A, B and C are hydroxy-compounds of the elements X, Y and Z respective

1.	A, B and C are hydroxy-compounds of the elements X, Y and Z respectively. X, Y and Z are in the same period of the periodic table. A gives an aqueous solution of pH less than seven. B reacts with both strong acids and strong alkalis. C gives an aqueous solution which is strongly alkaline Which of the following statements is/are true I : The three elements are metals II : The electronegativities decrease from X to Y to Z. III : The atomic radius decreases in the order X, Y and Z. IV : X, Y and Z could be phosphorus, aluminium and sodium respectively :
Answer» A, B and C are hydroxy-compounds of the elements X, Y and Z respectively. X, Y and Z are in the same period of the periodic table. A gives an aqueous solution of pH less than seven. B reacts with both strong acids and strong alkalis. C gives an aqueous solution which is strongly alkaline Which of the following statements is/are true I : The three elements are metals II : The electronegativities decrease from X to Y to Z. III : The atomic radius decreases in the order X, Y and Z. IV : X, Y and Z could be phosphorus, aluminium and sodium respectively :

A, B and C are hydroxy-compounds of the elements X, Y and Z respectively. X, Y and Z are in the same period of the periodic table. A gives an aqueous solution of pH less than seven. B reacts with both strong acids and strong alkalis. C gives an aqueous solution which is strongly alkaline Which of the following statements is/are true I : The three elements are metals II : The electronegativities decrease from X to Y to Z. III : The atomic radius decreases in the order X, Y and Z. IV : X, Y and Z could be phosphorus, aluminium and sodium respectively :

Answer»

A, B and C are hydroxy-compounds of the elements X, Y and Z respectively. X, Y and Z are in the same period of the periodic table. A gives an aqueous solution of pH less than seven. B reacts with both strong acids and strong alkalis. C gives an aqueous solution which is strongly alkaline

Which of the following statements is/are true

I : The three elements are metals

II : The electronegativities decrease from X to Y to Z.

III : The atomic radius decreases in the order X, Y and Z.

IV : X, Y and Z could be phosphorus, aluminium and sodium respectively :

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