Alkali metals

Which of the following statements are correct ?

(A) Both LiCl and $\mathrm{MgCl_2}$ are soluble in ethanol.

(B) The oxides $\mathrm{Li_2O}$ and MgO combine with excess of oxygen to give superoxide.

(C) LiF is less soluble in water than other alkali metal fluorides.

(D) $\mathrm{Li_2O}$ is more soluble in water than other alkali metal oxides.

Choose the most appropriate answer from the options given below :

Match List - I with List - II.

Choose the most appropriate answer from the options given below :

Match List - I with List - II.

Choose the most appropriate answer from the options given below :

Correct statement about alkali metal oxides is

Choose the correct order of density of the alkali metals :

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: LiF is sparingly soluble in water.

Reason R: The ionic radius of $\mathrm{Li^+}$ ion is smallest among its group members, hence has least hydration enthalpy.

In the light of the above statements, choose the most appropriate answer from the options given below.

An element A of group 1 shows similarity to an element B belonging to group 2. If A has maximum hydration enthalpy in group 1 then B is :

Which of the following statement is incorrect ?

Statement I : An alloy of lithium and magnesium is used to make aircraft plates.

Statement II : The magnesium ions are important for cell-membrane integrity.

In the light the above statements, choose the correct answer from the options given below

Lithium nitrate and sodium nitrate, when heated separately, respectively, give :

Both lithium and magnesium display several similar properties due to the diagonal relationship; however, the one which is incorrect, is :

A metal 'M' reacts with nitrogen gas to afford '$\ce{M3N}$'. '$\ce{M3N}$' on heating at high temperature gives back 'M' and on reaction with water produces a gas 'B'. Gas 'B' reacts with aqueous solution of $\ce{CuSO4}$ to form a deep blue compound. 'M' and 'B' respectively are :

The main oxides formed on combustion of Li, Na and K in excess of air are, respectively :

The pair(s) of reagents that yield paramagnetic species is/are

The compound(s) formed upon combustion of sodium metal in excess air is(are)

STATEMENT-1: Alkali metals dissolve in liquid ammonia to give blue solutions.

because

STATEMENT-2: Alkali metals in liquid ammonia give solvated species of the type $\ce{[M(NH3)_n]+}$ (M = alkali metals).