Bleaching powder is obtained by passing chlorine on

Which of the following is the characteristic outer shell electronic configuration of alkaline earth metals?

Which one of the following pairs does not impart colour to the flame?

Reaction of $BeCl_{2}$ with $LiAlH_{4}$ gives.
$(A)$ $AlCl_{3}$; $(B)$ $BeH_{2}$; $(C)$ $LiH$; $(D)$ $LiCl$; $(E)$ $BeAlH_{4}$
Choose the correct answer from options given below.

$A$ metal $M$ readily gives $MSO_4$, which is soluble in water. It forms its oxide $MO$ which is amphoteric. It forms an insoluble hydroxide $M(OH)_2$, which is soluble in $NaOH$ solution. The $M$ is

Which of the following is an amphoteric hydroxide?