When a solid directly gets converted into vapour, this process is known as ____________.
  • Fusion
  • Sublimation
  • Evaporation
  • Sedimentation
_________ is the process of separating lighter husk particles and heavier grain seed components by blowing a current of air through them.
  • Winnowing
  • Sedimentation
  • Threshing
  • None of these
The process of separation  of tea leaves by strainer is called
  • Evaporation
  • Filtration
  • condensation
  • Decantation
Match the columns
Column I Column II
(a) Salt mixed with water (i) Sieving
(b) A mixture of wheat grains and rice flakes (ii) Evaporation
(c) Oil mixed with water (iii)Winnowing
(d) Rice flour mixed with kidney beans (iv) Decantation
  • a -> i, b -> iii, c -> iv , d -> ii
  • a -> ii, b -> iii, c -> i , d -> iv
  • a -> iii, b -> ii, c -> iv , d -> i
  • a -> ii, b -> iii, c -> iv , d -> i
The simple process of separating slightly bigger sized harmful substances or other useful substances or impurities like small pieces of stones, husk and dirt from grains of wheat, pulses and rice is called
  • handpicking
  • Threshing
  • Sieving
  • churning
Which of the following mixtures would you be able to separate using the method of filtration?
  • Oil in water
  • Cornflakes in milk
  • Salt in water
  • Sugar in milk
______can be defined as the process through which dirt and other heavier particles in a mixture settle at the bottom of the vessel when water is added to it.
  • Condensation
  • Sedimentation
  • Sublimation
  • None of these
During summer, Boojho carries water in a transparent plastic bottle to his school. One day he left his bottle in the school. The bottle still had some water left in it. The following day, he observed some water droplets on the inner surface of the empty portion of the bottle. These droplets of water were formed due to
  • boiling and condensation.
  • evaporation and saturation.
  • evaporation and condensation.
  • condensation and saturation.
Which of the following technique is used for separating mixture of two or more gases?
  • Filtration
  • Centrifugation
  • Liquification
  • Sedimentation
Which of the following cannot be used as a filter material?
  • Cotton
  • Butter paper
  • Ceramic
  • Muslin cloth
The chemical used for loading is
  • AL (Aluminum)
  • Baking Soda
  • Baking Powder
  • ALum
How are green seeds removed from their stalks?
  • Winnowing
  • Threshing
  • Sieving
  • Handpicking
Which of the following is a mixture?
  • Nitrogen dioxide
  • Carbon dioxide
  • Smoke
  • All of the above
How to separate solid dissolved in liquid?
  • Condensation
  • Loading
  • Evaporation
  • Decantation
The process of changing vapour into its liquid state is called.
  • Sedimentation
  • Condensation
  • Decantation
  • Loading
Cleaning of flour is done by the process of
  • Winnowing
  • Sieving
  • Threshing
  • Filtration
We can separate oil from water by.
  • sedimentation
  • filtration
  • decantation
  • all of the above
the substance used for the process of loading is.
  • Iron
  • Aluminum
  • Alum
  • Weighing bars
The process used for separating sand & water is
  • Sedimentation
  • Loading
  • Decantation
  • Winnowing
Mixing salt in water gives a solution which is a
  • Heterogeneous mixture
  • Compound
  • Homogeneous mixture
  • None of the above
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