321275 \(\mathrm{NaCl}\) reacts with conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) and \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) to give reddish fumes (B), which react with
\(\mathrm{NaOH}\) to give yellow solution (C) . (B) and
(C) respectively are :

321276 When sulphur dioxide is passed in an acidified \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}\) solution, the oxidation state of sulphur is changed from

321277 When orange solution containing \(\mathrm{\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}}\) ion is treated with an alkali, a yellow solution is formed and when \(\mathrm{\mathrm{H}^{+}}\)ions are added to yellow solution, an orange solution is obtained. Explain why does this happen?

321278 The ionic charges on chromate ion and dichromate ion respectively is

321275 \(\mathrm{NaCl}\) reacts with conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) and \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) to give reddish fumes (B), which react with
\(\mathrm{NaOH}\) to give yellow solution (C) . (B) and
(C) respectively are :

321276 When sulphur dioxide is passed in an acidified \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}\) solution, the oxidation state of sulphur is changed from

321277 When orange solution containing \(\mathrm{\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}}\) ion is treated with an alkali, a yellow solution is formed and when \(\mathrm{\mathrm{H}^{+}}\)ions are added to yellow solution, an orange solution is obtained. Explain why does this happen?

321278 The ionic charges on chromate ion and dichromate ion respectively is

321275 \(\mathrm{NaCl}\) reacts with conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) and \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) to give reddish fumes (B), which react with
\(\mathrm{NaOH}\) to give yellow solution (C) . (B) and
(C) respectively are :

321276 When sulphur dioxide is passed in an acidified \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}\) solution, the oxidation state of sulphur is changed from

321277 When orange solution containing \(\mathrm{\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}}\) ion is treated with an alkali, a yellow solution is formed and when \(\mathrm{\mathrm{H}^{+}}\)ions are added to yellow solution, an orange solution is obtained. Explain why does this happen?

321278 The ionic charges on chromate ion and dichromate ion respectively is

321275 \(\mathrm{NaCl}\) reacts with conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) and \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) to give reddish fumes (B), which react with
\(\mathrm{NaOH}\) to give yellow solution (C) . (B) and
(C) respectively are :

321276 When sulphur dioxide is passed in an acidified \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}\) solution, the oxidation state of sulphur is changed from

321277 When orange solution containing \(\mathrm{\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}}\) ion is treated with an alkali, a yellow solution is formed and when \(\mathrm{\mathrm{H}^{+}}\)ions are added to yellow solution, an orange solution is obtained. Explain why does this happen?

321278 The ionic charges on chromate ion and dichromate ion respectively is