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Question: Which of the following represents incorrect order ?...

Which of the following represents incorrect order ?

A

NaCl<MgCl2<AlCl3<SiCl4\mathbf{NaCl < MgC}\mathbf{l}_{\mathbf{2}}\mathbf{< AlC}\mathbf{l}_{\mathbf{3}}\mathbf{< SiC}\mathbf{l}_{\mathbf{4}}

(Order of covalent character)

B

BeCO3<MgCO3<CaCO3<SrCO3\mathbf{BeC}\mathbf{O}_{\mathbf{3}}\mathbf{< MgC}\mathbf{O}_{\mathbf{3}}\mathbf{< CaC}\mathbf{O}_{\mathbf{3}}\mathbf{< SrC}\mathbf{O}_{\mathbf{3}}

(Order of solubility in water)

C

BeCO3<MgCO3<CaCO3<SrCO3BeCO_{3} < MgCO_{3} < CaCO_{3} < SrCO_{3}

(Order of thermal stability)

D

LiCl<CsCl<RbCl<KCl<NaCl

(Order of melting point)

Answer

BeCO3<MgCO3<CaCO3<SrCO3\mathbf{BeC}\mathbf{O}_{\mathbf{3}}\mathbf{< MgC}\mathbf{O}_{\mathbf{3}}\mathbf{< CaC}\mathbf{O}_{\mathbf{3}}\mathbf{< SrC}\mathbf{O}_{\mathbf{3}}

(Order of solubility in water)

Explanation

Solution

correct order of solubility:

BeCO3>MgCO3>CaCO3>SrCO3BeCO_{3} > MgCO_{3} > CaCO_{3} > SrCO_{3}