Which compound is used in the preparation of caprolactum?

Molecular formula of some compounds are given in the box. Which monomer is used in preparation of polythene?

If you treat aniline with fuming H_2SO_4 at 475K it gives a compound which is used for the preparation of sulpha drugs. Identify the compound obtained.

If you treat aniline with fuming H_2SO_4 at 475K it gives a compound which is used for the preparation of sulpha drugs.Write the chemical equation.

Which of the following is used for the preparation of a primary amine having one C-atom more than the starting haloalkane?

Some information regardirg a particular, compound is given below. i) A deep.purple black crystal which' is moderately soluble in water at room temperature and it is prepared from pyrolusite a) İdentify the compound b) Give the chemical reactions involved in the preparation of,this compound - c) Upon heating to 746 K, what happens to this compound? Give the equation

Which chromium compound is widely used in tanning of leather?