The following compounds have been arranged in order of their increasing thermal stabilities. Identify the correct order. K2CO3 (I), MgCO3 (II) , CaCO3 (III) , BeCO3 (IV)

Question

The following compounds have been arranged in order of their increasing thermal stabilities. Identify the correct order. K2CO3 (I), MgCO3 (II) , CaCO3 (III) , BeCO3 (IV)  (A) I < II < III < IV (B) IV < II < III < I (C) IV < II < I < III (D) II < IV < III < I

Tardigrade Admin · Accepted Answer

Thermal stability of salts with common anion depends on polarising power of cation. Greater the polarising power, lower be their thermal stability. Hence,

B e C O_{3} (I V) < M g C O_{3} (II) < C a C O_{3} (III) < K_{2} C O_{3} (I)

Q. The following compounds have been arranged in order of their increasing thermal stabilities. Identify the correct order. K2​CO3​(I),MgCO3​(II),CaCO3​(III),BeCO3​(IV)

I < II < III < IV

IV < II < III < I

IV < II < I < III

II < IV < III < I

Thermal stability of salts with common anion depends on polarising power of cation. Greater the polarising power, lower be their thermal stability. Hence, BeCO3​(IV)<MgCO3​(II)<CaCO3​(III)<K2​CO3​(I)

Q. The following compounds have been arranged in order of their increasing thermal stabilities. Identify the correct order.
$K_{2} C O_{3} (I), M g C O_{3} (II), C a C O_{3} (III), B e C O_{3} (I V)$

Thermal stability of salts with common anion depends on polarising power of cation. Greater the polarising power, lower be their thermal stability. Hence,
$B e C O_{3} (I V) < M g C O_{3} (II) < C a C O_{3} (III) < K_{2} C O_{3} (I)$