A, B and C are hydroxy compounds of the elements P, Q and R respectively. P, Q and R are in the same period of the periodic table. A gives an aqueous solution of \[pH>7\]. B reacts with both strong acids and strong alkalies. C gives an aqueous solution which is strongly alkaline. Which of the following statement(s) is/are true? I. All the three elements are metals. II. The atomic radius decreases in the order P, Q, R. III. The electron negativities decrease from P to Q to R. IV. P, Q and R could be \[P,Al\] and Na respectively.

A, B and C are hydroxy compounds of the elements P, Q and R respective

1.	A, B and C are hydroxy compounds of the elements P, Q and R respectively. P, Q and R are in the same period of the periodic table. A gives an aqueous solution of \[pH>7\]. B reacts with both strong acids and strong alkalies. C gives an aqueous solution which is strongly alkaline. Which of the following statement(s) is/are true? I. All the three elements are metals. II. The atomic radius decreases in the order P, Q, R. III. The electron negativities decrease from P to Q to R. IV. P, Q and R could be \[P,Al\] and Na respectively.
A.	I, II and IV
B.	III and IV only
C.	II, III and IV
D.	All are correct
Answer» C. II, III and IV

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