Identify $B$ in the following reaction:
$H_4SiO_4$ $\xrightarrow[{-H_2O}]{1000^{\circ}C} A$ $\xrightarrow[\Delta]{Carbon} B + CO$

Which of the following statements is $NOT$ true?

Consider the following statements:
Statement-$I$: $CCl_4$ does not undergo hydrolysis,but $SiCl_4$ undergoes hydrolysis.
Statement-$II$: Thermal and chemical stability of $GeX_4$ is more than $GeX_2$.
The correct answer is:

Select the correct order of melting point:

Which of the following statements are correct?
$1.$ Charcoal can be obtained by heating wood in the absence of air.
$2.$ Charcoal is an impure form of graphite.
$3.$ Diamond is thermodynamically the most stable allotrope of carbon.
$4.$ Coke is used as an oxidising agent during the extraction of iron from its ores.

Which of the following is an amphoteric oxide?