which one of the following is a redox reaction?

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which one of the following is a redox reaction?

a) H+(aq) + OH-(aq) --> H2O(l)
b) 2KBr(aq) + Pb(NO3)2(aq) --> 2KNO3(aq) + PbBr2(s)
c) CaBr2(aq) + H2SO4(aq) --> CaSO4(s) + 2HBr(g)
d) 2Al(s) + 3H2SO4 --> Al2(SO4)3(aq) + 3H2(g)
e) CO3(2-)(aq) + HSO4-(aq) --> HCO3-(aq) + SO4(2-)

Im totally confused! any help would be great...

2007-05-07 22:56:32 · 2 answers · asked by confused! 1 in Science & Mathematics ➔ Chemistry

2 answers

Only letter d is a redox reaction. Al is oxidized from 0 to +3 and hydrogen reduced from +1 to 0.

2007-05-07 23:19:38 · answer #1 · answered by jill_quitayen 2 · 0⤊ 0⤋

d) 2Al(s) + 3H2SO4 --> Al2(SO4)3(aq) + 3H2(g)

2007-05-08 06:24:18 · answer #2 · answered by ag_iitkgp 7 · 0⤊ 0⤋