1. K+ > Na+ > Rb+ > Cs+
2. Cs+ > Rb+ > K+ > Na+
3. Rb+ > K+ > Cs+ > Na+
4. Na+ > K+ > Rb+ > Cs+
In the Solvay process of manufacturing sodium carbonate, the raw materials used are :
1. Aqueous NaOH, and
2. Molten NaOH, and CO
3. Brine NaCl, and CO
4. Brine NaCl, and