Question
When a mixture of NaBr and NaCl is repeatedly digested with H2SO4, all the halogens are expelled and Na2SO4 is formed quantitatively. With a particular mixture, it was found that the mass of Na2SO4 obtained is precisely the same as the mass of NaBr and NaCl mixture taken. The mass ratio of NaCl and NaBr in the mixture is (as nearest integer only) :