Microcosmic salt is  

Fires that result from the combustion of alkali metals can be extinguished by  

The atomic radius for Li and Li⁺ are 12.3 Å and 0.76 Å respectively. Assuming that the difference in ionic radii relates to the space occupied by 2s electrons. What will be the % of volume of Li atom occupied by single valence electron?

Which is the most basic of the following?   

Nitrogen dioxide cannot be prepared by heating 

A more economical process but based on same principle was given by

In the preparation of sodium carbonate (Na₂CO₃), which of the following is used?

Which alkali metal can be preferably used in photoelectric cell?

Solubility of alkaline earth metal sulphates decreases down the group 2 because 

Which of the following has lowest thermal stability?