Which is the most stable allotrope of s...

Which is the most stable allotrope of sulphur ?

Octahedral sulphur

Monoclinic sulphur

Plastic sulphur

Colloidal sulphur

Text Solution

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The correct Answer is:

Octahedral sulphur (rhombic or ` alpha `-sulphur ) is the most stable allotrope of sulphur . It is stable at temperature below `95.6^(@)C` . Its specific gravity is 2.06. It melts at `114^(@)C` . It is soluble in carbon disulphide . Its crystal structure contains cyclic `S_(8)` rings packed in a manner which leads to the formation of rhombic crystals.

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A : The valency and oxidation number of sulphur in S_(8) respectively are 2 and 0 . R : S_(8) Rhombic is the most stable allotropic form of sulphur .

If both Assertion & Reason are true and the reason is the correct explanation of the assertion , then mark (1)

If both Assertion & Reason are true but the reason is not the correct explanation of the assertion , then mark (2)

If Assertion is true statement but Reason is false , then mark (3)

If both Assertion and Reason are false statements , then mark (4)

The most stable allotropic form of sulphur is:

rhombic

monoclinic

plastic

milk of sulphur

Which is most stable ?

`CH_(2)=CHCl`

`CH_(2)=CH-CH_(2)Cl`

`C_(6)H_(5)CH_(2)Cl`

`C_(6)H_(5)CH_(2)CH_(2)Cl`