A chemist spots an unknown sample on a tlc plate and, Chemistry

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A chemist spots an unknown sample on a tlc plate and

A chemist spots an unknown sample on a TLC plate and develops it in dichloromethane solvent. Only one sport, for which the Rf value is 0.95, is observed. Does this indicate that the unknown material is a pure compound? what can be done to verify the purity of this compound?

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