Classify the following as elements or compound :
Iron , Iron sulphide, Sulphur, Chalk, Washing soda, Sodium, Carbon, Urea
element: iron,sulphur, sodium ,carbon
compound: iron sulphide ,chalk ,wahing soda ,urea
Classify the following substances into compounds and mixtures :
Carbon dioxide, air, water, milk, common salt, blood, fruit juice, iron sulphide.
Classify the following into elements and compounds:
Water, Hydrogen, Salt, Gold, Carbon dioxide, Iron