1. Tardigrade
  2. Question
  3. Chemistry
  4. Consider the following statements: I. In diamond, each carbon atom is s p3 - 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 Si > C > Sn > Ge > Pb The correct statements are

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Q. Consider the following statements:
I. In diamond, each carbon atom is $s p^{3}$ - 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 $Si > C > Sn > Ge > Pb$
The correct statements are

AP EAMCETAP EAMCET 2019

Solution:

(I, II) In diamond, hybridisation of carbon is $s p^{3}$ and graphite has planar hexagonal layer of $C$-atoms. The hybridisation of each $C$ -atom in graphite is $s p^{2}$.

(III) Silicones are organo-silicon polymers formed from inorganic and organic monomer having chemical formula $\left(R_{2} SiO \right)_{n}$, due to non-polar alkyl group, silicones are water repelling in nature.

(IV) The catenation tendency in group $14$ elements decreases due to decrease in element bond strength. Thus, the correct order is

$C >> Si > Ge \approx Sn$
Hence, statement (IV) is incorrect.