Match the following: Separation processes|Purpose| |a. Peeling of fruits|1. To obtain both the useful components| |b. Churning of milk|2. To separate seeds from the fibre| |c. Ginning of cotton|3. To obtain useful edible parts|

We need to separate the edible part of a grain from the scaly, inedible chaff that surrounds it. ________ method is used to hammer the stalks and separate the grains from them.

_________ process is used to separate two immiscible liquids.

Rice grains of different sizes are used for different purposes. Small rice grains are used for making khichdi and longer grains are used for pulao. Which of the following methods can be used to separate broken rice from the whole rice?

Some food types can cause reactions in human body if they are taken for a long time. Which of the following can cause paralysis if consumed for a long time?

Which of the following statements is/are false?

a. The choice of the method of separation depends upon the nature and the properties of its constituents. b. Salt or sugar as well as water retain their individual properties in solution form. c. The method of hand-picking is used to remove unwanted particles from a mixture in which components are present in a large quantity.

_________ is the method of separation of chaff and grain where the grain that is heavier falls down vertically, while the husk being lighter is carried away by wind to form a separate heap. This method is also used to separate weevils or other pests from stored grain.

Which of the following substances cannot be used during the process of filtration?

Which of the following statements is/are false?

a. A fixed amount of water can dissolve different amounts of soluble elements at a fixed temperature. b. A dissolved solid component can be separated by the method of decantation from its solution. c. A liquid can be separated from a salt solution by the process of condensation.

Which of the following methods can be used to separate water from a suspension of chalk powder and water?

Which of the following is the correct sequence of the processes involved in separating impure common salt (containing sand and dirt) that is dissolved in water?

Which of the following is added to filtered water to kill harmful microorganisms?

Which of the following is not a disease that can be caused by harmful bacteria in filtered water?

Which of the following statements is/are false?

a. Separation by sieving is possible only if the size of one kind of particles is bigger and the size of other kind of particles is smaller than the size of holes in the sieve. b. Residue is the clear liquid obtained after filtration. c. Wheat flour and chaff can be removed by using the method of sieving.

Match the following:

Common salt can be derived from seawater. Which of the following process is used to obtain it?

Which of the following processes are based on the principle of different densities of two different components of a given mixture?

a. Sedimentation b. Evaporation c. Decantation d. Filtration

Match the following:

Which of the following processes are involved in the formation of rainwater from sea?

a. Decantation b. Evaporation c. Condensation d. Sublimation