Preparation of looking mirrors involves the use of ammonical `AgNO_3` red lead HCHO. Explain the funstion of each.

Preparation of looking mirrors involves the use of ammonical AgNO_3 +red lead+ HCHO. Explain the function of each.

Write the spherical mirror's formula and explain the meaning of each symbol used in it.

A Compound with the empirical formula Co(NH_3)_5 BrSO_4 exists in two forms : red and violet. Solution of red gives a precipitate of AgBr on addition of AgNO_3 . The violet form Sives no precipitate on the addition at AgNO_3 but gives a white precipitate on addition of BaCl_2 solution. From these observations draw the structure of each compound and explain the observations.

Write down the reaction involved in the preparation of following using the reagents indicated against in parenthesis. "Ethyl benzene from benzene." [C_(2)H_(5)OH,PCl,"anhyd."AlCl_(3)]

Write down the reactions involved in the preparation of the following using the reagents indicated against in parenthesis. 'Propionic anhydride from propionaldehyde'. [AgNO_3, NH_4 OH, P_2 O_5] .