The sides of a matchbox have a coating of:

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(C) The rubbing surface on the sides of a safety matchbox is coated with a mixture of powdered glass and red phosphorus $(P_4)$. The match head contai

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Antimony sulphide,red phosphorus

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(C) The rubbing surface on the sides of a safety matchbox is coated with a mixture of powdered glass and red phosphorus $(P_4)$. The match head contains potassium chlorate $(KClO_3)$,antimony sulphide $(Sb_2S_3)$,and glue. When the match is struck against the side,the heat generated converts some red phosphorus into white phosphorus,which reacts with potassium chlorate to produce enough heat to ignite the antimony sulphide.

Column $I$	Column $II$
$A$. Silica gel	$i$. Transistor
$B$. Silicon	$ii$. Ion-exchanger
$C$. Silicone	$iii$. Drying agent
$D$. Silicate	$iv$. Sealant

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Match the items in Column $I$ with its main use listed in Column $II$.

Column $I$ Column $II$

$A$. Silica gel $i$. Transistor

$B$. Silicon $ii$. Ion-exchanger

$C$. Silicone $iii$. Drying agent

$D$. Silicate $iv$. Sealant

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