Balance the following chemical equations:

Combustion of propylene:

a$)C_3{H}_6+O_{2}C{O}_2+H_{2}O$

Hydrogenation of Acetylene to Ethane:

b$)C_2{H}_2+H_2{C}_2{H}_6$

Producing hydrogen from aluminium and caustic soda in water:

c$)Al+$NaOH$+H_{2}ONaAl{O}_2+H_2$

Neutralisation of sulphuric acid with caustic soda:

d$)H_{2}S{O}_4+$NaOH$N{a}_{2}S{O}_4+H_{2}O$

Cracking of ethane to ethylene:

e$)C_2{H}_6{C}_2{H}_4+H_2$