Answer:

16. TRUE

• Mixtures can be physically separated by using methods that use differences in physical properties to separate the components of the mixture, such as evaporation, distillation, filtration and chromatography.

17. TRUE

• Distillation is used to separate liquids from nonvolatile solids, as in the separation of alcoholic liquors from fermented materials, or in the separation of two or more liquids having different boiling points, as in the separation of gasoline, kerosene, and lubricating oil from crude oil.

18. TRUE

• In this process the mixture is passed through the filter paper. The liquid gets easily passed through the pores of a filter leaving behind only solid particles. The water is called as filtrate and the solid is called as 'residue'.

19. FALSE

• filtration, the process in which solid particles in a liquid or gaseous fluid are removed by the use of a filter medium that permits the fluid to pass through but retains the solid particles.

20. FALSE

• There are four main mining methods: underground, open surface (pit), placer, and in-situ mining. Underground mines are more expensive and are often used to reach deeper deposits.

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Answer:

16.true

17.true

18.true

19.false

20.false