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Consider the following statements: I. ...

Consider the following statements:
I. In diamond, each carbon atom is `sp^(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 `gt C gt Sn gt Ge gt pb.`
The correct statements are

A

I,II,III

B

II,III, IV

C

I,II, IV

D

I, III, IV

Text Solution

Verified by Experts

The correct Answer is:
A
(I, II) In diamond, hybridisation of corbon is `sp^(3)` and graphite has planar hexagonal layer of C - atoms. The hybridisation of each C- atom in graphite is `sp^(2)`
(III) Silicones are organo -silicon polymers formed from inorganic and organic monomer having chemical formula `(R_(2)SiO)_(n)`, due to non-polar alkyl group, silicones are water repelling in nature,
(IV) The caternation tendency is group 14 elements decreases due to decreases in element bond strength. thus, the correct order is
C `gt gt S , gt Ge approx ` Sn
hence, statement (IV) is incorrect.
thus, option (a) is correct.
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