CBSE
Fe(OH)3 can be separated from Al(OH)3 by the addition of
NaCl solution
dil. HCl solution
NaOH solution
NH4Cl and NH4OH
Select the incorrect statement among the following:
O3 is used as germicide for purification of air
In O3, O-O bond length is identical with that of molecular oxygen
O3 molecule is angular in shape.
O3 is an oxidising agent
Which one of the following processes is used for the manufacture of calcium?
Reduction of CaO with carbon
Reduction of CaO with hydrogen
Electrolysis of a mixture of anhydrous CaCl2 and KCl
Electrolysis of molten Ca(OH)2
Identify the correct order of solubility in aqueous medium.
CuS > ZnS > Na2S
ZnS > Na2S > CuS
Na2S > CuS > ZnS
Na2S > ZnS > CuS
Sodium pyrophosphate is represented by which of the following formula ?
Na2P2O4
Na4P2O5
Na4P2O7
Na2P2O5
which of the following represents the composition of carnallite mineral?
K2O.Al2O3.6SiO2
KNO3
K2SO4.MgSO4.MgCl2.6H2O
KCl.MgCl2.6H2O
Mg and Zn
Fe and Mg
Ni and Zn
Al and Zn
Assertion : Na2SO4 is soluble in water while BaSO4 is not.
Reason : Lattice energy of BaSO4 exceeds its hydration energy.
If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
If Assertion is true but Reason is false.
If Assertion is false but Reason is true.
Of the following compounds, the most acidic is
As2O3
P2O5
Sb2O3
Bi2O3
Write with a balanced chemical equation how gypsum is used for the conversion of ammonia into ammonium sulnate without using H2SO4 ?