A, B and C are oxides of elements X, Y and Z respectively. X, Y and Z are in the same period of the periodic table. A gives an aqueous solution which turns blue litmus red. B reacts with both strong acids and strong alkalies. C gives an aqueous solution which is strongly alkaline.

Which of the following stateme.nt is/are true?

(P) All the three elements are metals

(Q) The electronegativities decreases from X to Y to z.

(R) The atomic radius increases in the order X < Y <z.

($) X, Y and Z could be phosphorus, aluminium and sodium respectively

  1. A

    P, Q, R only correct

  2. B

    P, R only correct

  3. C

    Q, S only correct

  4. D

    Q, R, S only correct

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    Solution:

     acidic oxide; (non-metal) (X)

     B  amphoteric oxide (Y)

     C  basic oxide (metal) (Z)

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