TS EAMCET 2018 (04-May Shift-1)

Which one of the following oxide dissolves in both hydrochloric acid and sodium hydroxide?

The correct order of electrical conductivity of alkali metals ions in their aqueous solution for ${\mathrm{Cs}}^{+}, {\mathrm{K}}^{+}, {\mathrm{Na}}^{+}$ and ${\mathrm{L}}^{+}$ is

The alkaline earth metal sulphate, which has its hydration enthalpy greater than its lattice energy is

A metal $\text{'}\mathrm{M}\text{'}$ readily gives ${\mathrm{MSO}}_4,$ which is soluble in water. It forms its oxide $\mathrm{M}0$ which is amphoteric. It forms an insoluble hydroxide $\mathrm{M}(\mathrm{OH}{)}_2,$ which is soluble in $\mathrm{NaOH}$ solution. The $\mathrm{M}$ is

Identify $\mathrm{X}$ and $\mathrm{Y},$respectively in the following reactions

When sodium $\left(\mathrm{Na}\right)$ metal is dissolved in liquid ammonia $\left({\mathrm{NH}}_3\right)$, it imparts a blue colour to the solution. This blue coloration is due to:

Which one of the following options is correct pertaining to the below transformations?
$\mathrm{Na}+{\mathrm{NH}}_3\left(\mathrm{l}\right)⟶$ Coloured solution $\stackrel{\text{ on standing }}{⟶}\mathrm{X}+\mathrm{Y}$

Powdered Beryllium burns in air to give