27680 When temporary hard water containing Mg(HCO3)2 is boiled the ppt. formed is of
(c) Mg(OH)2 is less soluble than MgCO3. On boiling temporary hard water containing Mg+2 ions, the ppt. obtained is of Mg(OH)2 are not that of MgCO3.
27620 There is a sample of 10 volume of hydrogen peroxide solution. Calculate its strength.........%
(d) [H2O2→H2O+12O2]×22H2O268g→2H2O+O2 22.4 litre at N.T.P.22.4 litre O2 at N.T.P. obtained by 68 gm of H2O210 litre O2 at N.T.P. obtained by 6822.4×10=30.35gm/litre1000 ml O2 at N.T.P. obtained by = 30.35 gm100 ml O2 at N.T.P. obtained by =30.351000×100=3.035%
27621 In lab H2O2 is prepared by
(a) H2SO4+BaO2→BaSO4+H2O2
27622 The structure of H2O2 is
The structure of H2O2 is open book shaped.
27623 HCl is added to the following oxides which one would give H2O2
(c) BaO2+2HCl→BaCl2+H2O2