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Ca হ্যালোইডের গলনাংক ক্রম
C
a
F
2
>
C
a
C
l
2
>
C
a
B
r
2
>
C
a
l
2
C
a
l
2
>
C
a
B
r
2
>
C
a
C
l
2
>
C
a
F
2
C
a
l
2
>
>
C
a
C
l
2
>
C
a
B
r
2
>
C
a
F
2
C
a
C
l
2
>
C
a
l
2
>
C
a
B
r
2
>
C
a
F
2
ANSWER : 1
Descrption
<p style="margin-left:0px;">The correct order of melting point for Calcium Halides is:</p><p style="margin-left:0px;"><strong>CaF2 > CaCl2 > CaBr2 > CaI2</strong></p><p style="margin-left:0px;">Here's the explanation:</p><ul><li><strong>Ionic bonding:</strong> Calcium halides are ionic compounds, where Ca²+ cation interacts with F⁻, Cl⁻, Br⁻, or I⁻ anions.</li><li><strong>Lattice energy:</strong> The melting point of an ionic compound depends on the strength of the ionic bond, which is determined by the lattice energy.</li><li><strong>Factors affecting lattice energy:</strong><ul><li><strong>Charge of ions:</strong> Higher charges on both cation and anion lead to stronger attraction and higher lattice energy. Ca²+ has the same charge in all these compounds.</li><li><strong>Ionic radii:</strong> Smaller radii of ions result in a closer packing and stronger electrostatic forces, leading to higher lattice energy. F⁻ has the smallest radius among the halides.</li></ul></li></ul>
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