Write Hunsdiecker reaction for the formation of Bromobenzene.

In the ring test of NO_(3)^(-) ion , Fe^(2+) ion reduces nitrate ion to nitric oxide, which combines with Fe^(2+) to form brown complex . Write the reactions involved in the formation of brown ring .

Ester formation involves the reaction of

Write the favourable factors for the formation of ionic bond .

Write down the reactions involved during the formation of photochemical smog.

Write the balanced chemical equation of the reaction for the formation of metallic iron from ferric oxide by thermit process. Write an application of the process.

The standard enthalpy of formation of C_(7)H_(5)N_(3)O_(6)(s) is -x kJ*mol^(-1) at 25^(@)C . Write the thermochemical equation for the formation reaction of the compound.

Write the reaction of thermal decomposition of sodium azide.

The substances which stops or slows down the reaction after the formation of substrate are called ___________.

Phenol and formaldehyde undergo condensation to give a polymer (A) which on heating with formaldehyde gives a thermosetting polymer (B). Name the polymers. Write the reactions involved in the formation of (A). What is the structural difference between two polymers?

Write the mechanism of the reaction of HI with methoxybenzene.