The correct sequence of increasing melting po | vedclass

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Question

(B) The melting point of alkaline earth metal chlorides depends on their ionic character. As the size of the cation increases from $Be^{2+}$ to $Ba^{2

Vedclass · Accepted Answer

$BeCl_2 < MgCl_2 < CaCl_2 < SrCl_2 < BaCl_2$

Vedclass · Answer

(B) The melting point of alkaline earth metal chlorides depends on their ionic character. As the size of the cation increases from $Be^{2+}$ to $Ba^{2+}$,the polarizing power of the cation decreases,leading to an increase in the ionic character of the $M-Cl$ bond. Greater ionic character results in stronger electrostatic forces of attraction,which increases the melting point. Therefore,the order of increasing melting points is $BeCl_2 < MgCl_2 < CaCl_2 < SrCl_2 < BaCl_2$.

The correct sequence of increasing melting points of $BeCl_2$,$MgCl_2$,$CaCl_2$,$SrCl_2$,and $BaCl_2$ is:

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