List of top Chemistry Questions on Stoichiometry and Stoichiometric Calculations asked in Assam CEE

\(SO_2\) gas reacts with \(K_2Cr_2O_7\) in presence of \(H_2SO_4\) to produce a coloured substance. If \(10\,g\) of each reactant in pure form were taken to carry out the reaction, what will be the mass of the coloured product? (Atomic masses: H = 1, O = 16, S = 32, K = 39, Cr = 52)
Thermal decomposition of \(2.51\,g\) of an impure sample of \(ZnCO_3\) produces \(0.018\,mol\) of \(CO_2\). The percentage of impurity in \(ZnCO_3\) sample is [Atomic mass of Zn = 65.5]