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Q.

How many of the following substances can act as an acidic oxide?
$C a O, N a_{2} O, S i O_{2}, P_{4} O_{10}, M n O, P_{4} O_{8}, F e O, C r O_{3}, M n_{2} O_{7}, C u O$

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answer is 5.

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Detailed Solution

$S i O_{2}, P_{4} O_{10}, P_{4} O_{8}, C r O_{3}, M n_{2} O_{7}$

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