Red lead is

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

The order of catenation power is $Ge < Si < C$. What are the $C-C$,$Si-Si$,and $Ge-Ge$ bond energies (in $kJ/mol$) respectively?

Match List-$I$ with List-$II$.

List-$I$	List-$II$
$A$. Coke	$I$. Carbon atoms are $sp^3$ hybridised
$B$. Diamond	$II$. Used as a dry lubricant
$C$. Fullerene	$III$. Used as a reducing agent
$D$. Graphite	$IV$. Cage like molecules

Choose the correct answer from the options given below:

Which of the following statements are correct?
$(i)$ $CCl_4$ undergoes hydrolysis easily
$(ii)$ Diamond has directional covalent bonds
$(iii)$ Fullerene is the thermodynamically most stable allotrope of carbon
$(iv)$ Glass is a man-made silicate
The correct answer is

$PbO_2$ reacts with concentrated $HNO_3$. The gas evolved is: