Identify the correct statements from the following. i) Quartz is a piezoelectric material ii) All group 14 tetrachlorides except CCl 4 are easily hydrolyzed in water. iii) The C - C bond distance within the layer of graphite is 154 pm . iv) SiO 2 is soluble in aqueous HCl solution.

Step-by-step solution

1) Quartz is hard, crystalline mineral composed of silicon and oxygen. The atoms are linked in a continuous framework of SiO 4 silicon-oxygen tetrahedra, with each oxygen being shared between the two tetrahedra. The first piezoelectric material used in electronic devices is the quartz crystal. 2) Group 14 tetrachloride except CCl 4 are easily hydrolyzed by water, it is because of non-availability of the vacant d - orbitals and steric crowding due to the presence of 4 - Cl atoms around C - atom which does not allow