Question

which of the following does not give an oxide on heating?
1.MgCO3
2.Li2CO3
3.ZnCO3
4.K2CO3​

Answer 1

Hi beautiful

Looking gorgeous

Here is ur answer

1A group metal carbonites thermal stability increases down the group.

K2CO3

Hence (4) is the correct answer.

Answer 2

Answer:

The correct answer is option 4.$K_{2} CO_{3}$​.

Explanation:

When metal carbonates are heated, they breakdown into metal oxide and carbon dioxide. On bunsen temperature, potassium carbonate does not degrade. It necessitates a very high temperature. Potassium carbonate is converted to potassium oxide and carbon dioxide when heated to a high temperature. The thermal stability of metal carbonates is determined by the metal's location in the reactivity series. The harder it is to breakdown a metal's compounds, the more reactive it is. As a result, heat has no effect on sodium and potassium carbonates.

$K_{2} CO_{3}$→$K_{2} O+CO_{2}$

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