Eg., Copper (Cu), Silicon (Si), Gold (Ag).Has definite physical and chemical properties.Cannot be broken down further into to simpler substances by chemical methods.Write the differences between elements and compounds and give an example for each. Can be a solid-liquid or solid-gas or liquid-gas or solid-solid, or liquid-liquid mixtures.Components are visible to the naked eye.There are visible boundaries between the components.Eg: chalk in water, petrol in water, sand in water, etc. Components are not uniformly mixed and it will have more than a single phase.They will be in solid, liquid or in the gaseous phase.
Components are not visible to the naked eye.No boundaries of separation between the components.Components are uniformly mixed and it will have a single phase,Įg: Alloys, salt solution, lemonade, petrol etc.How are homogenous solutions different from a heterogeneous solutions? Explain with examples. The iron filings in the mixture can be separated by Magnetic separation and Naphthalene by sublimation. How will you separate a mixture containing sawdust, naphthalene and iron filings? It is made of 22 parts of pure gold and 2 parts of copper or silver. Have you just procured a pure substance or impure substance? You have just won a medal made of 22-carat gold. Ice, Iron, Hydrochloric acid, Mercury, and water are pure substances. Ice, Milk, Iron, Hydrochloric acid, Mercury, Brick, and Water. Which of the following are pure substances? Soil is a mixture of clay, sand and various salts.Air is a mixture of nitrogen, oxygen, carbon dioxide, water vapour, and other gases.Lemonade is a mixture of lemon juice, sugar and water.Ice cream is a mixture of cream, milk, sugar & sometimes egg.Name the components in each of the following mixtures. Miscible liquids – Fractional distillation (Fractionating column and Liebig) Condenser.Name the apparatus that you will use to separate the components of mixtures containing two, i. On dilution with water, the micro-emulsion destabilises releasing the pine oil and castor oil as a visible bloom. It is manufactured using Chloroxylenol 4.8% and the rest made up by pine oil, isopropanol, castor oil, and soap. The Dettol formulation is a stabilised micro-emulsion. Charcoal is called the adsorbent and the gas is called the adsorbate.Ĭertain solids change directly to a gas without passing through the liquid is called sublimation.Ī few drops of ‘DettoP when added to water the mixture turns turbid. For example: charcoal adsorbs gases on its surface.Adsorption is the process in which particles of a substance, (it could be gas, liquid or dissolved solid) adhere to a surface of another substance.For example a paper (absorbent) soaks up or absorbs water.
In petroleum refining, the method of separation used is ………….ĥ. Alcohol can be separated from water by ………….Ĥ. An example of a substance that sublimes is…………ģ. mixture has no distinguishable boundary between its components.Ģ. It is because the components are combined in a fixed ratio by mass.ġ. Aspirin is a mixture.Ĭorrect statement: It is Compound. Aspirin is composed of 60% Carbon, 4.5% Hydrogen and 35.5% Oxygen by mass. Buttermilk is an example of heterogeneous mixture.ĥ. Liquid – liquid colloids are called gelsĬorrect statement: Liquid – solid colloids are called gels.Ĥ. A compound cannot be broken into simpler substances chemically.Ĭorrect statement: A compound can be broken into simpler substances chemically.ģ. Oil and water are immiscible in each other.Ģ. ………………… has the same properties throughout the sample. ……………….is essential to perform separation by solvent extraction method. When we mix a drop of ink in water we get a. The separation of denser particles from lighter particles done by rotation at high speed is called ………………
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