1. Zn is reduced to Zn2+
2. Zn is oxidizes to Zn2+
3. Zn2+is oxidized to Zn
4. Cu2+is oxidized to Cu
Zn is oxidizes to Zn2+
1. + 3
2. + 6
3. 0
4. - 3
+ 6
1. CrO42-→Cr2O72-
2. Cr→ CrCl3
3. Na→Na+
4. 2S2O32-→S4O62-
CrO42-→Cr2O72-
1. + 3
2. + 2
3. + 1
4. - 1
+ 1
1. +6
2. -6
3. +7
4. +4
+6
1. C2H6
2. C6H6
3. CH3Cl
4. C12H22O11
C12H22O11
1. FeS2+4N2→8SO2+2Fe2O3
2. 4FeS2+6O2→2Fe2O3+8SO2
3. 4FeS2+11O2→2Fe2O3+8SO2
4. 2FeS2+11O2→Fe2O3+6SO2
4FeS2+11O2→2Fe2O3+8SO2
1. Gain of electrons
2. Loss of an electronegative radical
3. Undergo decrease in the oxidation number of one of its atoms
4. Undergo any one of the above changes
Undergo any one of the above changes
1. 2Na+Cl2→ 2NaCl
2. C+O2→CO2
3. AgNO3+NaCl→ AgCl+NaNO3
4. Zn+H2SO4→ ZnSO4+H2
AgNO3+NaCl→ AgCl+NaNO3
1. Heisenberg's principle
2. Aufbau rule
3. Pauli's exclusion principle
4. Hund's rule
Pauli's exclusion principle