The presence of $Si$ in steel gives it

In the carbon family,elements other than carbon do not form $p\pi-p\pi$ bonds because their atomic radii are very ........

$A$ $1 \ L$ flask is full of brown bromine vapour. The intensity of the brown colour of the vapour will not decrease appreciably on adding which of the following to the flask?

In the following reaction,assign the state for the underlined atom in the product of complete hydrolysis at $R.T.$:
$\underline{S}OF_4 + H_2O \longrightarrow H_2SO_4 + HF$

Silicon is the main constituent of

Among the following nitrates,Lead nitrate,Silver nitrate,and Ammonium nitrate; the one that decomposes without leaving any solid residue is