MolSynapsequestion bank

MolSynapse / Question bank / s-Block Elements / Carbonates and bicarbonates, thermal stability

JEE Advanced levelOne or more correct optionsDifficulty 3 of 3sb157

Select the correct statement(s) about the Solvay process for making washing soda.

AAmmonia is recovered from $NH X_{4} Cl$ by treating it with slaked lime.
BThe method works equally well for $K X_{2} CO X_{3}$ because $KHCO X_{3}$ is sparingly soluble.
CCarbon dioxide is obtained from the calcination of limestone.
D $Na X_{2} CO X_{3}$ is obtained by heating the precipitated $NaHCO X_{3}$ .

Answer: A, C, D

CaCO X_{3} CaO + CO X_{2}

supplies

CO X_{2}

and (after slaking) the base that regenerates ammonia from

NH X_{4} Cl

.

2 NaHCO X_{3} Na X_{2} CO X_{3} + CO X_{2} + H X_{2} O

gives the product.

KHCO X_{3}

is fairly soluble, so it does not precipitate and the process cannot be used for potassium carbonate.

Practice s-Block Elements More on Carbonates and bicarbonates, thermal stability

Previous questionNext question

More questions on Carbonates and bicarbonates, thermal stability

In the Solvay process NaHCO3 crystallises from the cold ammoniacal brine, rather than NH4HCO3, NaCl or NH4Cl, because: JEE Main level
Select the correct statement(s) about alkali metal carbonates and hydrogencarbonates. JEE Advanced level
Select the correct statement(s) about Group 2 carbonates. JEE Advanced level
Limestone is strongly heated and the gas X evolved is passed into lime water, which first turns milky (precipitate Y) and then, with excess ... JEE Advanced level
Select the correct statement(s) about aqueous sodium hydrogencarbonate at 298 K. JEE Advanced level
Solids are heated gently at about 430 K. Select the compound(s) that leave a solid residue of the corresponding normal carbonate. JEE Advanced level