Give any two oxo acids of S in its `+ IV and + VI` states. 

Write any two Acid Base indicators.

Give any two uses of potash alum.

Give any two applications of adsorption.

Give any two characters of Echinodermata.

Give any two uses of chloro benzene?

Write the names and formulae of any two oxyacids of sulphur. Indicate the oxidation state of sulphur in them.

Give any two examples to show the negative oxidation state of nitrogen.

Give any two physical porperties of Aniline

Give any two examples of xerarch succession.

Give any two examples of ores with their formulas.