Which of the following oxides is most acidic?

A l_{2} O_{3}

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S i O_{2}

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P_{2} O_{5}

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S O_{3}

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Solution

The correct option is B $S O_{3}$
$S O_{3}$ is most acidic. In a period, when we move from left to right, the basic nature of oxides decreases and the acidic nature increases.
$N a_{2} O$ $M g O$
$A l_{2} O_{3}$
$S i O_{2}$
$P_{2} O_{5}$
$S O_{3}$ $C l_{2} O_{7}$
Strongly basic
Basic Amphoteric
weakly acidic
acidic
strongly acidic
strongly acidic

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Similar questions

Among $A l_{2} O_{3}, S i O_{2}, P_{2} O_{3}, a n d S O_{3}$ , the correct order of acid strength is:

A l_{2} O_{3}, S i O_{2}, P_{2} O_{3} a n d S O_{3}

Among $A l_{2} O_{3}, S i O_{2}, P_{2} O_{3}, a n d S O_{3}$ the correct order of acid strength is

C a O

M g O

C O_{2}

S O_{3}

N a_{2} O

Z n O

A l_{2} O_{3}

F e_{2} O_{3}

A l_{2} O_{3}, S i O_{2}, P_{2} O_{3}, S O_{2}

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$N a_{2} O$	$M g O$	$A l_{2} O_{3}$	$S i O_{2}$	$P_{2} O_{5}$	$S O_{3}$	$C l_{2} O_{7}$
Strongly basic	Basic	Amphoteric	weakly acidic	acidic	strongly acidic	strongly acidic