Sulphur, on heating, follows which of the following sequence? 

Steps involved in the Frasch process are given below. Arrange them in the correct sequence. 

($1$) This melts the sulphur below melting point. 

($2$) The sulphur foam formed rises in the middle pipe and is collected. 

($3$) Superheated steam under pressure is sent through the outermost pipe. 

($4$) Hot compressed air is sent through the innermost pipe, which froths up the molten sulphur below. 

($5$) Three concentric pipes are drilled through the ground to the sulphur deposits. 

Different steps involved in the manufacture of sulphuric acid in the contact process are given below. Arrange them in the correct sequence. 

($1$) formation of oleum 
($2$) oxidation of ${\mathrm{SO}}_2$

($3$) hydrolysis of oleum 

($4$) combustion of sulphur 

Arrange the different forms of sulphur formed during heating followed by cooling: 

($1$) $\mathrm{\mu }$ sulphur

($2$) flower of sulphur

($3$) Rhombic sulphur

($4$) sulphur vapour

($5$) lambda sulphur

($6$) monoclinic sulphur 

Slaked lime on reaction with ammonium chloride gives 

Different steps involved in the mechanism of preparation of sodium hydroxide by the Castner process are given below. Arrange them in the correct sequence.

$$\begin{gathered} \left(1\right) 2{\mathrm{Cl}}^{-}\to {\mathrm{Cl}}_2+2{\mathrm{e}}^{-} \\ \left(2\right) {\mathrm{Na}}_2\mathrm{Hg}-2{\mathrm{e}}^{-}\to 2{\mathrm{Na}}^{+}+\mathrm{Hg} \\ \left(3\right) 2{\mathrm{H}}_2\mathrm{O}+2{\mathrm{e}}^{-}\to {\mathrm{H}}_2+2{\mathrm{OH}}^{-} \\ \left(4\right) \mathrm{Hg}+2{\mathrm{Na}}^{+}+2{\mathrm{e}}^{-}\to {\mathrm{Na}}_2\mathrm{Hg} \\ \left(5\right) 2\mathrm{NaCl}\to 2{\mathrm{Na}}^{+}+2{\mathrm{Cl}}^{-} \\ \left(6\right) 2{\mathrm{Na}}^{+}+2{\mathrm{OH}}^{-}\to 2\mathrm{NaOH} \end{gathered}$$

The steps involved in the manufacture of glass are given below. Arrange them in the correct sequence. 

$\left(1\right)$ moderate cooling 

$\left(2\right)$ addition of cullet 

$\left(3\right)$ formation of respective silicates 

$\left(4\right)$ preparation of fine powder of raw materials 

$\left(5\right)$ heating of cullet at about $1600 \mathrm{K}$ to $1700 \mathrm{K}$  

Different processes involved in the manufacture of pottery or ceramic materials are given below. Arrange them in a proper sequence. 

($1$) change in the physical and chemical properties of the substances 

($2$) heating to a suitable high temperature

($3$) drying of the mixture 

($4$) preparation of mixture by adding water to raw materials