Carbonates and bicarbonates, thermal stability

27 questions on Carbonates and bicarbonates, thermal stability from the s-Block Elements chapter: 5 NEET level, 11 JEE Main, 11 JEE Advanced. Each one opens with its answer and solution.

• Which of the following alkali metal carbonates decomposes on moderate heating? NEET level
• In the Solvay process the compound that separates out as a solid from the ammoniated brine is: NEET level
• The chemical formula of washing soda is: NEET level
• Strong heating of limestone gives quicklime and: NEET level
• On heating solid sodium hydrogencarbonate, the products are: NEET level
• Which is the correct increasing order of thermal stability of the Group 2 carbonates? JEE Main level
• Which bicarbonate is not known in the solid state? JEE Main level
• The calcium compound obtained as the by-product of the Solvay ammonia-soda process is: JEE Main level
• For carbonic acid pK_a1 = 6.35 and pK_a2 = 10.33 at 298 K. The pH of a moderately concentrated aqueous solution of NaHCO3 is approximately: JEE Main level
• Water containing dissolved Ca(HCO3)2 is boiled for some time. The precipitate formed and the gas evolved are: JEE Main level
• A sample of 16.8 g of pure NaHCO3 (molar mass 84 g mol^-1) is heated until no further change occurs. The loss in mass is: JEE Main level
• Assertion (A): Sodium carbonate does not decompose on ordinary heating, even at red heat in a flame. Reason (R): An aqueous solution of sodium carbonate is alka... JEE Main level
• Match the compound in Column I with the statement in Column II. Column I: P Li2CO3, Q NaHCO3, R Ca(HCO3)2, S (NH4)2CO3. Column II: 1 on heating leaves only a me... JEE Main level
• Which of the following carbonates is the least soluble in water at 298 K? JEE Main level
• Dolomite, MgCO3.CaCO3, is heated to a temperature at which only the less stable carbonate decomposes. The solid residue is: JEE Main level
• 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
• Select the correct statement(s) about the Solvay process for making washing soda. 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 X, becomes clear (so... 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
• A 10.00 g mixture of NaHCO3 and Na2CO3 is heated strongly until constant mass, when the mass decreases by 1.40 g. Molar masses: NaHCO3 84, CO2 44, H2O 18 g/mol.... JEE Advanced level
• A white crystalline solid A dissolves in water and effervesces with dilute HCl to give a gas that turns lime water milky. On heating to constant mass A loses 31... JEE Advanced level
• A 25.0 g sample of impure limestone loses 9.68 g on strong heating (only CaCO3 decomposes; the impurities are inert and non-volatile). All the quicklime obtaine... JEE Advanced level
• Solid Li2CO3 is shaken with water and CO2 is passed until a clear solution forms. The clear solution is then boiled and a white precipitate X separates. The spe... JEE Advanced level
• Assume Delta H and Delta S are independent of temperature. For MgCO3(s) -> MgO(s) + CO2(g): Delta H = 117 kJ mol^-1 and Delta S = 175 J K^-1 mol^-1. For CaCO3(s... JEE Advanced level