IX Practical Chemistry KBSE Experiment No. 2

To Separate Iron filings, Sand and Alum from their mixture.

Vice Voce
Q.1. What is the formula of Sand

Ans. The formula of sand is SiO2.


Q.2. What are Magnetic Substances?

Ans. Those substance which are attracted by magnet are known as Magnetic Substance.


Q.3. What is a Magnet?

Ans. Any substance when suspended freely always points North and South and attracts Iron, Nickel and Cobalt is called Magnet.


Q.4. What is Magnetism?

Ans. The power of attracting small pieces of Iron is called Magnetism.


Q.5. Give examples of three magnetic substances?

Ans. Iron, Nickel and Cobalt.


Q.6. What is Mixture?

Ans. When two or more substances combine together in any ratio and no new substance is obtained then the substance formed is known as a mixture.


Q.7. What is the formula of Alum?

Ans. The Formula of Alum is K2SO4, Al2(SO4)3.24H20


Q.8. Is Sand and element or a Compound?

Ans. Sand is a Compound.


Q.9. What is the Chemical name of Sand?

Ans. The Chemical name of sand is Silicon Dioxide.


Q.10. Is Alum an element or a Compound?

Ans. Alum is Compound.


Q.11. What is the difference between a Mixture and a Compound?

Ans.

MIXTURE In Mixture consitituent are present in any ratio and its properties are not totally different from its constituents.

COMPOUND In Compound the constituents are always present in a fixed ratio and the properties of compound are totally different from its constituents.


Q.12. How many elements are present in Alum?

Ans. There are five elements present in Alum.


Q.13. What are the names of the elements present in Alum?

Ans. The elements present in the Alum are

1. Potassium

2. Sulphur

3. Oxygen

4. Aluminium

5. Hydrogen


Q.14. Is Iron an element or Compound?

Ans. Iron is an element.


Q.15. Which element are present in Sand?

Ans. Silicon and Oxygen are present in the sand.


Q.16. What is the symbol of Iron?

Ans. The symbol of Iron is Fe.


Q.17. What is Alum?

Ans. Alum is a double salt.


Q.18. What is an element?

Ans. An element is a simple substance which cannot be further divided into simpler substances by ordinary Chemical Process.


Q.19. What is a Compound?

Ans. A Compound is composed of atoms of two or more than two elements.


Q.20. Define Mixture?

Ans. Mixture is that substance which is composed of two or more substances in which there is no Chemical bonding and the substances have been mixed in variable proportions.


Q.21. Give five examples of Element and Compounds?

Ans. Examples of Elements

1. Mercury

2. Oxygen

3. Aluminium

4. Sulphur

5. Iron

Examples of Compounds

1. Water

2. Calcium

3. Sulphate

4. Sugar

5. Baking Soda

6. Ammonium Chloride


Q.23. What is Filtration?

Ans. The process by which Insoluble impurities are removed from liquida is called Filtration.


Q.24. What are uses of Filtration?

Ans. Filtration is used in many industries for removing solid paticles from their liquid components e.g. muddy water is purified by means of filtration when suspended material is removed.


Q.25. What is Distillation?

Ans. Distillation is that process in which a liquid is converted into vapours and these vapours on condensation from liquid again.


Q.26. What is Distillate?

Ans. The vapour which is condensed into liquid is called Distillate.


Q.27. What is Filtrate?

Ans. The pure liquid obtained after filtration is called Filtrate.


Q.28. What is Filter Paper?

Ans. The porous paper used in the process of filtration is called Filter Paper.


Q.29. What is Residue?

Ans. The insoluble substance obtained on the filter paper is called Residue.


Q.30. What do you mean by Evaporation?

Ans. The process of changing of liquid into vapour at all temperature is called Evaporation.


Q.31. What are the uses of Distillation?

Ans. USES OF DISTILLATION The process of distillation is used to recover a solvent from solution. In industries the distillation is used in water distilleries for manufacture of Distilled water.


Q.32. How are the magnetic substances removed?

Ans. The magnetic substances are removed with the help of a magnet.


Q.33. How will you remove insoluble impurities?

Ans. The insoluble impurites are removed by Filtration.


Q.34. How are the Crystalline subtances removed?

Ans. Crystalline substances are removed by evaporation or Crystallization.


Q.35. Why does the sand remain on filter paper?

Ans. The sand is insoluble so if remains on the filter paper.


Q.36. What is Solute?

Ans. Any substance which dissolves in some other substance is called Solute

OR

The component of solution which is present in smaller amount is called the solute.


Q.37. What is Solvent?

Ans. Any substance which can dissolve a substance to form homogeneous mixture is called a solvent.

OR

The component of the solution present in greater amount is called the solvent.