids (HCl):

(f)(i) Conversion of Ethyne to Copper Acetylide by Ammoniacal Cuprous Chloride:

$\underset{\text{ ethyne}}{\text{HC ≡ CH}} + 2\text{CuCl} + 2\text{NH}$4\text{OH} \longrightarrow \underset{\text{Copper Acetylide}}{\text{Cu-C ≡ C-Cu}} + 2\text{NH}4\text{Cl} + 2\text{H}_2\text{O}

(f)(ii) Conversion of Ethyne to Silver Acetylide by Ammoniacal Silver Nitrate:

$\underset{\text{ ethyne}}{\text{HC ≡ CH}} + 2\text{AgNO}$3 + 2\text{NH}4\text{OH} \longrightarrow \underset{\text{Silver Acetylide}}{\text{Ag-C ≡ C-Ag}} + 2\text{NH}4\text{NO}3 + 2\text{H}_2\text{O}