Question

On heating which of the following releases $$C{O_2}$$  most easily ?

A. $${K_2}C{O_3}$$
B. $$N{a_2}C{O_3}$$
C. $$MgC{O_3}$$  
D. $$CaC{O_3}$$
Answer :   $$MgC{O_3}$$
Solution :
Order of thermal stability is $${K_2}C{O_3} > N{a_2}C{O_3} > CaC{O_3} > MgC{O_3}$$
Hence, $$MgC{O_3}$$  releases $$C{O_2}$$  most easily \[MgC{{O}_{3}}\xrightarrow{\Delta }MgO+C{{O}_{2}}\]

Releted MCQ Question on
Inorganic Chemistry >> S - Block Elements

Releted Question 1

A substance absorbs $$C{O_2}$$  and voilently reacts with water. The substance is

A. $$CaC{O_3}$$
B. $$CaO$$
C. $${H_2}S{O_4}$$
D. $$ZnO$$
View Answer
Releted Question 2

Calcium is obtained by

A. electrolysis of molten $$CaC{l_2}.$$
B. electrolysis of solution of $$CaC{l_2}$$  in water.
C. Reduction of $$CaC{l_2}$$  with carbon.
D. roasting of limestone.
View Answer
Releted Question 3

A solution of sodium metal in liquid ammonia is strongly reducing due to the presence of

A. sodium atoms
B. sodium hydride
C. sodium amide
D. solvated electrons
View Answer
Releted Question 4

The hydration energy of $$M{g^{ + + }}$$  is larger than that of :

A. $$A{l^{3 + }}$$
B. $$N{a^ + }$$
C. $$B{e^{ + + }}$$
D. $$M{g^{3 + }}$$
View Answer

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S - Block Elements

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Physical ChemistrySome Basic Concepts in ChemistryStoichiometryStates of Matter Solid, Liquid and GasAtomic StructureChemical ThermodynamicsSolutionsSolid StateSurface ChemistryChemical EquilibriumIonic EquilibriumChemical KineticsRedox ReactionElectrochemistryNuclear Chemistry
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