Question

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

Answer 1

(a) Element X is sulphur (atomic no. 16) 

(b) K,   L,   M 

      2,   8,   6 

(c)  \(2FeSO_4(s)\overset{Heat}\rightarrow Fe_2O_3(s)+SO_2(g)+SO_3(g)\)

(d) Acidic 

(e) 3rd period, group 16