The s-Block Ele...

Which one of the following species does not exist under normal conditions?

Mg is present in 

Sulphate of an alkaline earth metal which crystalizes without water of hydration is?

Sodium and potassium react with water much more vigorously than lithium because:

A substance X, which is an oxide of a group 2 element, is used intensively in the cement industry. This element is present in bones also. On treatment with water, it forms a solution which turns red litmus blue. Identify X :

The colour of transition metal compound is due to :

Alkaline earth metal nitrates on heating decompose to give:

Consider the following statements and arrange in the order of true/false as given in the codes.
$$S_1$$: Sodium amalgam reacts with hot water and produces sodium hydroxide and hydrogen gas.
$$S_2$$: Sodium is more reactive than potassium.
$$S_3$$: Alkaline earth metals dissolve in liquid ammonia to give deep blue-black solutions which are conducting.
$$S_4$$: Alkaline earth metal salts have more number of water molecules as compared to those of alkali metal salts.

Property of all the alkaline earth metals that increases with their atomic number is:

The energy of an electron in a particular orbit of single electron species of beryllium is the same as the energy of an electron in the ground state of a hydrogen atom. Identify the orbit of beryllium.