Chemistry - Complete s-block Question with Solution | TestHub
Consider the following statements:
(I) The Solvay process cannot be used for the formation of K₂CO₃ because KHCO₃ and NH₄Cl are not easily separated.
(II) The flame test for Ca, Sr, and Ba is helpful in their detection in qualitative analysis and estimation by flame photometry.
(III) All Group 2 metal oxides (MO) are basic in nature and have a rock salt structure.
(IV) The formation of hypochlorite from milk of lime is a disproportionation redox reaction.
(V) Seawater cannot be used in marine boilers.
(VI) The solubility of NaCl appreciably increases on increasing temperature.
Select the option containing all INCORRECT statements.
Answer:
Solution:
Statements I, III, and VI are incorrect for the following reasons:
Statement I: The Solvay process fails for K₂CO₃ because KHCO₃ is highly soluble in water and cannot be precipitated out like NaHCO₃.
Statement III: Not all group 2 oxides are basic or have a rock salt structure; BeO is amphoteric and crystallizes in a wurtzite structure.
Statement VI: The solubility of NaCl hardly changes (increases only marginally) with a rise in temperature.
