Which of the following compounds has the lowest anion to cation size ratio? 

Nitrogen dioxide cannot be prepared by heating 

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

Microcosmic salt is  

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

Which is the most basic of the following?   

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?

Reaction given in passage is spontaneous because

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

Which alkali metal can be preferably used in photoelectric cell?