CBSE Class 6 Science Methods of Separation in Everyday Life (Class 6 NCERT New) Quiz 7

1. A student observes that after filtering a muddy water sample, the water collected still appears slightly coloured. What can be concluded, and what additional step might help obtain cleaner water?

A The filter paper worked perfectly; no additional step is needed B The mud particles were too large; decantation should be done before filtration next time C Some very fine particles passed through the filter paper; using a finer filter or repeating filtration may help D The water is coloured because of evaporation; heating will remove the colour

2. A mixture contains sugar, sand, and iron filings. A student claims that evaporation alone can separate all three components. Evaluate this claim and identify the correct sequence of methods to separate all three components.

A The claim is correct; evaporation can separate all three at different temperatures B The claim is incorrect; the correct sequence is magnetic separation to remove iron filings, then dissolving in water and filtering to remove sand, then evaporating to collect sugar C The claim is incorrect; the correct sequence is filtration first, then evaporation, then magnetic separation D The claim is correct; heating the mixture will cause each component to separate on its own

3. Which of the following techniques can we use to separate homogeneous mixtures?

A Crystallisation B Distillation C Evaporation D All of the above

4. Name the separation technique

A Centrifuge B Bunsen burner C Distillation D Evaporation

5. True or false: Magnets can be used to separate iron filings from sand

A True B False

6. True or false: Filtration can be used to separate substances in a solution

A True B False

7. In a salt water solution ...

A Salt is the solute and water is the solvent B Salt is the solvent and water is the solute

8. True or false: Sieving can be used to separate a mixture with two solid components of different sizes

A True B False

9. True or false: Decanting is a technique that can be used to separate a salt water solution

A True B False

10. What is the separation technique for which this lab instrument is needed?

A sieving B decanting C filtering D magnetic separation