Separation of substances

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

• Sublimation

• Sedimentation

• Filtration

• Decantation

While preparing chapatis, Paheli 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

When is the solution saturated?

• No more salt can be dissolved in the amount of water we have taken

• Lot more salt can be added

• You have to add some sugar into the solution

• None of the above

The diagram shows the apparatus for separating soil and water. What are the labelled parts?

• A = distillate, B = filtrate
• A = filtrate, B = residue
• A = residue, B = filtrate
• A = residue, B = distillate

What is the boiling point of water?

• 0^oC
• 100^oC
• 80^oC
• 95^oC

Which one of the following is the name for separation technique in the picture below

• distillation
• dissolving
• evaporation
• decanting

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-ESS2-4

NGSS.MS-PS1-4

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-PS1-2

NGSS.MS-PS2-3

Which of the following is essential to perform winnowing activity?

• Wind

• Water

• Magnet

• Filter paper

Tags

NGSS.MS-ESS2-5