JEE Main · 2019 · 09 Apr 2019 · Shift 2 · s-Block Elements

The structures of beryllium chloride in the solid state and vapour, phase, respectively, are:

(A)chain and dimeric✓ Correct
(B)chain and chain
(C)dimeric and dimeric
(D)dimeric and chain

Answer: (A)

Solution

In the solid, beryllium chloride links up into long polymeric chains, each beryllium bridged to the next through shared chlorine atoms so as to complete its octet. In the vapour the chains break apart, giving at moderate temperatures a chlorine-bridged dimer

(BeCl X_{2}) X_{2}

. So the solid state is a chain and the vapour a dimer.

JEE Main · 2019 · 09 Apr 2019 · Shift 2 · Single correct option

Practise more: all JEE Main PYQs on s-Block Elements →

More JEE Main questions on s-Block Elements

The type of oxide formed by the element among $Li, Na, Be, Mg, B$ and Al that has the least atomic radius is :
JEE Main 2025View solution →
The $F^{-}$ ions make the enamel on teeth much harder by converting hydroxyapatite (the enamel on the surface of teeth) into much harder fluoroapatite having the formula.
JEE Main 2024View solution →
Number of metal ions characterized by flame test among the following is ____.
$Sr^{2 +}, Ba^{2 +}, Ca^{2 +}, Cu^{2 +}, Zn^{2 +}, Co^{2 +}, Fe^{2 +}$
JEE Main 2024View solution →
The setting time of Cement is increased by adding
JEE Main 2023View solution →
Ion having highest hydration enthalpy among the given alkaline earth metal ions is:-
JEE Main 2023View solution →
Structure of $BeCl_{2}$ in solid state, vapour phase and at very high temperature respectively are :-
JEE Main 2023View solution →