Multiple-choice questions
1. hand picking method for separation of mixture can be formed when.
A. component to be a fit out is in large quantity.
B. component to fix out a small quantity .
C. component to be picked the have similar size and shape from other component.
D. both B and C .
2. Method which is commonly used by farmers in separating a lighter husk particles from heavier grains of wheat is.
A. Sieving
B. winnowing
C . Threshing
D. filtering
3. The impurities which are insoluble in water can be removed by .
A. Sedimentation
B. decantation
C. combination of A and B
D. neither A nor B
4. Mixture of oil and petrol can be separated by .
A. Sedimentation
B. Decantation
C. Combination of A and B
D. Neither A nor B
5. salt is obtained from seawater by.
A. condensation of water
B. evaporation of water
C. cooling of water
D. rotation of water
6. Cream and butter can be obtained from milk and curd after .
A. centrifugation
B. evaporation
C. cooling
D.filtration
7. We can separate mixture of iron filling and sand by .
A. sterilization
B. magnetization
C. evaporation
D. loading
