Chemistry
Write half-reactions for the following reaction :
A+ + B ⟶ A + B+ and name the following:
(a) oxidizing agent
(b) substance oxidized
(c) reducing agent.
Related Questions
Select the odd one out and justify your answer.
(a) Zn, Fe, Mg and Na
(b) SO2, H2S, NH3 and CO2
(c) Fe, Zn, Cu and Mg
(d) Fe, Pb, Al and Zn
Give reasons
(a) Hydrogen is collected by the downward displacement of water and not of air, even though it is lighter than air.
(b) A candle brought near the mouth of a jar containing hydrogen gas starts burning but is extinguished when pushed inside the jar.
(c) Apparatus for laboratory preparation of hydrogen should be airtight and away from a naked flame.
State whether the following conversions are oxidation or reduction reactions.
(a) PbO2 + SO2 ⟶ PbSO4
(b) Cu2+ + 2e- ⟶ Cu
(c) K ⟶ K+ + e-
(d) 2Cl- - 2e- ⟶ Cl2
State, giving reasons, whether the substances printed in bold letters have been oxidised or reduced.
(a) PbO + CO ⟶ Pb + CO2
(b) Mg + 2HCl ⟶ MgCl2 + H2
(c) H2S + Cl2 ⟶ 2HCl + S
(d) Cl2 + H2S ⟶ 2HCl + S