Question

10. Which method is used to separate gases of air in laboratory?
11. What is the most important difference between physical and chemical changes ?
f: 12. What is the principle of chromatography?
13. Which type of solution is soda water?
14. Name one metalloid.
15. Name one alloy.
apl
16. 'Milk is a pure substance'. This statement is true or false?
17. Which method can be used to separate two liquids with different boiling points ?
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Answer 1

Answer:

1.fractional distillation.

2.In a chemical reaction, there is a change in the composition of the substances in question; in a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition

3.principle where molecules in mixture applied onto the surface or into the solid, and fluid stationary phase (stable phase) is separating from each other while moving with the aid of a mobile phase.

4.Soda water is a liquid solution of water and carbon dioxide gas. Gas can be dissolved in water if the water's temperature is fairly low.

5.Boron

6.steel

7. No

Milk is not a pure substance; it is considered a mixture because it does not occur naturally on its own. It is a mixture that combines mostly water, sugar, fat and proteins.

8.Distillation is a process of separating mixtures based upon the principle that if two liquids have different boiling points they can be separated by controlled heating to evaporated one of the liquid and collecting it into another flask after condensation

Answer 2

Answer:

hey mate...... here is your answer.....

10) Fractional distillation

11) In physical change, no new substance is formed whereas in chemical change, new substance is formed.

12) Chromatography is based on the principle where molecules in mixture applied onto the surface or into the solid, and fluid stationary phase (stable phase) is separating from each other while moving with the aid of a mobile phase. Based on this approach three components form the basis of the chromatography technique.

13) Soda water is a liquid solution of water and carbon dioxide gas.

14) Silicon

15) Steel

16) No, milk is not a pure substance it is made by the mixture of many substances.

Explanation:

hope it helps you!