Which of the following is kept in water?

$C_{60}$ contains:

The element that does $NOT$ show catenation is

In the following reaction,assign the nature of the product of complete hydrolysis at $R.T.$ for the underlined atom:
$\underline{Si}H_4 + 4H_2O \longrightarrow H_4SiO_4 + 4H_2$

$P_2O_5$ is used extensively as a

Manmade silicate is $........$
$........$ is used to convert alcohols directly into gasoline. Give the use of hydrated zeolites.