Which of the following statements regarding sulphur is incorrect?

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The oxidation state of sulphur is never less than +4 in its compounds.

At 600 °C, the gas mainly consists of $S_{2}$ .

The vapour at 200 °C consists mainly of $S_{8}$ ring.

$s_{2}$ molecule is paramagnetic.

answer is A.

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Detailed Solution

we have the oxidation state of sulphur is never less than +4 in its compounds. This option is incorrect as we know sulphur belongs to group 16 and its oxidation state varies from -2 to +6. In sulphuric acid it is +6 and in hydrogen sulphide it is -2 and that in S8 $S_{8}$ is 0. Therefore, this statement is incorrect about sulphur.

Therefore, the correct answer is option D $D$ the oxidation state of sulphur is never less than +4 in its compounds.

The oxidation state of S in $H_{2} S$ is - 2, which is less than +4. Hence, the choice (a) is incorrect.

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