Chemistry, 19.06.2021 15:30, AshlynPlayz45
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
Answers: 2
Chemistry, 22.06.2019 12:00, 1963038660
What are the first two quantum numbers for the electrons located in subshell 4d? what are the first three quantum numbers for the electrons located in subshell 2s? how many electrons can be held in a sublevel l = 3? how many electrons can be held in the energy level n = 4? how many electrons in an atom can share the quantum numbers n = 4 and l = 3?
Answers: 1
Chemistry, 22.06.2019 14:00, luisaareli6298
Calculate the energy required to ionize a hydrogen atom to an excited state where the electron is initially in the n = 5 energy level. report your answer in kilojoules
Answers: 1
Chemistry, 23.06.2019 00:30, runninglovexoxo
The molecular weight of carbon dioxide, co2, is 44.00 amu, and the molecular weight of nitrous dioxide, no2, is 46.01 amu, so no2 diffuses co2
Answers: 2
Multiple-choice questions
1. hand picking method for separation of mixture can be formed when.
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