A yellow coloured amphoteric oxide X react with caustic soda to give a colourless salt of sodium plumbate and water. What is X?

Sodium oxide

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Potassium oxide

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Lead oxide

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Zinc oxide

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Solution

The correct option is C
Lead oxide

Lead oxide reacts with sodium hydroxide to give sodium plumbate and water.

$P b O Y e l l o w + 2 N a O H \to N a_{2} P b O_{2} S o d i u m p l u m b a t e C o l o u r l e s s s o l u b l e + 2 H_{2} O$

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