Separation of Substances from Mixtures

Separation of lanthanides from their mixture is not easy because of

Assertion : A mixture of plant pigments can be separated by chromatography. Reason : Chromatography is used for the separation of colourd substances into individual components.

Three students Renu, Manish and Raj were given three unknown liquids P, Q and R respectively during the lab activity. On the basis of these properties, which student has chosen the correct separation technique to separate the substance from substance-water mixture?

Mixtures are formed when two or more substances mix together in any proportion. Mixtures can be uniform (homogeneous) or non-uniform (heterogeneous). They possess the property of their constituents and can be separated by physical means. The substance used for mixture formation is