Class 6 Separation of Substances

The process of settling down of particles of a solid in a liquid is

• Sublimation

• Sedimentation

• Filtration

• Decantation

While preparing chapatis, Priti found that the flour to be used was mixed with wheat grains. Which out of the following is the most suitable method to separate the grains from the flour?

• Threshing

• Sieving

• Winnowing

• Filtration

What is the process that is used to separate grains from stalks called?

• handpicking

• threshing

• sieving

• winnowing

What separation technique does the picture show?

• Sieving

• filtering

• magnetic separation

• Distillation

Tags

NGSS.MS-PS2-3

The drops of water that appear on the outside of a glass of cold water on a warm day are an example of?

• sublimation
• condensation
• evaporation

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Iron and copper screws could be separated using a magnet because

• iron is magnetic, copper is not
• copper is magnetic, iron is not
• neither metal is magnetic
• copper screws are heavier than iron and fall off the magnet

Tags

NGSS.MS-PS2-3

What is the purpose of Filtration?

• Separating and insoluble solid from a liquid

• Separation of a mixture of 2 solids

• Separates heavier substances from a suspension

Which of the following is essential to perform winnowing activity?

• Wind

• Water

• Magnet

• Filter paper

Tags

NGSS.MS-ESS2-5

The process of changing solid to gas directly is ______

• Evaporation

• Condensation

• Melting

• Sublimation

Tags

NGSS.MS-PS1-4

Statement A: A mixture of cement and pebbles can be separated by using the sieve with small pores Statement B: A sieve with small pores will allow only small cement particles to pass through and will hold back the pebbles

• a. Statement A is true only
• b. Statement B is true only
• c. Both are false
• d. Both are true