# 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:

$\to$ acidic oxide; (non-metal) (X)

B $\to$ amphoteric oxide (Y)

C $\to$ basic oxide (metal) (Z)

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