41
Salt can be separated from its solution (salt dissolved in water), because
Answer: mixing of salt in water is a change that can be reversed by evaporation.
Questions
44
Baking of dough into bread is a kind of change
Answer: that cannot be reversed
45
The process of converting vapours back into liquid is called as ______.
Answer: condensation
46
Which method is commonly used to separate salt from water?
Answer: evaporation
47
During filtration process, the dust particles which remain on filter paper is called _________.
Answer: residue
48
Transferring the clear liquid into another container using a glass rod is called ___________.
Answer: decantation
49
In sedimentation process, the clear liquid above the settled heavier component is called ________.
Answer: supernatant liquid
50
The heavier component in a mixture settles after water is added to it, the process is called ________
Answer: sedimentation
52
Which method is commonly used by farmers to separate lighter husk particles from heavier seeds of grain.
Answer: Winnowing
53
The process used for separating grains from stalk is called _________.
Answer: Threshing
54
The method of separating substances based on size, colour and shape is called _______.
Answer: Handpicking
55
Salt is obtained from sea water by using which of the following process.
Answer: Evaporation
56
The process of solid changing directly in vapour form without becoming liquid is called
Answer: sublimation
58
The solubility of water __________ with an increase in water.
Answer: increases
60
The spinner in washing machine dries clothes works on the principle of
Answer: centrifugation
