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1
As temperature increases, the solubility of a gases also _________________.
Decreases
Increases
Both (a) and (b) are correct.
None of these.
2
Salt can be obtained from sea water by ________________
Filtration
Decantation
Evaporation
Sublimation
3
We can separate dirt particles present in muddy water as dirt tend to settle at the bottom after sometime due to the process of ____________________
Sedimentation
Magnetic separation
4
A mixture of ammonia and water is a _______________
Solution
Solvent
Both a and b
Solute
5
The process of conversation of water vapour into its liquid called ________________________.
Condensation
6
What kind of mixture can be separated by the process of Distillation ?
Homogeneous mixture
Heterogeneous mixture.
7
Preparation of salt from sea water involves ___________________
Sedimentation and decantation
8
The solution in which more solute can be dissolved at a given temperature is called _________________________.
Saturated solution
Unsaturated solution
Supersaturated solution
9
The process of increasing the rate of sedimentation is called __________________.
Loading
Distillation
10
A separation process that is a combination of evaporation and condensation in which the liquid is first converted to vapour by heating and the vapours of liquid are then cooled to get pure liquid is known as __________________
None of these
11
In the process of water purification, the final purification of water is done with the help of disinfectant like chlorine. Which of the following is the correct definition of disinfectants ?
A disinfectant is a chemical substance or compound used to inactivate or destroy microorganisms on inert surfaces
A disinfectant is a natural substance used to kill specifically viruses.
A disinfectant is a chemical substance used to remove dirt form the surface
A disinfectant is a chemical substance that is used to kill particularly insects.
12
Identify the one which is a solution among the following substances.
Soil
Air
Sea water
Coal
13
Which of the following method is used for waste water treatment ?
14
The amount of a solute in grams dissolved in _______ grams of a solvent to make a saturated solution is called the solubility.
1000 gm
100 gm
200 gm
50 gm
15
Which of the following is not an example of solvent for non aqueous solution ?
Acetone
Alcohol
Carbon tetrachloride
Water