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
Microcosmic salt is
Na2HPO4 .2H2O
(NH4)2HPO4 . 2H2O
Na(NH4)HPO4 .4H2O
None of the above
Which of the following compounds has the lowest anion to cation size ratio?
LiF
NaF
CsI
CsF
Which of the following ions forms a hydroxide, highly soluble in water?
Ni2+
K+
Zn2+
Al3+
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
Nitrogen dioxide cannot be prepared by heating
KNO3
Pb(NO3)2
Cu(NO3)2
AgNO3
The pair of compounds which cannot exist together in solution is
NaHCO3 and NaOH
NaHCO3 and H2O
NaHCO3 and Na2CO3
Na2CO3 and NaOH
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 gas evolved on heating Na2CO3 is
CO2
Water vapour
CO
No gas is evolved
