Question

Which of the following has the highest decomposition temperature?

Solution

Correct option is

BaCO3

The lower the polarising power, the higher is the decomposition temperature of the alkaline earth metals. Ba has lowest polarizing power because of larger radius, hence BaCO3 has the highest decomposition temperature.

SIMILAR QUESTIONS

Q1

When magnesium burns in air compounds of magnesium formed are magnesium oxide and

Q2

A solid compound ‘X’ on heating gives CO2 gas and a residue. The residue mixed with water forms ‘Y’. On passing an excess of CO2 through ‘Y’ in water, a clear solution ‘Z’ is obtained. On boiling ‘Z’, compound ‘X’ is reformed. The compound ‘X’ is 

Q3

The carbonate that will not decompose on heating is

Q4

The correct order of increasing thermal stability of K2CO3, MgCO3, CaCO3 and BeCO3 is: 

Q5

In which of the following the hydration energy is higher than the lattice energy?

Q6

The solubility of alkali metal hydroxide follows the order:

Q7

The label on a bottle of H2O2 solution reads as ’10 volume’. The concentration of H2O2 in percentage by volume is

Q8

Bleaching powder slowly loses its activity when it stands in air. This is due to

Q9

Chloride of an element gives natural solution in water. In the periodic table the element belongs to

Q10

Among the following compounds of cement which is present in the highest amount?