In the chapter test of Ch 1 : Modern Periodic Table (ICSE CHEMISTRY) This question's solution...as per my knowledge is marked wrong....

Q.   On moving left to right across a period, the acidity of the oxides of elements .

A)
    ​increases

B)    ​decreases

C)    ​remains the same

D)    ​first increases and then decreases 

Dear Student,

As we move left to right across a period, the non metallic character of the elements increases i.e. the elements become non-metal on going from left to right. We know that non-metals form acidic oxide. Therefore, acidic character of the elements increases as we move left to right across a period.

Hence, correct answer is (A)
 

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