MolSynapsequestion bank

MolSynapse / Question bank / s-Block Elements / Important compounds: NaOH, Na2CO3, NaHCO3, CaO, CaCO3, plaster of Paris

JEE Advanced levelOne or more correct optionsDifficulty 3 of 3sb215

Which of the following statements about the Solvay process are correct?

AAmmonia is recycled by heating $NH X_{4} Cl$ with slaked lime obtained from quicklime.
BA $K X_{2} CO X_{3}$ analogue fails since $KHCO X_{3}$ is too soluble to precipitate.
CThe $CO X_{2}$ is obtained from the calcination of limestone and of $NaHCO X_{3}$ .
D $Na X_{2} CO X_{3}$ is precipitated directly from the ammoniacal brine.

Answer: A, B, C

The key precipitate is

NaHCO X_{3}

, which is calcined to

Na X_{2} CO X_{3}

, so the direct-precipitation statement is false.

CaCO X_{3}

calcination and

NaHCO X_{3}

calcination supply

CO X_{2}

, the

CaO

made gives slaked lime that frees

NH X_{3}

, and

KHCO X_{3}

does not separate.

Practice s-Block Elements More on Important compounds: NaOH, Na2CO3, NaHCO3, CaO, CaCO3, plaster of Paris

Previous questionNext question

More questions on Important compounds: NaOH, Na2CO3, NaHCO3, CaO, CaCO3, plaster of Paris

In the Solvay process with complete recycling of NH3 and CO2, the mass of CaCl2 formed as by-product for every 106 g of Na2CO3 produced is (... JEE Advanced level
In a Solvay plant all the CO2 obtained by calcining NaHCO3 is recycled, the rest of the CO2 comes from limestone (85.0% CaCO3 by mass, impur... JEE Advanced level
Chlorine reacts with aqueous sodium hydroxide. Which of the following statements are correct? JEE Advanced level
Which of the following statements about plaster of Paris are correct? JEE Advanced level
Which of the following conversions can be achieved in a single step? JEE Advanced level
Use pKa1 = 6.35 and pKa2 = 10.33 for H2CO3 at 298 K and pKw = 14. Which of the following statements about 0.10 M aqueous solutions are corre... JEE Advanced level