More than one option may be correct1: one mole BaF2 + 2mole H4S4…………….>resulting mixture will be neutralised by:(a)\t1 mole of KOH(b) 2mole of Ca(OH)2(c)4mole KOH\t(d) 2mole of KOH2: when (NH4)2Cr2O7 is heated:(a)there is oxidation of N(b)there is reduction of Cr(c)net reaction is disportionation (d) net reaction is neutralization3: 11.2g of mix of MCl(volatile) & NaClgave 28.7g of white ppt with excess of AgNO3 soln.11.2g of same mix on heating gave a gas that on passing in t o AgNO3soln gave 14.35g of white ppt. hence:(a)ionic mass of M+is 18 (b)ionic mix have equal mile fraction of MCl & NaCl.(c) MCl & NaCl are in molar ratio 1:2 (d) ionic mass of M+is 104: 10.78 g of H3PO4 in 550 ml solution is 0.40N. thus this acid has been:(a)neutralised to HPO42-(b) neutralised to PO43-(c)reduced to HPO32-(d) neutralised to H2PO4-

raghvendra dixit , 12 Years ago

Grade 12