An alkaline earth metal $(M)$ gives a salt with chlorine,which is insoluble in water at room temperature but soluble in boiling water. It also forms an insoluble sulphate whose mixture with a sulphide of a transition metal is called 'lithopone' - a white pigment. Metal $M$ is

Which of the following is the strongest base?

Given below are two statements:
Statement $I$: None of the alkaline earth metal hydroxides dissolve in alkali.
Statement $II$: Solubility of alkaline earth metal hydroxides in water increases down the group.
In the light of the above statements,choose the most appropriate answer from the options given below:

Among the following,the basic oxide is .....

Arrange the following compounds in the increasing order of their thermal stability: $I. K_2CO_3, II. MgCO_3, III. CaCO_3, IV. BeCO_3$.

Which of the following has the lowest solubility?