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Characteristics of p- Block Elements

No form of el...

Question

No form of elemental silicon is comparable to graphite. Give reason.

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Solution

Silicon does not form graphite like structure as size of silicon is larger than carbon . Due to the small size of carbon , it will form large chains. Carbon shows catenation .i.e. self linking property. But silicon does not show much catenation .

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Q. Assertion :Silicon is not expected to form an allotrope with graphite like structures. Reason: There is feasibility to

p - p π

bond in silicon.

Q. Catenation is the ability of an atom to form bonds with other atoms of the same element. It is exhibited by both carbon and silicon. Compare the ability of catenation of the two elements. Give reasons.

Q. Which of the following is not an element ?
(a) graphite
(b) germanium
(c) silica
(d) silicon

Diamond and graphite are allotropes of carbon.

Reason: Some elements can have different structural forms called allotropes.

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 π - p π

bonding while silicon shows negligible extent of

p π - p π

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Characteristics of p- Block Elements

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