Write one method of preparation of Aromatic hydrocaboan

What is aromatic hydrocarbon?

Write the method of preparation of potassium dichromate.

Distinguish between ortho and para hydrogen Describe one method of preparation of H_2O_2 in the laboratory.

Write one common method for the preparation of ethanal & prop-2-one.

Write one general method of preparation for each of the alkene and alkyne.

Write one use of ZSM-5

Write one general method for the preparation of the following compound with necessary equations. Phenols

Write one general method for the preparation of the following compound with necessary equations. Ethers

Write one general method for the preparation of the following compound with necessary equations. Primay alcohol