The order of equivalent conductances at infinite dilution for LiCl, NaCl and KCl is
LiCl > NaCl > KCl
KCl > NaCl > LiCl
NaCl > KCl > LiCl
LiCl > KCl > NaCl
Compound X is tested and the results are shown in the table.
Test | Result |
Aqueous sodium hydroxide is added, then heated gently. | Gas given off which turns damp red litmus paper blue |
Dilute hydrochloric acid is added. | Effervescence, gas given off which turns lime water milky and acidified K2Cr2O7, paper green. |
Which ions are present in compound X?
Ammonium ions and sulphite ions
Ammonium ions and carbonate ions
Sodium ions and carbonate ions
Ammonium ions and sulphate ions
Sulphuryl chloride (SO2Cl2) reacts with white phosphorus (P4) to give
PCl5, SO2
OPCl3, SOCl2
PCl5, SO2, S2Cl2
OPCl3, SO2, S2Cl2
Ionisation potential values of noble gases decrease down the group with increase in atomic size. Xenon forms binary fluorides by the direct reaction of elements. Identify the correct statement(s) from below.
Only the heavier noble gases form such compounds
It happens because the noble gases have higher ionisation energies
It happens because the compounds are formed with electronegative ligands
Octet of electrons provide the stable arrangements
If Cl2 is passed through hot aqueous NaOH, the products formed have Cl in different oxidation states. These are indicated as
-1 and +1
-1and +5
+1 and +5
-1and +3
The hydrides of the first elements in groups 15-17, namely NH3, H2O and HF respectively show abnormally high values for melting and boiling points. This is due to
small size of N, O and F
the ability to form extensive intermolecular H-bonding
the ability to form extensive intramolecular H-bonding
effective van der Waals' interaction
Among the following observations, the correct one that differentiates between and is
both form precipitate with BaCl2, dissolves in HCl but does not.
forms precipitate with BaCl2, does not.
forms precipitate with BaCl2, does not
both form precipitate with BaCl2, dissolves in HCl but does not.
'Sulphan' is
a mixture of SO3 and H2SO5
100% conc. H2SO4
a mixture of gypsum and conc. H2SO4
100% oleum (a mixture of 100% SO3 in 100% H2SO4)
D.
100% oleum (a mixture of 100% SO3 in 100% H2SO4)
H2SO4 saturated with SO3 is called oleum or sulphan.
H2SO4 + SO3 → H2S2O7
On heating, chloric acid decomposes to
HClO4, Cl2, O2 and H2O
HClO2, Cl2, O2 and H2O
HClO, Cl2O and H2O2
HCl, HClO, Cl2O and H2O