Q. Consider the following statements:
I. In diamond, each carbon atom is - hybridised.
II. Graphite has planar hexagonal layers of carbon atoms.
III. Silicones being surrounded by non-polar alkyl groups are water repelling in nature.
IV. The order of catenation in group 14 elements is
The correct statements are

 1431  240 AP EAMCETAP EAMCET 2019 Report Error

Solution:

(I, II) In diamond, hybridisation of carbon is and graphite has planar hexagonal layer of -atoms. The hybridisation of each -atom in graphite is .

(III) Silicones are organo-silicon polymers formed from inorganic and organic monomer having chemical formula , due to non-polar alkyl group, silicones are water repelling in nature.

(IV) The catenation tendency in group elements decreases due to decrease in element bond strength. Thus, the correct order is


Hence, statement (IV) is incorrect.