Name the appropriate method to separate a mixture of calcium sulfate and camphor.

Which method is used to separate a mixture of $KCl$ and $KClO_3$?

Which of the following pairs of elements might form an alloy?

For which one of the following mixtures is composition uniform throughout?

What is an element?

The separation of two coloured substances was done by paper chromatography. The distances travelled by solvent front,substance $A$ and substance $B$ from the base line are $3.25 \ cm$,$2.08 \ cm$ and $1.05 \ cm$ respectively. The ratio of $R_{f}$ values of $A$ to $B$ is $.........$