Question

what is the yellow color substance that turns to brown color when kept in air ?
what is the chemical reaction taking place in form of balanced chemical equation?

Answer 1

A Chemical equation is always balanced on comparison of number of atoms of each element on both sides of the reaction. During the balancing of chemical equation it is need to be followed that “ it has to follow law of conservation of mass (mass on reactants side should be equal to mass on the products side)”