Which of the following is a true solution?

N a C l

is sulphur dioxide

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Copper in silver

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Salt in petrol

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Mud in water

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Solution

The correct option is B Copper in silver
NaCl in sulphur dioxide from molten sodium sulfate. Copper and silver are melted together to forms an alloy, salt is insoluble in petrol because petrol is non-polar solvent. Mud in water forms a colloidal solution, so, from the given options Copper in silver forms a true solution.

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