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  • An element X which is a yellow solid at room temperature shows catenation and allotropy. X forms two oxides which are also formed during the thermal decomposition of ferrous sulphate crystals and are the major air pollutants. (a) Identify the element X

An element X which is a yellow solid at room temperature shows catenation and allotropy. X forms two oxides which are also formed during the thermal decomposition of ferrous sulphate crystals and are the major air pollutants.
(a) Identify the element X
(b) Write the electronic configuration of X
(c) Write the balanced chemical equation for the thermal decomposition of ferrous sulphate crystals?
(d) What would be the nature (acidic/ basic) of oxides formed?
(e) Locate the position of the element in the Modern Periodic Table.

Answers (1)

(a) X is Sulphur
Atomic number of Sulphur = 16
(b) Electronic configuration of Sulphur = 2, 8, 6
(c)

2FeSO_{4}\left ( s \right )+Heat\rightarrow Fe_{2}O_{3}\left ( s \right )+SO_{2}\left ( g \right )+SO_{3}\left ( g \right )
(d) Oxides of Sulphur (SO2, SO3) are acidic in nature.
(e) Sulphur belongs to Group 16, Period 3 in the Modern Periodic Table.

 

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