Solubility of alkaline earth metal sulphates decreases down the group 2 because
They become more ionic
Lattice energy of sulphates does not vary significantly
Hydration energy decreases rapidly from Be2+ to Ba2+
Lattice energy plays more predominant role than hydration energy
The gas evolved on heating Na2CO3 is
CO2
Water vapour
CO
No gas is evolved
A colourless salt (X) has 50% Na2SO3 and 50% H2O. How much of SO2 at NTP is obtained when 2.52 g of (X) reacts with excess of dil H2SO4 ?
22.4 L
0.448 L
44.8 L
0.224 L
Which of the following compounds has the lowest anion to cation size ratio?
LiF
NaF
CsI
CsF
Select most spontaneous reaction
2CaCl(s) → CaCl2(s) + Ca(s)
CaCl2(s) + Ca(s) → 2CaCl(s)
CaCl(s) → Ca(s) + Cl2(g)
CaCl2(s) → Ca(s) + Cl2(g)
The pair of compounds which cannot exist together in solution is
NaHCO3 and NaOH
NaHCO3 and H2O
NaHCO3 and Na2CO3
Na2CO3 and NaOH
Microcosmic salt is
Na2HPO4 .2H2O
(NH4)2HPO4 . 2H2O
Na(NH4)HPO4 .4H2O
None of the above
Nitrogen dioxide cannot be prepared by heating
KNO3
Pb(NO3)2
Cu(NO3)2
AgNO3
Which of the following ions forms a hydroxide, highly soluble in water?
Ni2+
K+
Zn2+
Al3+
