Graphite is a good conductor of heat and electricity because it contains :

Q. Assertion :STATEMENT 1: Silicon exists only in diamond-like structure while carbon exists both in diamond and graphite forms. Reason: STATEMENT 2: Carbon can show pronounced $p\pi -p\pi$ bonding while silicon shows negligible extent of $p\pi -p\pi$ bonding.

Q. Graphite is a good conductor of electricity because it has:

Q. Consider the following statements:
I: In diamond, each carbon atom is linked tetrahedrally to four other carbon atoms by $s{p}^3$ bonds.
II: Graphite has planar hexagonal layers of carbon atoms held together by weak van der Waal's forces.
III: Silicon exists only in diamond structure due to its tendency to form $p\pi -p\pi$ bonds to itself.

Q. Assertion :Graphite is a good conductor of heat and electricity Reason: Graphite has all the electrons firly held together in C-C $\sigma$-bonds

Q. Graphite is a good conductor of electricity because: