Exams › NEET › Chemistry

On heating which of the following releases CO2 most easily?

1. K2CO3
2. Na2CO3
3. MgCO3
4. CaCO3

Correct answer: MgCO3

Solution

MgCO3 decomposes more easily than CaCO3, Na2CO3, or K2CO3 because the thermal stability of carbonates increases down the group in alkali and alkaline earth metals. MgCO3, being higher in the group, decomposes at a lower temperature.

Related NEET Chemistry questions

• Compare the physical properties of metals and non-metals in general with reference to malleability.
• Which of one of the following burns in the air giving a gaseous oxide? (at room temp.)
• Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field?
• Identify the alloy containing a non-metal as a constituent in it.
• Mg is present in which of the following?
• Among the following oxides, the one which is most basic is:

⚔️ Practice NEET Chemistry free + battle 1v1 →