1. 0, +1 and -2
2. + 2, +1 and -2
3. 0, +1 and +2
4. -2, +1 and -2
0, +1 and -2
1. Na
2. O
3. Cl
4. None of these
Cl
1. Cl-
2. ClO-
3. ClO-2
4. ClO-3
ClO-3
1. Decolourisation of coloured material
2. Extraction and purification of metals
3. Destruction of metals by oxidation
4. Using oxygen for biological redox reaction
Decolourisation of coloured material
1. Gain of electrons
2. Loss of an electronegative radical
3. Gain of electropositive radical
4. Increase in the oxidation number of one of the atoms
Increase in the oxidation number of one of the atoms
1. NaOH +HCl → NaCl +H2O
2. BaCl2+H2SO4→ BaSO4+2HCl
3. CuSO4+2H2O→Cu(OH)2+H2SO4
4. Zn+2HCl→ ZnCl2+H2
Zn+2HCl→ ZnCl2+H2
1. 7
2. 8
3. +1
4. 4
7
1. Precipitation reactions
2. Acid- base neutralisation
3. Redox reaction
4. All of these
Redox reaction
1. Manganese dioxide
2. Manganese chloride
3. Manganese sulphate
4. Potassium permanganate
Potassium permanganate
1. + 4
2. + 3
3. + 2
4. Zero
Zero