श्वेत नील का उद्गम इथियोपियाई उच्च भूमि से होता है I
The correct statement with regard to H+2 & H−2 is
Assertion : For drying H2S, Conc. H2SO4 cannot be used.
Reason: Moist H2S is oxidized by Conc.H2SO4
Out of H2SO4(I), H2S2O7(II), H2SO5(III) and H2S2O3(IV):