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  • The following compound have been arranged in order of their increasing thermal stabilities, indentify the correct order <img alt="\mathrm{\mathrm{K}_2 \mathrm{CO}_3 \text { (II) } \mathrm

The following compound have been arranged in order of their increasing thermal stabilities, indentify the correct order

\mathrm{\mathrm{K}_2 \mathrm{CO}_3 \text { (II) } \mathrm{MgCO}_3 \text { (II) } \mathrm{CaCO}_3 \text { (III) } \mathrm{BeCO}_3 \text { (IV) }}

Option: 1

\mathrm{I< II< III< IV}


Option: 2

\mathrm{IV< II< III< I}


Option: 3

\mathrm{IV< II< I< III}


Option: 4

\mathrm{II< IV< III< I}


Answers (1)

best_answer

Thermal stability of salts with common anion depends on polarising power of cation. Greater the polarising power, lower be their thermal stability. Hence,
\mathrm{BeCO}_3<\mathrm{MgCO}<\mathrm{CaCO}_3<\mathrm{K}_2 \mathrm{CO}_3

Hence option 2 is correct.

Posted by

Gautam harsolia

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