Beryllium and aluminium exhibit many properties which are similar. But the two elements differ in

• exhibiting maximum covalency in compound

• exhibiting amphoteric nature in their oxides

• forming covalent halides

• forming covalent halides

Aluminium chloride exists as a dimer, Al₂Cl₆ in the solid state as well as in solution of non-polar solvents such as benzene. When dissolved in water, it gives

• Al³⁺ + 3Cl^-

• Al₂O₃ + 6HCl

• [Al(OH)₆] ^3-

• [Al(OH)₆] ^3-

Nitrogen dioxide is not produced on heating

• KNO₃

• Pb(NO₃)₂

• Cu(NO₃)₂

• AgNO₃

224.

In the solid state, PCl₅ exists as

• [PCl₄]^- and [PCl₆]⁺ ions

• covalent PCl₅ molecules only

• [PCl₄]⁺ and [PCl₆]^-

• covalent P₂Cl₁₀ molecules only

The acid in which O-O bonding is present is

• H₂S₂O₃

• H₂S₂O₆

• H₂S₂O₈

• H₂S₄O₆

If radium and chlorine combine to form radium chloride, the compound would be

• half as radioactive as radium

• twice as radioactive

• as radioactive as radium

• not radioactive

Which of the following arrangements is correct in respect of solubility in water?

• CaSO₄ > BaSO₄ > BeSO₄ > MgSO₄ > SrSO₄

• BeSO₄ > MgSO₄, > CaSO_4, > SrSO_4, > BaSO₄

• BaSO₄> SrSO₄ > CaSO₄ >MgSO₄ > BeSO₄

• BeSO₄ > CaSO₄, > MgSO₄ >SrSO₄ > BaSO₄

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.

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