Solvay process is used in the manufacture of

Which of the following metals forms an amphoteric oxide?

In which of the following cannot sodium metal be stored?

Which of the following metals,upon burning in moist air,does not produce the smell of ammonia?

Thermite is a mixture of

The correct order of electrical conductivity of alkali metal ions in their aqueous solution for $Cs^{+}$, $K^{+}$, $Na^{+}$, and $Li^{+}$ is: